Optical Control of Transport and Dynamics in Junctions

路口传输和动力学的光学控制

• 批准号: 1012207
• 负责人: Tamar Seideman
• 金额: $ 43万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1012207&HistoricalAwards=false
• 关键词: Optical; Control; Transport; Dynamics; Junctions

Tamar Seideman of Northwestern University is supported by an award from the Theory Models and Computational Method program for developing a new approach to coherent control of both electric transport and vibrational dynamics in molecular junctions. The approach is based on semiconductor molecular electronics and the application of low-frequency, sub-bandgap light. This project focuses on theory and computational realizations of electronic transport in nanodevices and coherent control. The present formalism consistently accounts for the electron scattering dynamics, the possibility of nuclear dynamics, the nonadiabatic coupling of the electronic and vibrational motions, the interaction with light, the plasmonic response of the electrodes, and the dissipation due to electron hole pair excitation and to electrode phonons. Additionally, a novel numerical method is developed for computing the transport properties of molecular junctions. This method is applicable to semiconductor-based junctions and is efficient enough to be implemented in a control scheme. Among the applications to be addressed with theoretical and computational emphases are transport, dynamics, plasmonic response in Au-C60-Au junctions, STM driven surface nanochemistry, and nanoplasmonics. Most of these developments are complementary to forefront research in three collaborative experimental groups. This type of collaboration enhances the education and research experience of students in both theoretical and experimental groups. Broader impacts result from the continued engagement of this group in a variety of outreach and teaching activities, including work within the National Center for Learning and Teaching in the nanosciences (NCLT), the Network for Computational Nanotechnology (NCN), the Summer Research Opportunities Program for minority undergraduate students (SROP), the Research Experience for Undergraduates and for Teachers Programs (REU and RET, respectively); work within a program that uses science to create collaboration and friendship between Israeli and Palestinian students; advising and mentoring in two international student exchange programs; guidance of several undergraduate students; and delivery of lectures about nanotechnology to the elderly and to children. Furthermore, the numerical code is made available to the scientific community and is broadly disseminated.

西北大学的Tamar Seideman获得了理论模型和计算方法项目的支持，因为他开发了一种新的方法来相干控制分子结中的电子传输和振动动力学。这种方法是基于半导体分子电子学和低频、亚带隙光的应用。本项目主要研究电子在纳米器件中的输运和相干控制的理论和计算实现。目前的形式一致地考虑了电子散射动力学，原子核动力学的可能性，电子和振动运动的非绝热耦合，与光的相互作用，电极的等离子体响应，以及电子空穴对激发和电极声子的耗散。此外，还发展了一种新的计算分子结输运性质的数值方法。这种方法适用于基于半导体的结，并且足够有效，可以在控制方案中实现。在这些应用中，理论和计算的重点是输运、动力学、Au-C60-Au结中的等离子体响应、扫描隧道显微镜驱动的表面纳米化学和纳米等离子体。这些发展中的大多数是对三个合作实验小组的前沿研究的补充。这种类型的合作提高了学生在理论和实验小组中的教育和研究经验。这一群体继续参与各种外联和教学活动产生了更广泛的影响，其中包括在国家纳米科学学习与教学中心(NCLT)、计算纳米技术网络(NCN)、少数族裔本科生暑期研究机会计划(SROP)、本科生和教师研究经验计划(REU和RET)内的工作；在一个利用科学在以色列和巴勒斯坦学生之间建立合作和友谊的计划内的工作；在两个国际学生交流计划中提供咨询和辅导；指导几名本科生；为老年人和儿童举办关于纳米技术的讲座。此外，向科学界提供数字代码，并广泛传播。