Ultrafast microspectroscopy of wide band-gap semiconductor nanocrystals.

宽带隙半导体纳米晶体的超快显微光谱。

• 批准号: 10490004
• 负责人: EDAMATSU Keiichi
• 金额: $ 6.85万
• 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: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10490004/
• 关键词: Nanocrystal; Quantum dot; Semiconductor nanostructure; Microspectroscopy; Ultrafast spectroscopy; Single quantum dot; 走査型近接場顕微鏡

We have investigated various optical properties of semiconductor nanocrystals (quantum dots) including I-VII (CuCl), II-VI (CdSe/ZnCdSe), and III-V (GaAs/AlGaAs) materials. Especially, ultrafast dynamics of an exciton and exciton complexes confined in a single quantum dot have been investigated by means of time-resolved micro-photoluminescence spectroscopy. Topics of this research are listed below.1. Non-markovian relaxation of excitons confined in CuCl quantum dots.2. Transient excited-state absorption of CuCl quantum dots.3. Two-photon excitation spectroscopy of CuCl quantum dots.4. Micro-photoluminescence spectroscopy of single CuCl quantum dots.5. Time-resolved micro-photoluminescence spectroscopy of single ZnCdSe quantum dots.6. Homogeneous linewidth of the resonant luminescence of CuCl quantum dots.7. Micro-photoluminescence and multiexciton states of a single GaAs quantum dots.

我们研究了半导体纳米晶体（量子点）的各种光学特性，包括 I-VII (CuCl)、II-VI (CdSe/ZnCdSe) 和 III-V (GaAs/AlGaAs) 材料。特别是，通过时间分辨微光致发光光谱研究了限制在单个量子点中的激子和激子复合物的超快动力学。本研究的课题如下： 1． CuCl量子点中激子的非马尔可夫弛豫2． CuCl量子点的瞬态激发态吸收3． CuCl量子点的双光子激发光谱。 4．单CuCl量子点的显微光致发光光谱。5．单ZnCdSe量子点的时间分辨微光致发光光谱。6． CuCl量子点共振发光的均匀线宽。7．单个 GaAs 量子点的微光致发光和多激子态。

项目成果

T. Uozumi: "Excited-state absorption of excitons confined in spherical quantum dots"Physical Review B. 59. 9826-9829 (1999)

T. Uozumi：“限制在球形量子点中的激子的激发态吸收”物理评论 B. 59. 9826-9829 (1999)

K. Edamatsu: "Two-photon excitation spectra of confined excitons in CuCl nanocrystals"Physical Review B. 59. 15868-15871 (1999)

K. Edamatsu：“CuCl 纳米晶体中受限激子的双光子激发光谱”物理评论 B. 59. 15868-15871 (1999)

T. Uozumi, Y. Kayanuma, K. Yamanaka, K. Edamatsu, and T. Itoh: "Excited-state absorption of excitons confined in spherical quantum dots."Physical Review B. 59. 9826-9829 (1999)

T. Uozumi、Y. Kayanuma、K. Yamanaka、K. Edamatsu 和 T. Itoh：“限制在球形量子点中的激子的激发态吸收。”物理评论 B. 59. 9826-9829 (1999)

K. Edamatsu: "Non-markovian relaxation of excitons confined in CuCl quantum dots studied by resonant secondary emission"Physica Status Solidi (b). 178(印刷中). (2000)

K. Edamatsu：“通过共振二次发射研究了 CuCl 量子点中激子的非马可夫弛豫”Physica Status Solidi (b) 178（出版中）。

K. Edamatsu, K. Hisakawa, and T. Itoh: "Two-photon excitation spectra of confined excitons in CuCl nanocrystals."Physical Review B. 59. 15868-15871 (1999)

K. Edamatsu、K. Hisakawa 和 T. Itoh：“CuCl 纳米晶体中受限激子的双光子激发光谱。”物理评论 B. 59. 15868-15871 (1999)