CN102156374A - Plasmon based device and method for realizing logic computation - Google Patents
Plasmon based device and method for realizing logic computation Download PDFInfo
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- CN102156374A CN102156374A CN 201110021040 CN201110021040A CN102156374A CN 102156374 A CN102156374 A CN 102156374A CN 201110021040 CN201110021040 CN 201110021040 CN 201110021040 A CN201110021040 A CN 201110021040A CN 102156374 A CN102156374 A CN 102156374A
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Abstract
The invention provides a plasmon based device and method for realizing logic computation. In the method, different structures are designed with a metal nanometer waveguide as a basic element; and an output light intensity is controlled through selecting a specific polarization and a phase of an input light signal. Therefore, a fundamental logic gate (like an AND gate, an OR gate and an NOT gate) and some other logic gates like an XOR, an NOR and an NAND can be obtained, and binary computation can be realized.
Description
Technical field
The present invention relates to a kind of method, particularly utilize the method for metal nano waveguide construction logic and computational grid based on surface phasmon construction logic and counter circuit.
Background technology
Along with the development of modern nanofabrication technique, transistorized quantity has approached its physics limit on the integrated circuit, and connectivity problem between the device and power problems become the key factor of restriction chip performance.Therefore explore the new material that can be used for information processing and method just becomes an important problem.Compare with electronics, photon has lot of advantages as the carrier of information, as high-speed, high bandwidth, high density etc.
Metal Nano structure can produce the collective oscillation of surface phasmon-free electron under the effect of incident light, surface phasmon can be along the nanometer duct propagation in the waveguide of one-dimensional metal nanometer.When the diameter of waveguide became smaller, Medium Wave Guide can not be strapped in energy in the waveguide, but the space outside waveguide has serious expansion.And the metal nano waveguide is because the characteristic of surface phasmon, and energy can be limited near the nanometer waveguide.The development of surface phasmon photonics in recent years makes it show the potentiality that are used for Information technology.
Summary of the invention
The invention provides a kind of: by the interference effect of the surface phasmon propagated in the metal nano waveguide based on the logic of phasmon and the implementation method of counter circuit, realize the reciprocity regulation and control of output signal strength in the excimer element, thereby realize basic logical operation and binary computations.Based on these logical operations, can realize more complicated calculating.
The objective of the invention is to be achieved through the following technical solutions:
According to a first aspect of the invention, provide a kind of device, comprise load module, computing module and output module based on phasmon realization logical calculated, wherein:
Described load module is made of an end of light source and the waveguide of one-dimensional metal nanometer, is used for the light of predetermined strength is input to computing module;
The ad hoc structure that described computing module is made up of the waveguide of a few strip metal nanometer is handled the signal of input by plasmon interference;
Described output module is made of the other end and the detector of one-dimensional metal nanometer waveguide, is used for the result of computing is exported and surveys.
In said apparatus, the waveguide of described one-dimensional metal nanometer is nano wire, nano belt or nanometer channel.
In said apparatus, the material of described one-dimensional metal nanometer waveguide be in gold, silver, platinum, copper and the aluminium any one or multiple.
In said apparatus, the waveguide of described one-dimensional metal nanometer is by chemical method or micro-nano manufacturing method preparation.
In said apparatus, the light source in the load module is a laser, electrically excited nanometers light.
In said apparatus, described chemical method is solution methods or gas phase process, and described micro-nano manufacturing method is photoetching, electron beam lithography, focused-ion-beam lithography or nano impression.
According to a first aspect of the invention, provide a kind of method based on phasmon realization logical calculated, wherein:
(1) device as claimed in claim 1 is the elementary cell that realizes logical calculated;
(2) intensity of the specific polarization of input optical signal and phase decision output signal;
(3) realize logical and or, non-, XOR, with non-or non-;
(4) realize binary calculating.
In said method, the modulation of input optical signal phase place is realized by the particular design to the metal nano waveguide length.
Compared with prior art, the invention has the advantages that:
The present invention realizes the transmission of light signal in the device network (integrated circuit, chip) by the metal nano waveguide, transmission when in same nanometer waveguide, can realize a plurality of optical signallings, can greatly reduce the quantity of line between the device, increase bandwidth, reduce power consumption, and can improve the speed of information transmission.
