JP4670231B2 - Memory element, operation method thereof, arithmetic element, and arithmetic element integrated device - Google Patents

Description

  The present invention relates to a memory element, an operation method thereof, an arithmetic element, an operation method thereof, and an arithmetic element integrated device, and is particularly based on a novel principle.

  A memory element used in a conventional arithmetic element uses a transistor structure manufactured by microfabrication on an inorganic semiconductor substrate made of silicon or a compound semiconductor, as represented by SRAM, DRAM, or the like. However, the inorganic semiconductor substrate has rigidity. Most compound semiconductors have highly toxic components such as As and Se. For this reason, by incorporating such a memory element, there has been a problem that the flexibility of the product is lost and the risk of environmental pollution at the time of disposal increases.

  Regarding the possibility of other arithmetic elements, quantum arithmetic elements based on principles different from conventional classical arithmetic have been proposed. This is a kind of massively parallel calculation using the superposition principle peculiar to quantum mechanics as a memory element. Thereby, it is expected that operations such as prime factorization and Fourier transform can be performed at higher speed. However, the quantum computation methods that have been proposed so far include nuclear magnetic resonance (NMR) using the spin state of the nucleus, cavity quantum electrodynamics (QED) using the measurement means of quantum optics, ions, -There is a trap method etc., but from the viewpoint of temperature conditions and equipment configuration, none of them are easy to use on a daily basis. Further, the material constituting the arithmetic element is a quantum dot produced by microfabrication into an atomic nucleus, ion, or semiconductor heterostructure, and the above-mentioned problems of product flexibility and environmental load cannot be overcome.

  On the other hand, when turning from inorganic materials to organic materials, so-called molecular electronics proposed in the mid-1970s is expected to be able to realize electronic devices based on principles different from conventional inorganic semiconductor technologies. . Among the possibilities not found in inorganic semiconductor technology, for example, it is expected that the steps of device fabrication will be reduced by so-called self-organization, in which organic molecules naturally create structures without using lithography microfabrication. ing. In particular, with regard to the above-described transistors, research and development of organic field effect transistors using conductive organic molecules and carbon nanotubes have been vigorously continued. Organic molecules used as materials in molecular electronics have the advantage of being soft and having a low environmental impact. However, to date, problems such as control of bonding between organic molecules and electrode metal, control of orientation of organic molecules with respect to electrodes, resistance of organic molecules to applied voltage and heat generation have not been solved. For this reason, it is difficult to put into practical use an element utilizing the electrical conductivity of organic molecules.

In addition, an organic optical element that performs a logical operation using an electronic transition between energy levels of organic molecules has been proposed. As a specific example, for example, a degassed cyclohexane solution of 9,10-diphenylanthracene is placed in an optical cell. The thing using the thing is mentioned (patent document 1). An organic thin film comprising a photosensitive molecular film and an organic molecular film formed adjacent to the photosensitive molecular film and having a function of receiving charges from the photosensitive molecular film, and the photosensitive molecules in the photosensitive molecular film Organic light having a means for controlling a charge separation state caused by transition of an electric charge generated by excitation of a photosensitive molecule to an organic molecule having a function of receiving electric charge with irradiation of light in a wavelength region absorbed by An element has been proposed (Patent Document 2).
Japanese Patent Laid-Open No. 8-114824 JP-A-5-63255

In addition, in red photosynthetic bacteria, it has been reported that there are two types of cyclic structures composed of a plurality of bacteriochlorophylls (Non-patent Document 1). Moreover, the synthesis example of a porphyrin cyclic structure body is reported (nonpatent literature 2).
J. Bacter., 181 (1999) 3869 J. Am. Chem. Soc., 125 (2003) 2372

As described above, until now, no arithmetic element having flexibility and environmental compatibility has been proposed.
Therefore, the problem to be solved by the present invention is to provide an arithmetic element and an arithmetic element integrated device having flexibility and environmental compatibility, and a memory element suitable for use in configuring them.
Another problem to be solved by the present invention is to provide a method for operating the arithmetic element and the memory element.

