2013 Fiscal Year Final Research Report
Fabrication of a pump-probe terahertz emission microscope and investigation of ultrafast electronic devices
| Project/Area Number |
23246066
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Osaka University |
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Principal Investigator |
MURAKAMI Hironaru 大阪大学, レーザーエネルギー学研究センタ, 准教授 (30219901)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAYAMA Iwao 大阪大学, レーザーエネルギー学研究センター, 准教授 (10332264)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | テラヘルツ / 近接場光 / 顕微鏡 / 原子間力顕微鏡 / フェムト秒レーザー / 半導体光スイッチ |
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| Research Abstract |
We have fabricated a near field excitation laser terahertz emission microscope (LTEM) combined with an atomic force microscope (AFM) in order to evaluate optoelectronic devices with fine structures. In the combined system we introduced a special AFM cantilever with a narrow aperture of about 500 nm into an optical path of excitation femtosecond pulsed laser to generate near-field light to excite terahertz wave pulses. Using the fabricated system, we have succeeded in the generation of terahertz wave pulse from a bowtie antenna fabricated on a low temperature grown GaAs (LT-GaAs) by near field light excitation, and also succeeded in the simultaneous observation of LTEM and AFM images.
On the other hand, we have also succeeded in the high-sensitive detection of terahertz wave pulse by optimizing the antenna structure of photoconductive terahertz detector fabricated on LT-GaAs.
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