Coherent acoustic phonons in nanostructures

机译：纳米结构中的相干声子

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Phonons are considered as a most important origin of scattering and dissipation for electronic coherence in nanostructures. The generation of coherent acoustic phonons with femtosecond laser pulses opens the possibility to control phonon dynamics in amplitude and phase. We demonstrate a new experimental technique based on two synchronized femtosecond lasers with GHz repetition rate to study the dynamics of coherently generated acoustic phonons in semiconductor heterostructures with high sensitivity. High-speed synchronous optical sampling (ASOPS) enables to scan a time-delay of 1 ns with 100 fs time resolution with a frequency in the kHz range without a moving part in the set-up. We investigate the dynamics of coherent zone-folded acoustic phonons in semiconductor superlattices (GaAs/AlAs and GaSb/InAs) and of coherent vibration of metallic nanostructures of non-spherical shape using ASOPS.

机译：声子被认为是纳米结构中电子相干性散射和耗散的最重要来源。用飞秒激光脉冲产生相干声子，可以控制声子在振幅和相位方面的动力学。我们演示了一种新的实验技术，该技术基于两个具有GHz重复频率的同步飞秒激光器，以高灵敏度研究半导体异质结构中相干产生的声子的动力学。高速同步光学采样（ASOPS）能够以kHz范围内的频率以100 fs的时间分辨率扫描1 ns的时延，而装置中没有移动部件。我们研究了半导体超晶格（GaAs / AlAs和GaSb / InAs）中相干区域折叠声子的动力学以及使用ASOPS的非球形金属纳米结构的相干振动。

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来源
《Conference on Ultrafast Phenomena in Semiconductors and Nanostructure Materials; 20080120-23; San Jose,CA(US)》|2008年|P.iviii|共2页
会议地点 San JoseCA(US)
作者
T. Dekorsy; R. Taubert; F. Hudert; A. Bartels; A. Habenicht; F. Merkt; P. Leiderer; K Koehler; J. Schmitz; J Wagner;
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作者单位

Physics Department and Center for Applied Photonics, University Konstanz, Box M700, D-78457 Konstanz, Germany;

Fraunhofer Institute fuer Angewandte Festkoerperphysik, Tullastr. 72, D-79108 Freiburg, Germany;

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正文语种 eng
中图分类材料;
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femtosecond spectroscopy; coherent phonons; asynchronous optical sampling; picosecond ultrasonics; metallic nanoparticles; nanomechanical systems;

机译：飞秒光谱；相干声子；异步光学采样；皮秒超声；金属纳米粒子；纳米机械系统;

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专利

1. Coherent Phonon Transport Measurement and Controlled Acoustic Excitations Using Tunable Acoustic Phonon Source in GHz-sub THz Range with Variable Bandwidth [J] . Xiaohan Shen, Zonghuan Lu, Yukta P. Timalsina, Scientific reports. . 2018,第1期

机译：使用可变带宽的GHz-Sub THz系列中使用可调谐声学声子源的相干声子传输测量和控制声激发
2. Electron–acoustic phonon coupling in single crystal CH₃NH₃PbI₃ perovskites revealed by coherent acoustic phonons [J] . Pierre-Adrien Mante, Constantinos C. Stoumpos, Mercouri G. Kanatzidis, Nature Communications . 2017,第1期

机译：相干声子揭示的单晶CH _{3 NH _{3 PbI _{3 钙钛矿中的电子声声子耦合}}}
3. Anisotropic Electron-Phonon Coupling in Colloidal Layered TiS2 Nanodiscs Observed via Coherent Acoustic Phonons [J] . Rossi Daniel, Camacho-Forero Luis E., Ramos-Sanchez Guadalupe, The journal of physical chemistry, C. Nanomaterials and interfaces . 2015,第13期

机译：通过相干声子观察到的胶体层状TiS2纳米圆盘中的各向异性电子-声子耦合。
4. Coherent acoustic phonons in nanostructures [C] . T. Dekorsy, R. Taubert, F. Hudert, Conference on Ultrafast Phenomena in Semiconductors and Nanostructure Materials . 2008

机译：纳米结构中的相干声学声子
5. Studies of radiation damaged gallium arsenide using coherent acoustic phonon spectroscopy. [D] . Steigerwald, Andrew David. 2010

机译：用相干声子光谱研究辐射损伤的砷化镓。
6. Coherent Phonon Transport Measurement and Controlled Acoustic Excitations Using Tunable Acoustic Phonon Source in GHz-sub THz Range with Variable Bandwidth [O] . Xiaohan Shen, Zonghuan Lu, Yukta P. Timalsina, -1

机译：使用可调带宽的GHz-sub THz范围内的可调声子源进行相干声子传输测量和受控声激发
7. Coherent acoustic phonons in nanostructures investigated by asynchronous optical sampling [O] . Dekorsy, T., Hudert, F., Cerna, R., 2006

机译：通过异步光学采样研究纳米结构中的相干声学声子
8. Depth-Dependent Defect Studies Using Coherent Acoustic Phonons. [R] . Corder, S. G., Tolk, N. 2014

机译：使用相干声学声子的深度相关缺陷研究。

Coherent acoustic phonons in nanostructures

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