2001 Fiscal Year Final Research Report Summary
Construction of sub-terahertz spectroscopic system using incoherent light source
| Project/Area Number |
11450031
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Osaka University |
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Principal Investigator |
HANGYO Masanori Research Center for Superconductor Photonics, Osaka University, Professor, 超伝導フォトニクス研究センター, 教授 (10144429)
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| Co-Investigator(Kenkyū-buntansha) |
TONOUCHI Masayoshi Research Center for Superconductor Photonics, Osaka University, Professor, 超伝導フォトニクス研究センター, 教授 (40207593)
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| Project Period (FY) |
1999 – 2000
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| Keywords | sub-terahertz wave / incoherent light source / photoconductive switch / laser diode / time domain spectroscopy / cross-correlation / semiconductor characterization / complex refractive index |
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| Research Abstract |
The purpose of this study is to construct sub-terahertz spectroscopic system using a compact and cheap incoherent light source and to demonstrate its usefulness. First, we constructed a system composed of a continuous wave multimode laser diode (CWMLD) and a low-temperature-grown GaAs (LT-GaAs) photoconductive switch, which work as an sub-THz emitter, and a Martin-Puplett type interferometer and bolometer. The usefulness of the system was verified by measuring transmittance of doped silicon wafers. Next, we constructed new spectroscopic system consisting of a CWMLD and two photoconductive switches, which are used for an emitter and a detector. By measuring the complex refractive index of doped silicon wafers, it is proved that this cheep and compact system is equivalent with a system using an expensive ultrashort laser.
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