CAREER: Coulomb-induced Dynamics in the Nonlinear Optical Spectra of Low-dimensional Systems: Beyond Mean Field Theory

建议编号：ECS-9703453首席研究员：Ilias Perakis标题：Career：低维系统非线性光谱中的库仑诱导动力学：超越平均场理论将使用一种理论/计算方法：耦合团簇方法来研究半导体和金属中多体库仑相互作用影响亚皮秒非线性光学动力学的基本原理。将形式场理论技术扩展到超快区域，从来没有完全或系统地完成过。多体电荷相互作用对于在超快时间尺度上描述电荷的产生和复合具有重要意义。实验还表明，光激发载流子之间的库仑相互作用可以提供使光开关设备工作在太赫兹区域的机制。还将进行强有力的试验性合作。开关是目前光/光电通信、计算等应用中最严重的限制因素之一。该教育计划涉及在范德比尔特大学建立一个新的多学科计算科学专业，并得到系主任和大学的大力支持。多学科计算科学的重要性与日俱增，目前在大多数大学课程中的比例都很低。一门以问题形成法为基础的新生新课程也正在开发中，还有一门普通科学课程，其主题是互联网的基本电子和计算方面。

Proposal Number: ECS-9703453 Principal Investigator: Ilias Perakis Title: CAREER: Coulomb-induced Dynamics in the Nonlinear Optical Spectra of Low-Dimensional Systems: Beyond Mean Field Theory The fundamental principles of how many-body Coulomb interactions influence sub-picosecond nonlinear optical dynamics in semiconductors and metals will be investigated using a theoretical/computational approach: the coupled cluster approach. The extension of formal field theoretic techniques to the ultrafast regime has never been done in a complete or systematic manner. Many-body charge interactions are of importance in describing charge generation and recombination on ultrafast time scales. Experiments also indicate that Coulomb interactions among optically excited carriers could provide the mechanism that would allow optical switching devices to operate in the THz regime. Strong experimental collaborations will also be pursued. Switching is presently one of the most serious limiting factors in optical/optoelectronic communications, computing and other applications. The educational plan involves development of a new multidisciplinary computational science major at Vanderbilt, with the strong endorsement from the department chair and university. Multidisciplinary computational science is growing in importance and is currently underrepresented in most university curricula. A new class for freshman based on problem formulating approaches is also being developed, as is a general science course, which has basic electronic and computational aspects of the Internet as its theme.