Study of light-induced excitation dynamics in semiconductor nanostructures using ultrafast imaging microspectroscopy

使用超快成像显微光谱研究半导体纳米结构中的光致激发动力学

• 批准号: 13440095
• 负责人: EDAMATSU Keiichi
• 金额: $ 1.28万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13440095/
• 关键词: Nanocrystl; Quantum dot; Semiconductor nanostructure; Microspectroscopy; Ultrafast spectroscopy; Nonlinear spectroscopy

(1) Development of the ultrafast imaging microspectroscopy systemWe have developed the system for optical investigation of light-induced dynamics in semiconductor nanostructures. The system is composed of an imaging microscope and a timeresolving laser facility based on optical parametric amplifiers. The microscope has active-feedback-controlled translation stages, establishing high spatial resolution (~ 1?m) and long-term stability. The timefesolving optical system has a picosecond temporal response (~ 2ps) using optical Kerr shutter technique with CS_2 as a Kerr medium.(2) Optical investigation of semiconductor nanostructuresWe have investigated the optical properties of various semiconductor nanostructures as follows.・ Multiexciton states and extraordinary anti-Stokes luminescence of GaAs/AlGaAs quantum dots.・ Transient excited-state absorption of excitons and biexcitons confined in CuCl quantum dots.・ MBE growth of CuCl thin fikns/nanostructures and their optical properties.

(1)超快成像微光谱系统的发展我们开发了用于半导体纳米结构中光致动力学的光学研究系统。该系统由成像显微镜和基于光参量放大器的时间分辨激光装置组成。该显微镜具有主动反馈控制的平移台，可建立高空间分辨率(~ 1？M)和长期稳定。采用光学克尔快门技术，以CS_2为克尔介质的时间分辨光学系统具有皮秒级的时间响应（~ 2ps）。(2)半导体纳米结构的光学研究我们对各种半导体纳米结构的光学性质进行了如下研究。·GaAs/AlGaAs量子点的多激子态和非凡的反斯托克斯发光。CuCl量子点中激子和双激子的瞬时激发态吸收。CuCl薄膜/纳米结构的MBE生长及其光学性质。

项目成果

K.Edamatsu: "Resonant excitation and anti-Stokes luminescence of GaAs/AlGaAs single quantum dots"Journal of Luminescence. 94-95. 143-146 (2001)

K.Edamatsu：“GaAs/AlGaAs 单量子点的共振激发和反斯托克斯发光”发光杂志。

K.Edamatsu, C.Watatani, T.Itoh, S.Shimomura, and S.Hiyamizu: "Multiexciton dynamics of GaAs single quantum dots"Physics, Chemistry and Application of Nanostructures, World Scientific. 22-29 (2001)

K.Edamatsu、C.Watatani、T.Itoh、S.Shimomura 和 S.Hiyamizu：“GaAs 单量子点的多激子动力学”物理、化学和纳米结构应用，世界科学。

K.Edamatsu: "Homogencous lincwidths and confined-phonon sidebands of the resonant exciton luminescence of CuCl quantum dots"Physical Review B. 64. 195317/1-195317/5 (2001)

K.Edamatsu：“CuCl量子点共振激子发光的均匀线宽和受限声子边带”物理评论 B.64. 195317/1-195317/5 (2001)

R.Shimizu: "Quantum interference and diffraction of parametric down-converted biphotons"Pramana Journal of Physics. 59. 165-168 (2002)

R.Shimizu：“参量下转换双光子的量子干涉和衍射”Pramana 物理学杂志。

T.Itoh: "Photophysics of confined excitons in CuCl nanoparticles -Confinement of exciton excited states-"Int.J.Mod.Phys. B. 15. 3569-3573 (2001)

T.Itoh：“CuCl 纳米颗粒中受限激子的光物理学 - 激子激发态的限制 -”Int.J.Mod.Phys。