Optical modulation of low-dimensional semiconductor structures by surface acoustic waves

通过表面声波对低维半导体结构进行光调制

• 批准号: 5249806
• 负责人: Dr. Paulo V. Santos
• 金额: --
• 依托单位: Paul-Drude-Institut für Festkörperelektronik (PDI)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2000
• 资助国家: 德国
• 起止时间: 1999-12-31 至 2003-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5249806?language=en
• 关键词: Optical; modulation; low; dimensional; semiconductor

This project aims at the investigation of the interaction between high-frequency surface acoustic waves (SAWs) and low-dimensional semiconductos structures. The wavelengths (comparable to the carrier diffusion lengths) and time periods (comparable to the typical lifetime of photogenerated carriers) of these high-frequency SAWs are expected to lead to new interesting physical phenomena in quantum wells, quantum wires and quantum dots. These studies will be performed using spectroscopic techniques with high lateral resolution (smaller than 1µm) and with time resolution below the SAW oscillation period (0.5 to 10 ns). In this way, we will be able to locally probe the dynamic aspects of the interaction between SAWs and the band structure. The new functionalities introduced by the SAW-induced dynamic modulation and by the control of the transport as well as of the light propagation properties in low-dimensional semiconductors are expected to form the basis for future applications in novel SAW-based acoustooptical and electrooptical devices.

本项目旨在研究高频表面声波与低维半导体结构之间的相互作用。这些高频saw的波长（与载流子扩散长度相当）和周期（与光生载流子的典型寿命相当）有望在量子阱、量子线和量子点中导致新的有趣的物理现象。这些研究将使用高横向分辨率（小于1 μ m）和时间分辨率低于SAW振荡周期（0.5至10 ns）的光谱技术进行。通过这种方式，我们将能够局部探索saw与能带结构之间相互作用的动态方面。在低维半导体中，saw诱导的动态调制和光传输特性的控制所带来的新功能有望为未来新型基于saw的声光和电光器件的应用奠定基础。