WO2003028116A1 - Element de conversion ultra-rapide de signaux photoelectriques - Google Patents
Element de conversion ultra-rapide de signaux photoelectriques Download PDFInfo
- Publication number
- WO2003028116A1 WO2003028116A1 PCT/JP2002/009353 JP0209353W WO03028116A1 WO 2003028116 A1 WO2003028116 A1 WO 2003028116A1 JP 0209353 W JP0209353 W JP 0209353W WO 03028116 A1 WO03028116 A1 WO 03028116A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conversion device
- photoelectric conversion
- copper oxide
- detection unit
- light detection
- Prior art date
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 239000007790 solid phase Substances 0.000 claims abstract description 4
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 43
- 239000005751 Copper oxide Substances 0.000 claims description 20
- 229910000431 copper oxide Inorganic materials 0.000 claims description 20
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 239000012212 insulator Substances 0.000 claims description 9
- 229910000314 transition metal oxide Inorganic materials 0.000 claims description 8
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 6
- 150000002602 lanthanoids Chemical class 0.000 claims description 6
- 229910052746 lanthanum Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 5
- 229910052745 lead Inorganic materials 0.000 claims description 4
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- 239000012782 phase change material Substances 0.000 claims 1
- 239000010409 thin film Substances 0.000 abstract description 10
- 239000000758 substrate Substances 0.000 abstract description 7
- 230000007704 transition Effects 0.000 abstract description 7
- 239000010408 film Substances 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 10
- 238000004891 communication Methods 0.000 description 7
- 239000013078 crystal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 238000000608 laser ablation Methods 0.000 description 3
- 238000001451 molecular beam epitaxy Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010884 ion-beam technique Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 150000001602 bicycloalkyls Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N99/00—Subject matter not provided for in other groups of this subclass
- H10N99/03—Devices using Mott metal-insulator transition, e.g. field-effect transistor-like devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/08—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors
Definitions
- the present invention relates to a photoelectric conversion device, and in particular, a detection unit can respond to an optical signal on the order of picoseconds, and can follow an ON-OFF signal of terahertz (1 ( 2 2 )), and BACKGROUND OF THE INVENTION 1.
- a detection unit can respond to an optical signal on the order of picoseconds, and can follow an ON-OFF signal of terahertz (1 ( 2 2 )), and BACKGROUND OF THE INVENTION 1.
- Field of the Invention relates to an ultra-high-speed photoelectric conversion device suitable for integration.
- a photo diode using a ⁇ - ⁇ junction of a semiconductor or a photoconductive element that supplies light to a base portion of a ⁇ ⁇ ⁇ transistor to extract a collector current has been used as a photoelectric conversion element.
- the response speed of the Si-pin type (p + nn + ) photodiode which has a relatively fast response speed, is 270 pSec.
- the response speed of the Ge-pin type photodiode is 200 pSec. (LSI Handbook; Telecommunication Society p78).
- Optical communication using an optical fiber network can be used to transfer large-scale information at high speed, and is considered to be a major communication method for large-scale information communication in the future. For this purpose, it is necessary to raise the switching frequency by light to the limit. As for the pulse width of light, it is already possible to form pulses in the range of several tens of femtoseconds (10 to 14 ) seconds. However, since the light receiving and responding section is of the order of several lOOpSec as described above, this is a factor that limits the amount of light transmission information. In order to realize the transmission of large amounts of information, there is a strong demand for improvements in the response speed of photoelectric conversion elements.
- a photoelectric conversion device can be realized using a Mott insulator material in an ultrahigh-speed region of a terahertz region.
- processing after photoelectric conversion is performed by a device using a normal metal electrode.
- the metal resistance, the capacitance between wirings, or the space between wiring layers Due to the resulting parasitic capacitance, a speed delay is caused, and the challenge is to ensure the high speed of the entire device, including the electrodes and wiring.
- the above speed delay becomes a serious problem.
- An object of the present invention is to provide an ultra-high-speed photoelectric conversion device capable of responding to an optical signal on the order of picoseconds and capable of following an ON-OFF signal of terahertz. Disclosure of the invention
- the present invention is a photoelectric conversion device including a light detection portion, a pair of electrodes provided between the light detection portion, and a wiring material, wherein the light detection portion is made of a solid phase transfer material.
- the electrode and wiring material of the portion are made of a superconductive material.