The present inventor has intensively studied to solve the above problems. The outline will be described as follows.
In recent years, attention has been focused on the optical functionality of organic molecules. In particular, research on the reaction center of photosynthesis and the structure and function of the antenna system have been carried out, and the structure of the molecular organization and its effective optical energy collection and transfer function (optical antenna function) have been clarified. ing. Furthermore, various molecular structures using porphyrin molecules and phthalocyanine molecules have been synthesized by imitating the molecular structure of the photosynthetic reaction center. The present inventor has constructed a memory element using such an organic molecular structure having an optical antenna function, whereby a memory element based on a novel operating principle capable of inputting / outputting memory contents by irradiation of electromagnetic waves. It has been found that by using this memory element as an arithmetic element, a novel arithmetic element capable of performing an operation by irradiation with electromagnetic waves can be realized, and the present invention has been devised. Is.

That is, in order to solve the above problem, the first invention of the present invention is:
A memory element comprising an organic molecular organization having an optical antenna function.

  In this memory element, memory contents can be input / output by irradiating the organic molecular tissue with electromagnetic waves (for example, light such as laser light). In this memory element, typically, an organic molecular organization has three quantum states with different energies. These three quantum states are typically a stable state, a metastable state and an unstable excited state, respectively, or a stable state, a metastable state and an excited state, respectively. In the latter case, the stable state, metastable state and excited state have lower energy in this order, and preferably the transition between the stable state and the excited state and the transition between the metastable state and the excited state are optical. Transition time between the stable and metastable states is optically forbidden or sufficiently longer than the relaxation time from the excited state to the stable state and the relaxation time from the excited state to the metastable state. Have.

  In order to read out the memory content of the memory element, the memory element has an intermediate state having energy higher than that of the stable state and the metastable state in addition to the three quantum states (when the excited state is the first intermediate state, Second intermediate state). In this case, typically, the transition between the stable state and the second intermediate state is optically acceptable, and the transition between the metastable state and the second intermediate state is optically forbidden or the second intermediate state. A transition time sufficiently longer than the relaxation time from the state to the stable state, or the transition between the metastable state and the second intermediate state is optically acceptable, and between the stable state and the second intermediate state. The transition between has an optically forbidden or transition time sufficiently longer than the relaxation time from the second intermediate state to the metastable state.

The second invention of this invention is:
An operation method of a memory element constituted by an organic molecular organization having an optical antenna function,
The memory contents are input and output by irradiating the organic molecular structure with electromagnetic waves.
In the second invention, what has been described in relation to the first invention is valid as long as it is not contrary to the nature of the invention.

The third invention of the present invention is:
An arithmetic element comprising a plurality of memory elements arranged with an organic molecular organization having an optical antenna function.

  In this computing element, computation can be performed by irradiating the organic molecular tissue constituting the memory element with electromagnetic waves. In this case, an electromagnetic interaction works between the plurality of storage elements. As a result of this electromagnetic interaction, the frequency of electromagnetic waves required for inputting / outputting the stored contents of these plurality of storage elements shifts depending on the state of each other.

The fourth invention of the present invention is:
An operation method of an arithmetic element using a memory element composed of an organic molecular organization having an optical antenna function,
The calculation is performed by irradiating the organic molecular structure with electromagnetic waves.

The fifth invention of the present invention is:
An arithmetic element integrated device comprising a plurality of arithmetic elements in which a plurality of memory elements each composed of an organic molecular organization having an optical antenna function are arranged and integrated.
In the third to fifth inventions, what has been described in relation to the first invention is valid as long as it is not contrary to the nature thereof.

  According to the present invention configured as described above, the organic molecular structure is excellent in flexibility and has a low environmental load.

  According to the present invention, by using an organic molecular structure that is excellent in flexibility and has a low environmental load, it is possible to easily input and output stored contents by irradiation of electromagnetic waves such as light, and the flexibility and environment. A memory element having an affinity can be obtained. By using this memory element, an arithmetic element can be easily performed by irradiation of electromagnetic waves such as light, and an arithmetic element having flexibility and environmental compatibility can be obtained. Can do.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows energy levels (three-level system) of a binary storage element according to this embodiment. In FIG. 1, | 0> is a stable state (ground state), | 1> is a metastable state, and | 2> is an intermediate state and an excited state. The frequency corresponding to the energy difference between the state | 0> and the state | 2> is ω (02), and the frequency corresponding to the energy difference between the state | 1> and the state | 2> is ω (12). And ω (02)> ω (12). The relaxation time from the state | 2> to the state | 0> is τ (20), and the relaxation time from the state | 2> to the state | 1> is τ (21). Here, the transition between the stable state | 0> and the intermediate state | 2> and the transition between the metastable state | 1> and the intermediate state | 2> are optically acceptable, and the stable state | 0>. And the metastable state | 1> are optically forbidden or have transition times sufficiently longer than the above two relaxation times (in order τ (20), τ (21)).