Inventive principle
Light can excite the surface phasmon in the metal Nano structure, and in the waveguide of one-dimensional metal nanometer, surface phasmon can be along the nanometer duct propagation.In communication process, surface phasmon forms certain Electric Field Distribution along the nanometer waveguide, imports the polarisation of light direction by changing, and the phase differential that changes two bundle exciting lights, can change the nanometer waveguide distribution of electric field on every side.In the branched structure or network formed by a plurality of nanometer waveguides, intensity and direction when in the nanometer waveguide, propagating, thereby the light intensity of control output by controlling the Electric Field Distribution in the nanometer waveguide, can controlling light.A certain light intensity value is set at threshold value, and output intensity is 0 during less than this threshold value, and output intensity is 1 during greater than this threshold value, and the control to being output as 0 or 1 has been arranged, and then can design various logic gates, realizes logical operation and more senior calculating.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail, wherein:
Fig. 1 a is according to the SEM figure of embodiments of the invention with the four-terminal device of nano silver wire structure;
Fig. 1 b is that example 1 realizes structural representation with door according to the present invention;
Fig. 2 is that example 2 realizes or the structural representation of door according to the present invention;
Fig. 3 is the structural representation that example 3 realizes not gate according to the present invention;
Fig. 4 is the structural representation that example 4 realizes XOR gate according to the present invention;
Fig. 5 is the structural representation that example 5 realizes rejection gate according to the present invention;
Fig. 6 is two kinds of structural representations that example 6 realizes Sheffer stroke gate according to the present invention;
Fig. 7 is the structural representation that example 7 realizes two bit totalizers according to the present invention;
Fig. 8 is the structural representation that example 8 realizes two bit subtracters according to the present invention.
Embodiment
Specifically, the invention provides a kind of device that adopts phasmon to realize logic computing function, this device comprises load module, computing module and output module.
Wherein, load module is made of an end of light source and the waveguide of one-dimensional metal nanometer, because the surface phasmon that mainly utilizes optical excitation and produced in the present invention is as propagation medium, therefore light source generally can select to excite the laser of the surface phasmon of metal Nano structure, the output light signal of electrically excited nanometers light and other devices.Described predetermined light intensity was meant before incident, those of ordinary skills set an intensity threshold at first as required, if incident intensity is less than this threshold value, then input signal is 0, if greater than this threshold value then, input signal is 1, and suitable light intensity incident is selected in the concrete logical operation that realizes according to expectation then.
The ad hoc structure that described computing module is made up of the waveguide of a few strip metal nanometer, chemical method or micro-nano manufacturing method (photoetching, electron beam lithography, focused-ion-beam lithography, nano impression etc.) preparation are generally adopted in the waveguide that this structure is used, comprise metal nanometer line, nano belt, nanometer channel, the material of described metal nano waveguide can in gold, silver, platinum, copper and the aluminium any one or multiple.In the present invention, the number of one-dimensional metal nanometer waveguide is generally at two or more, and lines up ad hoc structure (as shown in Figure 1a).This ad hoc structure generally can will utilize the prepared waveguide of chemical method to line up specific structure by equipment such as narishiges, also can directly utilize micro-nano process technology preparation to have the waveguide of ad hoc structure, described chemical method includes but not limited to solution methods and gas phase process, and described micro-nano manufacturing method includes but not limited to photoetching, electron beam lithography, focused-ion-beam lithography, nano impression.Mutual interference can take place in the phasmon that excites at different input ends, and the intensity that the result of interference causes exporting light signal can strengthen or weaken, and promptly output signal can be 1 or 0.For a specific structure, a certain specific input phase will produce a certain specific output 1 or 0.
This device also comprises output module, and its other end and detector by the waveguide of one-dimensional metal nanometer constitutes.Detector can be the photoelectric conversion device of microminiaturization or the load module of next stage logical compute device.
The present invention also provides a kind of and has realized the method for logic computing function based on phasmon, below specifies the several typical logic function that the device and method that utilizes the above embodiment of the present invention is realized by example.
Example 1 and 2:
Fig. 1 b is that example 1 realizes structural representation with door according to the present invention.Wherein Zhuan Zhi computing module is made of three nano wires 1 ' jointly.As shown in Figure 1, two bundle coherent lights respectively from the input of the left-hand end of top two nano wires, are referred to as input end 1 and input end 2, by selecting the specific polarization and the phase place of two-beam, light intensity that can the control output end.If definition is 1 more than or equal to some intensity levels, is 0 less than this intensity level, then can control and be output as 0 or 1, thereby realize logical and (AND, Fig. 1), logical OR (OR, Fig. 2).
