Micro-probing system of coherent phenomena in THz frequency region

太赫兹频段相干现象微探测系统

• 批准号: 12554010
• 负责人: MIZOGUCHI Kohji
• 金额: $ 8.77万
• 依托单位: Osaka City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12554010/
• 关键词: pump-probe; semiconductor superlattice; phonon wave-pecket; coherent phonon; マイクロポンプ・プローブ; テラヘルツ; コヒーレントフォン; マイクロプロービング; ウムクラップ過程

We have constructed micro-probing characterization system of coherent system of coherent phenomena in THz frequency region because of investigations of semiconductor matenials and its devices by utilizing the time-resolved study of coherent phonons and photo-excited carriers. We obtain research results as follows1. Trial construction of two-color pump-probe system We have constructed two-color pump-probe system by using second or third harmonic generation light at the first year. The time resolution of this system is less than 100 fs2. Trial construction of micro-pump-probe system. The resolution of constructed micro-pump-probe system is about 2.7 um* under the condition that the numerical aperture of an objective lens used is 0.55 and the wavalength of the laser pulse is 810 nm. This result is almost consistent with the calculated resolution under the diffraction limit. Moreover, the pulse width on the sample using the micro-pump-probe system is less than 100 fs. These results demonstrate that the micro-pump-probe system constructed in the present work enable us to investigate the coherent phonon and superlattices3. Characterization of various sample by using a micro-probing characterization system We have performed the time-resolved study of the coherent phonons, their wave packet, and photo-excaited carriers in semiconductors and superlattices by using the micro-probing characterization system

基于对半导体材料及其器件的研究，利用相干声子和光激发载流子的时间分辨研究，我们建立了太赫兹频率范围内相干现象相干系统的微探测表征系统。取得了如下研究成果1.双色泵浦-探测系统的初步构建我们在第一年利用二次或三次谐波产生光构建了双色泵浦-探测系统。该系统的时间分辨率小于100 fs ~ 2。微型泵-探针系统的试制。在物镜透镜的数值孔径为0.55，激光脉冲波长为810 nm的条件下，所构建的微泵浦-探测系统的分辨率约为2.7 μ m。这一结果与衍射极限下的计算分辨率基本一致。此外，使用微泵浦-探测系统的样品上的脉冲宽度小于100 fs。这些结果表明，在本工作中构建的微泵浦探测系统，使我们能够研究相干声子和超晶格3。利用微探针表征系统对各种样品进行表征我们利用微探针表征系统对半导体和超晶格中的相干声子、相干声子波包和光致载流子进行了时间分辨研究

项目成果

H. Takeuchi, K. Mizoguchi, M. Nakayama, K. Kuroyanagi, T. Aida, M. Nakajima, and H. Harima: "Simultaneous Observation of Coherent GaSb-like and AlSb-like Longitudinal Optical Phonons in GaSb/AlSb superlattices"J. Phys. Soc. Jpn.. 70. 2598-2602 (2001)

H. Takeuchi、K. Mizoguchi、M. Nakayama、K. Kuroyanagi、T. Aida、M. Nakajima 和 H. Harima：“同时观察 GaSb/AlSb 超晶格中相干 GaSb 类和 AlSb 类纵向光学声子”

Tanaka, K. Mizoguchi and M. Nakayama: "Quantum beat between heavy-hole and light-hole excitons in Cul thin films"J. Lumin. 94-95. 385-388 (2001)

Tanaka、K. Mizoguchi 和 M. Nakayama：“Cul 薄膜中重空穴和轻空穴激子之间的量子拍动”J.

K. Mizoguchi, H. Takeuchi, T. Hino and M. Nakayama: "Finite-size effect on coherent folded acaustic phonons from GaAs/AlAs superlattices"J. Phys. Condens. Matter. 14. L103-L109 (2002)

K. Mizoguchi、H. Takeuchi、T. Hino 和 M. Nakayama：“来自 GaAs/AlAs 超晶格的相干折叠声子的有限尺寸效应”J。

H. Hase, M. Kitajima, S. Nakashima and K. Mizoguchi: "Dynamics of coherent anharmonic phonons in intensely photoexcited bismuth"Phys. Rev. Left.. 88. 06740(1-4) (2002)

H. Hase、M. Kitajima、S. Nakashima 和 K. Mizoguchi：“强光激发铋中相干非谐声子的动力学”Phys。

K.Mizoguchi, H.Takeuchi, T.Hino, M.Nakayama: "Finite-size effect on coherent folded acoustic phonons from GaAs/AlAs superlattices"J. Phys. Condens. Matter. 14. L103-L109 (2002)

K.Mizoguchi、H.Takeuchi、T.Hino、M.Nakayama：“来自 GaAs/AlAs 超晶格的相干折叠声子的有限尺寸效应”J。