Next, the state of the storage element is associated with the stored content. Manipulation of stored contents, that is, input / output, is performed by irradiating an organic molecular organization constituting each storage element with an electromagnetic wave (for example, pulsed laser light). Hereinafter, a state writing method will be described.
First, when the stored content is set to | 0>, that is, when | 0> is written, the electromagnetic wave having the frequency ω (12) is irradiated for a time longer than τ (20). If the initial state is | 0>, since ω (02)> ω (12), no transition occurs and the state | 0> is maintained. If the initial state is | 1>, the state once transits to the intermediate state | 2> and then relaxes to the state | 0>. In either case, the final state is | 0>. That is, | 0> is written.

  Next, when the stored content is set to | 1>, that is, when | 1> is written, the electromagnetic wave having the frequency ω (02) is irradiated for a time longer than τ (21) in the same manner as described above. At this time, if the initial state is | 0>, the state temporarily transitions to the intermediate state | 2> and then relaxes to the state | 1>. If the initial state is | 1>, since ω (02)> ω (12), no transition occurs and the state | 1> is maintained. In either case, the final state is | 1>. That is, | 1> is written.

Next, the arithmetic processing mechanism of this arithmetic element will be described.
Here, for the sake of simplicity, calculation processing of an arithmetic element in which two storage elements are arranged adjacent to each other will be described. However, in principle, similar arithmetic processing can be performed even in an arithmetic element composed of more storage elements. Is possible.
FIG. 2 shows the energy levels of two storage elements adjacent to each other. In the following description, both storage elements are the same as each other. However, even if both storage elements are different from each other, they are essentially the same except that the types of prepared electromagnetic wave frequencies are increased.

For convenience of explanation, the two storage elements are named A and B. The state of A and B is expressed as | AB>. For example, a state where A is | 0> and B is | 1> is expressed as | 01>.
In this case, as a result of the electromagnetic interaction (for example, dipole interaction) acting between the storage elements A and B, the level of each state in one storage element shifts depending on the state of the other storage element. The frequency corresponding to the energy difference between the state | jk> and the state | 2k> is ω (j2, k), and the frequency corresponding to the energy difference between the state | jk> and the state | j2> is ω (j , K2) (where j, k = 1, 2). As a result of the above interaction, ω (j2,0) ≠ ω (j2,1), ω (0, k2) ≠ ω (1, k2).
In order to write the state, for example, when the memory element A is set to | 0>, electromagnetic waves having the frequencies ω (12, 0) and ω (12, 1) are irradiated for a time longer than τ (20). Writing in other states can be performed in the same manner.

  Next, an example of calculation by this calculation element will be described. Here, an arithmetic process in which the states of the storage elements A and B are input and the state of A after processing is output is considered, but the same applies to the case where the state of B is output. Hereinafter, the product of A and B (A · B), the sum of A and B (A + B), the negation of A (A bar), and the negation of B (B bar) will be described. Various operations can be performed by combining these operations.

  First, the calculation of the product A · B can be realized by irradiating ω (12,0) for a longer time than τ (20). In this case, since the states | 00>, | 01>, and | 11> do not cause a transition, the results of A and B are output to A as they are. State | 10> once makes a transition to state | 20> and relaxes to state | 00>. As a result, “0”, which is the result of the product A · B, is output to A. Similarly, regarding the calculation of the sum A + B, the electromagnetic wave having the frequency ω (02,1) may be irradiated for a time longer than τ (21).

  Next, a negative operation will be described. First, in order to perform the calculation of the B bar, electromagnetic waves having frequencies ω (02, 0) and ω (12, 1) may be irradiated for a time longer than both τ (21) and τ (20). As a result, the states | 01> and | 10> remain as they are, while the state | 00> is finally moved to the state | 10> and the state | 11> is moved to the state | 01>. B bar is also output to A.

