U.S.-Federal Republic of Germany Cooperative Research: Nonlinear Optical Properties of Microstructures and Femtosecond Phenomena in Semiconductors

美德合作研究：微结构的非线性光学特性和半导体中的飞秒现象

• 批准号: 8713068
• 负责人: Nasser Peyghambarian
• 金额: $ 0.76万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-03-01 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8713068&HistoricalAwards=false
• 关键词: U.S.; Federal; Republic; Germany; Cooperative

This award will enable Dr. Nasser Peyghambarian and Dr. Stephen W. Koch. University of Arizona, to collaborate with Dr. Hartmut Haug, University of Frankfurt, Federal Republic of Germany. They are carrying out experimental and theoretical studies of quantum confinement effects and short pulse phenomena in semiconductor micro-structures. Experimental work will include a study of the dynamics of highly excited semiconductors and semiconductor micro-structures using femtosecond laser excitation. They will induce gaps in semiconductor bands with light, and they will measure the evolution of the spectral hole and carrier thermalization process. They will also investigate nonlinear optical properties of semiconductor quantum-dots using semiconductor micro-crystallite doped glasses and etched micro-structures. The researchers' theoretical studies will examine the linear and nonlinear optical properties of semiconductor micro-structures and analyze quantum confinement effects. They will also study coherent processes and high-field effects in semiconductors with non-equilibrium Green functions and quantum-mechanical rate theories. They will investigate ac-Stark splitting of semiconductor bands caused by a strong external field and they will compute the dynamics of the nonequilibrium carrier distribution. A semiconductor under strong optical excitation is an ideal system to study nonlinear and non equilibrium processes of high current interest in solid state physics. The purpose of the research is to study the basic phenomena associated with nonlinear interactions between light waves and a variety of materials, most notably semiconductors with reduced space dimensions. Dr. Peyghambarian has done many of the experimental studies relevant to this research using a state of the art femtosecond laser system in his laboratory. Dr. Koch and Dr. Haug provide strong complementary theoretical expertise for the collaboration. The research is important for understanding fundamental physical phenomena which have potential applications in optical signal processing.

该奖项将使Nasser Peyghambarian博士和Stephen W. Koch博士。 亚利桑那大学与德国联邦共和国法兰克大学的Hartmut Haug博士合作。 他们正在对半导体微结构中的量子约束效应和短脉冲现象进行实验和理论研究。 实验性工作将包括对使用飞秒激光激发高度激发的半导体和半导体微结构的动力学研究。 它们将在光线上诱导半导体带中的间隙，并将测量光谱孔和载体热化过程的演变。 他们还将使用半导体微晶掺杂玻璃和蚀刻微结构来研究半导体量子点的非线性光学性质。 研究人员的理论研究将检查半导体微结构的线性和非线性光学特性，并分析量子约束效应。 他们还将研究具有非平衡绿色函数和量子力学速率理论的半导体中的相干过程和高场效应。 他们将研究由强大外部场引起的半导体带的AC-Stark分裂，并将计算非平衡载体分布的动力学。 强烈的光激发下的半导体是研究固态物理学高电流兴趣的非线性和非平衡过程的理想系统。 该研究的目的是研究与光波与多种材料之间非线性相互作用相关的基本现象，最著名的是半导体，其空间尺寸降低。 Peyghambarian博士在其实验室中使用最先进的激光系统进行了许多与这项研究相关的实验研究。 Koch博士和Haug博士为合作提供了强大的互补理论专业知识。 该研究对于理解具有潜在应用在光学信号处理中的基本物理现象很重要。