- the superconducting material forming the electrode and the wiring material includes a metal superconducting material or a copper oxide.
- the copper oxide LnSrxBa 2 -xCu 3 0 6 + y (Ln is Y or lanthanide elements, x and y are 0 ⁇ ⁇ 1 ⁇ 5 and 0 ⁇ y ⁇ 2) or LnSr2Cu 3 -xMx06 + y (Ln Includes Y or lanthanide elements, ⁇ includes Tl, Pb, Bi, and X and y include 0 and x ⁇ l and 0 and y ⁇ 2).
- the phase transfer material is a Mott insulator, and the Mott insulator is a transition metal oxide.
- the transition metal oxide is a copper oxide
- the photoelectric conversion device uses a transition metal oxide in which a photoinduced insulator-to-metal transition occurs in the photodetection portion, and further uses a superconducting material for the electrode and the wiring material.
- the photodetector can respond to optical signals on the order of picoseconds, and can follow terahertz ON-OFF signals.
- FIG. 1 is a perspective view showing one embodiment of a photoelectric conversion device according to the present invention.
- FIG. 2 (a) shows Sr 2 used in the photodetector of the photoelectric conversion device of the present invention.
- Cu0 is a crystal structure diagram of a 3 or Ca 2 Cu0 3.
- Figure 2 (b) is a crystal structure diagram of LaSrAl 0 3 used in the substrate of the photoelectric signal conversion device of the present invention.
- Figure 2 (c) is an explanatory view of a stacked structure with the LaSrA10 4, Sr 2 CuOs Ca 2 Cu0 3, the lattice constant.
- FIG. 1 is a perspective view showing an embodiment of the photoelectric conversion device according to the present invention, in which a thin film portion 3 made of a solid phase transfer material is provided on a substrate 4 to form a light detection portion 5, A pair of electrodes 2 made of a superconducting material is formed with the photodetector 5 interposed therebetween.
- the light pulse 1 is detected by the thin film portion 3 made of a phase transfer material, which is the light detection portion 5, and the converted current pulse becomes a photoelectric signal.
- 6 is a constant voltage power supply.
- a Mott insulator As the stationary phase transfer material constituting the light detecting section 5, a Mott insulator can be used, and more specifically, a transition metal oxide can be used. In particular, it is a base material of a recent high-temperature superconducting material. Certain copper oxides may be used to advantage.
- FIG. 2 (a) shows the crystal structure of Sr 2 CuO 3 and Ca 2 Cu0 3, shows the lattice constants in FIG. 2 (c).
- Examples of the superconducting material constituting the pair of electrodes 2 provided with the photodetecting section 5 interposed therebetween include a metal superconducting material and a copper oxide.
- the metal superconducting material include Nb and Pb
- specific examples of the oxide include LnSrxBa 2 -xCu 3 O 6 + y (Ln is a Y or lanthanide element, x and y are 0 X ⁇ 1 and 0 x y x 2) and LnSr 2 Cu 3 -xMxO 6 + y (Ln is a Y or lanthanide element, ⁇ is l, Pb, Bi, X and y are 0 ⁇ x ⁇ 1 and 0 ⁇ y ⁇ 2).
- the wiring material is also described above. It is composed of a metal superconducting material or copper oxide which is the same superconducting material as the electrode.
- a metal superconducting material or copper oxide which is the same superconducting material as the electrode.
- an extremely high-quality Mott insulator is formed, which has a small lattice mismatch with the transition metal oxide constituting the photodetection portion 5 that causes the photoinduced insulator-metal transition.
- LaSrAlO 4 that can be used.
- LaSrA10 4 the lattice constant of the second view (in c) shows the laminated structure of the lattice constant and the transition metal oxide.
- LaSrAl 4 the light shown in FIG. 2 (a) it can be seen that approximates the lattice constant of Sr 2 CuO 3 or Ca 2 Cu0 3 constituting the detection unit 5.
- the substrate 4, the thin film part 3, forms formed using conventional molecular beam epitaxy (MBE) method
- MBE molecular beam epitaxy
- the electrodes and wiring materials are formed on the light detecting section by a focused ion beam (FIB) method using a superconducting material.
- FIB focused ion beam
- the photoelectric conversion device performs photoelectric conversion using the insulator-metal transition in the photodetection section, it can respond on the order of picoseconds. Since the wire material is composed of superconducting material, it is possible to follow the terahertz ON-OFF signal.