  Next, the calculation of A bar is performed as follows. First, electromagnetic waves having frequencies ω (1,02) and ω (0,12) are irradiated for a longer time than both τ (21) and τ (20). By this operation, both the states | 00> and | 01> move to the state | 00>, and the states | 10> and | 11> both move to the state | 11>. Next, electromagnetic waves with frequencies ω (02, 0) and ω (12, 1) are irradiated for a longer time than both τ (21) and τ (20). As a result, the state | 00> moves to the state | 10>, and the state | 11> moves to the state | 01>. Eventually, A bar is output to A for any initial state.

  Finally, reading of the storage state will be described. For this purpose, the memory element needs to have another intermediate state (hereinafter referred to as a second intermediate state) in addition to the above intermediate state. This second intermediate state is required to satisfy the following conditions. That is, the transition between the stable state and the second intermediate state is optically acceptable, and the transition between the metastable state and the second intermediate state is optically forbidden or from the second intermediate state to the stable state. Has a transition time sufficiently longer than the relaxation time, or the transition between the metastable state and the second intermediate state is optically acceptable, and the transition between the stable state and the second intermediate state is optical The transition time is sufficiently longer than the relaxation time of the transition from the forbidden or second intermediate state to the metastable state. Hereinafter, the former case will be described as an example, but the latter case is essentially the same. In the following description, one memory element is dealt with. However, when the level is shifted due to interaction, the frequency appearing in the explanatory text is read as a value shifted appropriately.

  FIG. 3 shows energy levels including the second intermediate state. | 3> is the second intermediate state. The frequency corresponding to the energy difference between the state | 0> and the state | 3> is ω (03), and the frequency corresponding to the energy difference between the state | 1> and the state | 3> is ω (13). write. In this case, it is required that ω (02) ≠ ω (03) and ω (12) ≠ ω (13). In FIG. 3, ω (02) <ω (03) and ω (12) <ω (13) are satisfied. However, even if the direction of the inequality sign is reversed, the read operation described below is possible in the same manner. .

Reading the stored contents of the storage element is performed as follows.
In order to read out whether the state of the memory element is | 0> or | 1>, the memory element is irradiated with an electromagnetic wave having a frequency ω (03). If the initial state is at | 0>, the state once transitions to | 3>. Thereafter, the state transits again to the state | 0>, but at the same time, the fluorescence of the frequency ω (03) is emitted. On the other hand, when the initial state is | 1>, no transition occurs and the state | 1> is maintained. Therefore, the memory state can be read out by measuring whether or not the fluorescence having the frequency ω (03) is emitted after the electromagnetic wave irradiation. The state after reading is also kept the same as before reading.

  In this embodiment, an optical antenna function is provided to realize a three-level system (four-level system including an intermediate state necessary for reading) necessary for configuring the above-described binary storage element. Use organic molecular organization. The three-dimensional structure of a complex of dye molecules and proteins (so-called antenna system) involved in the initial process of photosynthesis was revealed by X-ray analysis in the mid-1990s. The antenna system has an effective optical energy collection and energy transfer function to the reaction center (so-called optical antenna function), and research is being conducted on the relationship between such function and structure. In addition, many attempts have been made to synthesize an organic molecular organization having an optical function artificially with the motivation of the antenna system structure.

  As the organic molecular tissue having the antenna function, for example, a structure composed of a dye molecule such as bacteriochlorophyll or chlorophyll and a protein supporting the same is used. The dye molecule is based on porphyrin. Porphyrin is an organic molecule having a square-like skeleton, and has two transition dipole moments orthogonal to each other in a plane. In the red photosynthetic bacterium which is a primitive photosynthetic system, there are two kinds of cyclic structures composed of a plurality of bacteriochlorophylls. One of them is called LHI and surrounds the reaction center. The other is called LHII, which is arranged in a satellite pattern around LHI. LHII further comprises two types of internal and external ring structures. In the annular structure inside LHII, 18 bacteriochlorophylls are arranged on the circumference at almost equal intervals (Non-patent Document 1). Each bacteriochlorophyll is arranged so that the normal of the porphyrin portion faces the radial direction of the circumference, and one of the transition dipole moments is parallel to the tangent of the circle. Since a dipole interaction works between these transition dipole moments, the excited state of the LHII inner ring does not become an independent excited state of each porphyrin, but a linear combination (so-called exciton state) Become.

