CAREER: Coherent Manipulation of Carriers and Nonlinear Optical Processes in Semiconductor Quantum Wells Via Intense Multi-Cycle Terahertz Pulses

该职业奖涉及的研究，旨在探索时间相关的载流子动力学和半导体量子威尔斯（QW）在太赫兹频率范围内的非线性光学效应与新技术产生和形成强烈的多周期太赫兹脉冲。利用任意太赫兹脉冲的合成，所提出的实验方案专注于精确和相干控制的量子波包动力学表示内部跃迁的限制激子和子带间跃迁在半导体量子阱。量子相干性和基本激发的非线性响应将通过操纵和监测波包的时间演化，通过太赫兹时域光谱（THz-TDS）与强烈的多周期太赫兹脉冲进行研究。太赫兹时域光谱允许精确测量波包的相位和振幅，从而可以获得系统的完整量子信息。该教育计划将使用交互式Java程序来演示基于光物质相互作用，波传播和量子波包动力学的时域分析的研究计划的基本概念和结果。这将用于帮助修订课程和编制高年级物理课程，包括将在全国推广的物理学范例项目课程。该奖项的资金由物理系的AMOP计划与材料研究系的凝聚态物理计划共同提供。

This CAREER award deals with research that aims to explore time-dependent carrier dynamics and nonlinear optical effects in semiconductor quantum wells (QWs) in the THz frequency range with novel techniques for generating and shaping intense multi-cycle THz pulses. Exploiting syntheses of arbitrary THz pulses, the proposed experimental schemes focus on precise and coherent control of quantum wavepacket dynamics representing internal transitions of confined excitons and intersubband transitions in semiconductor QWs. Quantum coherences and nonlinear responses of the fundamental excitations will be investigated by manipulating and monitoring temporal evolution of the wavepackets via THz time-domain spectroscopy (THz-TDS) with intense multi-cycle THz pulses. THz-TDS permits precise measurements of phase as well as amplitude of the wavepackets, thus complete quantum information of the system can be obtained. The educational program will use interactive Java programs to demonstrate the basic concepts and results of the research program based on time-domain analysis of light-matter interaction, wave propagation, and quantum wavepacket dynamics. This will be used to contribute to course revision and development of upper-division physics courses including courses in the Paradigms in Physics Project which will be disseminated nationally. Funding for this award is provided by the AMOP Program in the Physics Division in conjunction with the Condensed Matter Physics Program in the Division of Materials Research.