- An actual opto-electric signal conversion device is composed of a large-scale arithmetic circuit centering on the opto-electric signal conversion element group.
- the signal converted from the light into the electric signal can have a resistance even when routed through a large-scale wiring or circuit. Since the component becomes zero, it is possible to propagate without signal delay.
- LaSrAlO 4 was used as a substrate, and a Sr 2 CuO 3 thin film was formed thereon as a photodetector by laser-brasion MBE.
- Nb metal film is formed on this thin film with a sputtering device, and a normal photolithography E, electrodes were formed by etching technology. Further, a LaAlO 3 film was laminated as a protective film by a laser ablation method, thereby producing a photoelectric conversion device shown in FIG.
- the photoelectric conversion element was cooled to a liquid He temperature of 4.2K, and the optical response was observed, confirming that the response was in the picosecond order.
- Example 1 After the formation of the Sr 2 CuO 3 thin film on the LaSrA10 4 substrate to form a Yba 2 Cu 3 0 7 thin copper oxide superconducting material. Then was only Yba 2 Cu 3 O 7 films on Sr 2 Cu0 3 film serving as a light detecting portion was peeled using a FIB method. In this case it was peeled by irradiating Yba 2 Cu 3 0 7 thin ion beam from the side in order to reduce damage to the light detecting portion by FIB bicycloalkyl over beam. At this time, the Sr 2 CuO 3 film having a thickness of about several nm is peeled off, but there is no problem in functioning as a light detecting portion. This is because the penetration length of light is about that wavelength. The electrodes and the light detecting section were formed as described above. Furthermore, a LaAlOs film was laminated as a protective film by a laser ablation method.
- the photoelectric conversion element was cooled to a temperature of 77 K with liquid nitrogen, and the optical response was observed.
- the signal intensity of the obtained device was slightly weaker than the device of Example 1 using an Nb metal film as an electrode, but it was confirmed that the device operated without any problem.
- the present invention provides an opto-electrical signal conversion device utilizing transition from an insulator to a metal.
- This ultra-high-speed photoelectric signal conversion phenomenon can be ensured by using a superconducting material not only for the light detection unit but also for the electrodes and wiring materials. Since these light-induced insulator-metal transition materials and superconducting materials are relatively stable materials, they can be combined with Si semiconductors. In particular, copper oxide superconducting materials Superconductivity can be relatively easily achieved by low-temperature means, which provides a great advantage in practical use. Further, the above-mentioned copper oxide superconducting material is familiar with Si materials.
- the photoelectric conversion device of the present invention may play a central role in the optical communication information industry, which will play a leading role as information communication means in the future. In particular, it will have an immeasurable effect as a bridge between ultrahigh-speed optical communication in the terahertz range and ultrahigh-speed operation of ultrahigh-speed Si semiconductors and GaAs semiconductors whose gates are miniaturized below O.lJUm. Be expected.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Light Receiving Elements (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Solid State Image Pick-Up Elements (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/488,931 US20050012029A1 (en) | 2001-09-14 | 2002-09-12 | Ultra high-speed photoelectric signal conversion element |
EP02767957A EP1427028A4 (en) | 2001-09-14 | 2002-09-12 | ULTRA-RAPID CONVERSION ELEMENT OF PHOTOELECTRIC SIGNALS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001/279311 | 2001-09-14 | ||