  A description will be given of what exciton states are realized in the system composed of the above-described circumferentially arranged transition dipole moments. FIG. 4A is a schematic diagram of this system, and each arrow in the figure represents transition dipole moments arranged at equal intervals on the circumference. These transition dipole moments are equal in magnitude and their orientation is parallel to the circumferential tangent. Although FIG. 4A shows a system of eight transition dipole moments, what follows is valid for any number (hereinafter referred to as N) of systems of transition dipole moments.

ここに、

はそれぞれｊ番目の遷移双極子の励起状態、μ番目の励起子状態および係数である。上で述べたように、最近接の遷移双極子モーメント間の相互作用のみを考慮すると、問題は周期境界条件下での連成振動子の問題と等価となり、上式の係数は、円周方向に離散的な波数を持つ正弦関数あるいは余弦関数で表される。離散的な波数に由来する節の数に対応して、励起状態のエネルギー準位および光学的性質も変化する。節の数が多くなるほど、エネルギー準位が高くなる。以下、便宜のため、エネルギー準位の低い励起子状態から順に第１励起子状態、第２励起子状態、…と名づける。また、基底状態から励起子状態への遷移双極子モーメントは、環状組織体のサイズは数十〜数百オングストロームのオーダーであり、照射する電磁波の電磁場は全ての遷移双極子と同位相で相互作用するため、次式で与えられる。

ここに、

は、それぞれｊ番目の遷移双極子モーメント、μ番目の励起子状態の遷移双極子モーメントである。 Here, for simplicity, only the interaction between adjacent transition dipole moments is considered. Since the magnitude of the dipole interaction is inversely proportional to the sixth power of the distance between the dipoles, it is the interaction between the closest transition dipole moments that contributes most to the formation of the excited state. At this time, the excited state is expressed by a linear combination of individual excited states as in the following equation.

here,

Are the excited state, the μth exciton state and the coefficient of the jth transition dipole, respectively. As mentioned above, considering only the interaction between the nearest transition dipole moments, the problem is equivalent to the problem of a coupled oscillator under periodic boundary conditions. Is expressed as a sine function or cosine function with a discrete wave number. Corresponding to the number of nodes derived from discrete wave numbers, the energy levels and optical properties of the excited states also change. The higher the number of nodes, the higher the energy level. Hereinafter, for convenience, the first exciton state, the second exciton state, and so on are named in order from the exciton state having the lowest energy level. In addition, the transition dipole moment from the ground state to the exciton state is the order of several tens to several hundred angstroms in the size of the ring structure, and the electromagnetic field of the radiated electromagnetic wave interacts with all the transition dipoles in the same phase. Is given by the following equation.

here,

Are the j-th transition dipole moment and the μ-th exciton state transition dipole moment, respectively.

  Some examples of exciton states are shown in FIGS. 4B-4F. FIG. 4B shows the exciton state without a node. This is the first exciton state. Moreover, the transition dipole moment from the ground state is zero. In the second exciton state, two states are degenerated. These are shown in FIGS. 4C and 4D. The number of nodes is two. Moreover, it has a transition dipole moment of a finite size orthogonal to each other.

  The exciton states of FIGS. 4E and 4F have 4 and 8 nodes, respectively, and the transition dipole moment is zero. Similarly, by calculating the transition dipole moment, it is clear that in general, the exciton state having a finite magnitude transition dipole moment is only the second exciton state.

In this embodiment, a memory element is configured using the ground state and exciton state of the annular structure described above, and an arithmetic element is configured by arranging a plurality of the memory elements. That is, the state | 0> in the above description of the memory element may be used as the ground state, the state | 1> as the first excited state, the state | 2> as the second excited state, or a linear combination thereof. In addition, regarding the reading, another exciton state can be used as an intermediate state (second intermediate state).
If the specific example of the organic molecular structure which has said antenna function is given, it will be a synthetic | combination porphyrin cyclic structure as shown in FIG. 5 (nonpatent literature 2).

  As described above, according to this embodiment, the memory element is constituted by the organic molecular organization that is excellent in flexibility and has little environmental load, and the arithmetic element is constituted by arranging a plurality of the memory elements. In addition, a memory element and an arithmetic element having both flexibility and environmental compatibility can be obtained. In addition, this storage element can easily input and output stored contents by irradiation with electromagnetic waves such as light. In addition, this arithmetic element can be easily operated by irradiation with electromagnetic waves such as light. These memory elements and arithmetic elements can be suitably used for information processing.

