Dynamical Study of Photoexcited States in Semiconductors by Means of Femtosecond Pump-and-Probe Spectroscopy

利用飞秒泵浦探针光谱法进行半导体光激发态的动力学研究

• 批准号: 03402007
• 负责人: MASUMOTO Yasuaki
• 金额: $ 16.58万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03402007/
• 关键词: Femtosecond; Pump-and-Probe Spectroscopy; Nonequilibrium Electron Distribution; Exciton; Coherent Phonon; Quantum Beat; Type-II Quantum Well; Excitonic Polariton; ZnP_2; フェムト秒時間分解分光; ワニエ励起子; ポラリトン; チタンサファイアレーザー; ポラリトン量子ビート; 光学非線形性; AlGaAsーA

<Observation of nonequilibrium electrons in CdSe> Femtosecond pump-and-probe spectroscopy was applied to highly excited CdSe. Nonequilibrium distribution of electrons was observed for 50 fs. <Exciton-hole collision in type-II AlGaAs-AlAs quantum wells> Exciton-hole collision rate was measured by means of time-resolved degenerate four-wave mixing. Phase relaxation of excitons is dominated by the collision between the excitons and long-lived holes. <Observation of coherent optical phonons in BiI_3> Resonant coherent lattice vibrations in the vicinity of the indirect absorption edge in a BiI_3 lattice crystal are observed in a femtosecond pump-and-probe experiment. The coherent transverse optical lattice vibration, which has a period of 300 fs, continues for more than 100 cycles. <Quantum beats of Wannier excitons and excitonic polaritons> Quantum beats of Wannier excitons and excitonic polaritons were observed in ZnP_2. Qunatum beat originates from Wannier excitons whose principal quantum numbers n are 2,3 and 4. Polariton quantum beat was also observed as a result of interference of both upper and lower polaritons around the n =1 resonance.

<将CDSE>飞秒泵和探针光谱中非平衡电子的观察应用于高度激发的CDSE。观察到50 fs的电子的非平衡分布。 <II型藻类 - alas-Alas量子井中的激子孔碰撞>激子孔碰撞速率是通过时间分辨退化的四波混合量来测量的。激子的相位松弛由激子和长孔之间的碰撞支配。 <在BII_3晶格晶体中，在BII_3> BII_3>在间接吸收边缘附近的谐振相干晶格振动中观察相一致的相干晶格振动。具有300 fs的相干横向光学晶格振动继续进行100多个周期。在Znp_2中观察到了wannier激子和激子极性量的量子量子>量子的量子。 Qunatum Beat来自Wannier激子，其主量子数为2,3和4。由于n = 1共振周围的上和下极化子的干扰，也观察到了极性量子量子。

项目成果

F.Sasaki, T.Mishina and Y.masumoto: "Ultrafast Pump-and-Probe Spectroscopy in CdSe: Hot Carrier and Exciton Dynamics" Phys.Rev.B 46. 6750 (1992)

F.Sasaki、T.Mishina 和 Y.masumoto：“CdSe 中的超快泵浦探针光谱：热载流子和激子动力学” Phys.Rev.B 46. 6750 (1992)

Y.Masumoto: "Band Gap Renormalization and Pptical Gain Formation in Highly Excited CdSe" Journal of Crystal Growth. 117. 732-737 (1992)

Y.Masumoto：“高激发 CdSe 中的带隙重整和光电增益形成”晶体生长杂志。

Fumio Sasaki: "Ultrafast PumpーandーProbe Spectroscopy in Cdse:Hot Carrier and Exciton Dynamics" Physical Review B.

Fumio Sasaki：“Cdse 中的超快泵浦探针光谱：热载流子和激子动力学”物理评论 B。

Fumio Sasaki: "Nonequilibrium Distribution of Hot Carriers in a CdSe Thin Film" Superlattices and Microstructures.

Fumio Sasaki：“CdSe 薄膜中热载流子的非平衡分布”超晶格和微结构。

T.Kawazoe: "Spin Relaxation Process of Holes in Type II Al0.34Ga0.66As/AlAs Multiple Quantum Wells" Physical Review B.

T.Kawazoe：“II型Al0.34Ga0.66As/AlAs多量子阱中空穴的自旋弛豫过程”物理评论B。