JP2001279311A JP3511098B2 (ja) | 2001-09-14 | 2001-09-14 | 超高速光電気信号変換素子 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003028116A1 true WO2003028116A1 (fr) | 2003-04-03 |
Family
ID=19103533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/009353 WO2003028116A1 (fr) | 2001-09-14 | 2002-09-12 | Element de conversion ultra-rapide de signaux photoelectriques |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050012029A1 (ja) |
EP (1) | EP1427028A4 (ja) |
JP (1) | JP3511098B2 (ja) |
WO (1) | WO2003028116A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011228360A (ja) * | 2010-04-15 | 2011-11-10 | Institute Of Physical & Chemical Research | 太陽電池 |
WO2015070025A1 (en) * | 2013-11-08 | 2015-05-14 | Ubc Late Stage, Inc. | Document analysis and processing systems and methods |
KR101644794B1 (ko) | 2014-12-02 | 2016-08-12 | 광주과학기술원 | 광전도 반도체 스위치 및 그 스위치의 제조방법 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0418775A (ja) * | 1990-05-11 | 1992-01-22 | Tokyo Univ | 超伝導性光伝導基本物質Cu2O系材料を用いた超伝導オプトエレクトロニクス装置 |
EP0508060A2 (en) * | 1991-02-12 | 1992-10-14 | NGK Spark Plug Co. Ltd. | Method of forming oxide superconducting films and oxide superconducting members having said films |
JPH05335609A (ja) * | 1992-06-03 | 1993-12-17 | Matsushita Electric Ind Co Ltd | 薄膜光電変換素子およびその製造方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR910002311B1 (ko) * | 1987-02-27 | 1991-04-11 | 가부시기가이샤 히다찌세이사꾸쇼 | 초전도 디바이스 |
EP0291050A3 (en) * | 1987-05-15 | 1989-09-27 | Hitachi, Ltd. | Superconducting device |
US4990487A (en) * | 1988-03-11 | 1991-02-05 | The University Of Tokyo | Superconductive optoelectronic devices |
JPH03137018A (ja) * | 1989-10-20 | 1991-06-11 | Hitachi Ltd | 酸化物系高温超電導体 |
JP2503091B2 (ja) * | 1990-03-14 | 1996-06-05 | 富士通株式会社 | 超電導光機能素子 |
EP0460356A3 (en) * | 1990-06-06 | 1992-11-04 | International Business Machines Corporation | Contacts to semiconductors having zero resistance |
CA2062294C (en) * | 1991-03-04 | 1997-01-14 | Hiroshi Inada | Thin film of oxide superconductor possessing locally different crystal orientations and processes for preparing the same |
US5432356A (en) * | 1993-04-02 | 1995-07-11 | Fujitsu Limited | Semiconductor heterojunction floating layer memory device and method for storing information in the same |
JP2963614B2 (ja) * | 1994-04-01 | 1999-10-18 | 財団法人国際超電導産業技術研究センター | 酸化物超電導体接合素子の製造方法 |
JP3012902B2 (ja) * | 1997-03-18 | 2000-02-28 | 工業技術院長 | 光誘起相転移を用いたスイッチング素子及びメモリー素子 |
JPH11346010A (ja) * | 1998-03-30 | 1999-12-14 | Sharp Corp | 光検出素子 |
-
2001
- 2001-09-14 JP JP2001279311A patent/JP3511098B2/ja not_active Expired - Lifetime
-
2002
- 2002-09-12 WO PCT/JP2002/009353 patent/WO2003028116A1/ja active Application Filing
- 2002-09-12 US US10/488,931 patent/US20050012029A1/en not_active Abandoned
- 2002-09-12 EP EP02767957A patent/EP1427028A4/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0418775A (ja) * | 1990-05-11 | 1992-01-22 | Tokyo Univ | 超伝導性光伝導基本物質Cu2O系材料を用いた超伝導オプトエレクトロニクス装置 |
EP0508060A2 (en) * | 1991-02-12 | 1992-10-14 | NGK Spark Plug Co. Ltd. | Method of forming oxide superconducting films and oxide superconducting members having said films |
JPH05335609A (ja) * | 1992-06-03 | 1993-12-17 | Matsushita Electric Ind Co Ltd | 薄膜光電変換素子およびその製造方法 |
Non-Patent Citations (4)
Title |
---|
ASAMITSU A. ET AL., NATURE, vol. 373, 2 February 1995 (1995-02-02), pages 407 - 409, XP002957364 * |
MEETING ABSTRACTS OF THE PHYSICAL SOCIETY OF JAPAN, no. PART 4, 3 September 2001 (2001-09-03), pages 619, 19RE-5, XP002957363 * |
See also references of EP1427028A4 * |
TOKURA Y. ET AL., JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, vol. 63, no. 11, November 1994 (1994-11-01), pages 3931 - 3935, XP002957365 * |
Also Published As
Publication number | Publication date |
---|---|
US20050012029A1 (en) | 2005-01-20 |
JP3511098B2 (ja) | 2004-03-29 |
EP1427028A4 (en) | 2009-08-12 |
JP2003086824A (ja) | 2003-03-20 |
EP1427028A1 (en) | 2004-06-09 |
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