The embodiment of the present invention has been specifically described above, but the present invention is not limited to the above-described embodiment, and various modifications based on the technical idea of the present invention are possible.
For example, the numerical values and configurations described in the above embodiments are merely examples, and different numerical values and configurations may be used as necessary.

It is a basic diagram which shows the 3 level system for demonstrating the principle of operation | movement of the memory element by one Embodiment of this invention. It is a basic diagram which shows two adjacent 3 level systems for demonstrating the operating principle of the memory element by one Embodiment of this invention. It is a basic diagram which shows the 4 level system for demonstrating the operating principle of the memory element by one Embodiment of this invention. It is a basic diagram which shows the system which consists of the transition dipole moment arranged in the annular | circular shape for demonstrating the operating principle of the memory element by one Embodiment of this invention. It is a basic diagram which shows the system which consists of the transition dipole moment arranged in the annular | circular shape for demonstrating the operating principle of the memory element by one Embodiment of this invention. It is a basic diagram which shows the system which consists of the transition dipole moment arranged in the annular | circular shape for demonstrating the operating principle of the memory element by one Embodiment of this invention. It is a basic diagram which shows the system which consists of the transition dipole moment arranged in the annular | circular shape for demonstrating the operating principle of the memory element by one Embodiment of this invention. It is a basic diagram which shows the system which consists of the transition dipole moment arranged in the annular | circular shape for demonstrating the operating principle of the memory element by one Embodiment of this invention. It is a basic diagram which shows the system which consists of the transition dipole moment arranged in the annular | circular shape for demonstrating the operating principle of the memory element by one Embodiment of this invention. It is a basic diagram which shows the porphyrin cyclic structure as a specific example of the organic molecular structure which has an antenna function used in the memory element by one Embodiment of this invention.

Claims (12)