Example 3 to 6:
If with an input end as control end, then can realize logic NOT (NOT, Fig. 3).Be output as 0 or 1 by changing the phase place of an input optical signal, can controlling, the change of phase place can realize by the length that changes the metal nano waveguide, is illustrated in figure 4 as and realizes XOR gate (XOR) in three terminal device.Sheffer stroke gate (NAND) and rejection gate (NOR) can be used as the various logic gates in the elementary cell structure electronics computing chip.It can by or door and with door on increase a control and bring in realization, shown in Fig. 5 and Fig. 6 (1).This structure in fact can be regarded as with door and or door respectively with the cascaded structure of not gate.By the signal intensity of modulation control end, also can realize the function of Sheffer stroke gate (NAND) by the structure shown in Fig. 6 (2).
Example 7 to 8:
In four-terminal device (two input ends, two output terminals), two outputs are defined as low level output terminal and high-order output terminal respectively, then can realize the addition (Fig. 7) and the subtraction (Fig. 8) of two one bits.In the subtraction of two one bits shown in Figure 8, the output of high-order output terminal can be used as the symbol or the borrow of operation result, and for example 0-1=(11) expression 0 subtracts 1 result and equals-1 or borrow one to more high-order minuend.Based on these basic logical blocks and plus and minus calculation unit, can construct and realize more complicated calculating.
Although the present invention is made specific descriptions with reference to the above embodiments, but for the person of ordinary skill of the art, should be appreciated that and to make amendment based on content disclosed by the invention within spirit of the present invention and the scope or improve not breaking away from, these modifications and improving all within spirit of the present invention and scope.
Claims (8)
1. realize the device of logical calculated based on phasmon, comprise load module, computing module and output module, wherein:
Described load module is made of an end of light source and the waveguide of one-dimensional metal nanometer, is used for the light of predetermined strength is input to computing module;
The ad hoc structure that described computing module is made up of the waveguide of a few strip metal nanometer is handled the signal of input by plasmon interference;
Described output module is made of the other end and the detector of one-dimensional metal nanometer waveguide, is used for the result of computing is exported and surveys.
2. device as claimed in claim 1 is characterized in that, the waveguide of described one-dimensional metal nanometer is nano wire, nano belt or nanometer channel.
3. device as claimed in claim 1 is characterized in that, the material of described one-dimensional metal nanometer waveguide be in gold, silver, platinum, copper and the aluminium any one or multiple.
4. device as claimed in claim 1 is characterized in that, the waveguide of described one-dimensional metal nanometer is by chemical method or micro-nano manufacturing method preparation.
5. device as claimed in claim 1 is characterized in that the light source in the load module is a laser, electrically excited nanometers light.
6. device as claimed in claim 4 is characterized in that, described chemical method is solution methods or gas phase process, and described micro-nano manufacturing method is photoetching, electron beam lithography, focused-ion-beam lithography or nano impression.
7. realize it is characterized in that the method for logical calculated based on phasmon for one kind:
(1) device as claimed in claim 1 is the elementary cell that realizes logical calculated;
(2) intensity of the specific polarization of input optical signal and phase decision output signal;
(3) realize logical and or, non-, XOR, with non-or non-;
(4) realize binary calculating.
8. method as claimed in claim 7 is characterized in that, the modulation of input optical signal phase place is realized by the particular design to the metal nano waveguide length.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793286A (en) * | 2015-05-11 | 2015-07-22 | 中国科学院半导体研究所 | Plasmon all-optical logic device based on open pore resonance coupling effect |
| CN115128881A (en) * | 2022-06-13 | 2022-09-30 | 苏州大学 | Multifunctional photoelectric logic gate based on single light source and single detector |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671020A (en) * | 2008-12-22 | 2010-03-17 | 中国科学院理化技术研究所 | Silicon nanowire-based fluorescence chemical logic switch and preparation method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671020A (en) * | 2008-12-22 | 2010-03-17 | 中国科学院理化技术研究所 | Silicon nanowire-based fluorescence chemical logic switch and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 《Nano Letters》 20101223 Hong Wei et al Quantum Dot-Based Local Field Imaging Reveals Plasmon-Based Interferometric Logic in Silver Nanowire Networks 第471页右栏第2段到第474页左栏第2段、表1和图1-3 1-8 第11卷, * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793286A (en) * | 2015-05-11 | 2015-07-22 | 中国科学院半导体研究所 | Plasmon all-optical logic device based on open pore resonance coupling effect |
| CN104793286B (en) * | 2015-05-11 | 2017-10-03 | 中国科学院半导体研究所 | Phasmon all-optical logic gates based on open pore resonance coupling effect |
| CN115128881A (en) * | 2022-06-13 | 2022-09-30 | 苏州大学 | Multifunctional photoelectric logic gate based on single light source and single detector |
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Application publication date: 20110817 |