Consists of an organic molecular organization having an optical antenna function,
The organic molecular organization has four quantum states with different energies,
The four quantum states are a stable state, a metastable state, a first intermediate state, and a second intermediate state, and lower energy in the order of the stable state, the metastable state, the second intermediate state, and the first intermediate state. Have
The transition between the stable state and the second intermediate state is optically acceptable, and the transition between the metastable state and the second intermediate state is optically forbidden or from the second intermediate state to the above A transition time sufficiently longer than the relaxation time to the stable state, or a transition between the metastable state and the second intermediate state is optically acceptable, and the stable state and the second intermediate state The transition between and optically forbidden or has a transition time sufficiently longer than the relaxation time of the transition from the second intermediate state to the metastable state,
When the stored content is set to the stable state, an electromagnetic wave having a frequency corresponding to an energy difference between the metastable state and the first intermediate state is transferred from the first intermediate state to the stable state. Irradiate for a longer time than the relaxation time to
When the stored content is set to the metastable state, an electromagnetic wave having a frequency corresponding to an energy difference between the stable state and the first intermediate state is transferred from the first intermediate state to the metastable state. Irradiate for longer than the relaxation time to the state,
When the stored content is read, the organic molecular tissue is irradiated with an electromagnetic wave having a frequency corresponding to the energy difference between the stable state and the second intermediate state, and between the stable state and the second intermediate state. A memory element that measures whether or not fluorescence having a frequency corresponding to an energy difference between the two is emitted. The memory element according to claim 1, wherein the organic molecular organization has a cyclic structure. The memory element according to claim 2, wherein the organic molecular organization is a porphyrin cyclic organization. Consists of an organic molecular organization having an optical antenna function,
The organic molecular organization has four quantum states with different energies,
The four quantum states are a stable state, a metastable state, a first intermediate state, and a second intermediate state, and lower energy in the order of the stable state, the metastable state, the second intermediate state, and the first intermediate state. Have
The transition between the stable state and the second intermediate state is optically acceptable, and the transition between the metastable state and the second intermediate state is optically forbidden or from the second intermediate state to the above A transition time sufficiently longer than the relaxation time to the stable state, or a transition between the metastable state and the second intermediate state is optically acceptable, and the stable state and the second intermediate state The transition between the optical element is optically forbidden or the storage content of the memory element having a transition time sufficiently longer than the relaxation time of the transition from the second intermediate state to the metastable state is set to the stable state, Irradiating the organic molecular structure with electromagnetic waves having a frequency corresponding to an energy difference between the metastable state and the first intermediate state for a time longer than the relaxation time from the first intermediate state to the stable state;
When the storage content of the memory element is to be in the metastable state, an electromagnetic wave having a frequency corresponding to an energy difference between the stable state and the first intermediate state is transmitted to the organic molecular organization in the first intermediate state. Irradiation for a time longer than the relaxation time from the metastable state to
When reading the memory content of the storage element, the organic molecular tissue is irradiated with an electromagnetic wave having a frequency corresponding to an energy difference between the stable state and the second intermediate state, and the stable state and the second intermediate state are irradiated. A method for operating a storage element, wherein whether or not fluorescence having a frequency corresponding to an energy difference between states is emitted is measured. 5. The method of operating a memory element according to claim 4, wherein the organic molecular organization has a ring structure. 6. The operation method of a memory element according to claim 5, wherein the organic molecular organization is a porphyrin cyclic organization. Consists of an organic molecular organization having an optical antenna function,
The organic molecular organization has four quantum states with different energies,
The four quantum states are a stable state, a metastable state, a first intermediate state, and a second intermediate state, and lower energy in the order of the stable state, the metastable state, the second intermediate state, and the first intermediate state. Have
The transition between the stable state and the second intermediate state is optically acceptable, and the transition between the metastable state and the second intermediate state is optically forbidden or from the second intermediate state to the above A transition time sufficiently longer than the relaxation time to the stable state, or a transition between the metastable state and the second intermediate state is optically acceptable, and the stable state and the second intermediate state The transition between and optically forbidden or has a transition time sufficiently longer than the relaxation time of the transition from the second intermediate state to the metastable state,
When the stored content is set to the stable state, an electromagnetic wave having a frequency corresponding to an energy difference between the metastable state and the first intermediate state is transferred from the first intermediate state to the stable state. Irradiate for a longer time than the relaxation time to
When the stored content is set to the metastable state, an electromagnetic wave having a frequency corresponding to an energy difference between the stable state and the first intermediate state is transferred from the first intermediate state to the metastable state. Irradiate for longer than the relaxation time to the state,
When the stored content is read, the organic molecular tissue is irradiated with an electromagnetic wave having a frequency corresponding to the energy difference between the stable state and the second intermediate state, and between the stable state and the second intermediate state. An arithmetic element in which a plurality of storage elements are arranged to measure whether or not fluorescence having a frequency corresponding to the energy difference is emitted. The arithmetic element according to claim 7, wherein the organic molecular organization has a cyclic structure. The arithmetic element according to claim 8, wherein the organic molecular organization is a porphyrin cyclic organization. Consists of an organic molecular organization having an optical antenna function,
The organic molecular organization has four quantum states with different energies,
The four quantum states are a stable state, a metastable state, a first intermediate state, and a second intermediate state, and lower energy in the order of the stable state, the metastable state, the second intermediate state, and the first intermediate state. Have
The transition between the stable state and the second intermediate state is optically acceptable, and the transition between the metastable state and the second intermediate state is optically forbidden or from the second intermediate state to the above A transition time sufficiently longer than the relaxation time to the stable state, or a transition between the metastable state and the second intermediate state is optically acceptable, and the stable state and the second intermediate state The transition between and optically forbidden or has a transition time sufficiently longer than the relaxation time of the transition from the second intermediate state to the metastable state,
When the stored content is set to the stable state, an electromagnetic wave having a frequency corresponding to an energy difference between the metastable state and the first intermediate state is transferred from the first intermediate state to the stable state. Irradiate for a longer time than the relaxation time to
When the stored content is set to the metastable state, an electromagnetic wave having a frequency corresponding to an energy difference between the stable state and the first intermediate state is transferred from the first intermediate state to the metastable state. Irradiate for longer than the relaxation time to the state,
When the stored content is read, the organic molecular tissue is irradiated with an electromagnetic wave having a frequency corresponding to the energy difference between the stable state and the second intermediate state, and between the stable state and the second intermediate state. An arithmetic element integrated apparatus in which a plurality of arithmetic elements each including a plurality of storage elements arranged to measure whether or not fluorescence having a frequency corresponding to the energy difference is emitted is integrated. The arithmetic element integrated device according to claim 10, wherein the organic molecular organization has a ring structure. The arithmetic element integrated device according to claim 11, wherein the organic molecular organization is a porphyrin cyclic organization.

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