Liang-Yan Xu（许彦良博士）普林斯顿大学博士后
报告时间：2015年12月 29日（下周二）下午14:30-16:30
报告地点: 卢嘉锡楼202报告厅
Abstract: Laser is a promising control tool for operating ultrafast electronic devices due to a wide variety of options such as field strength, frequency, and polarization. In this talk, first, I will introduce several key concepts in electron transport in a time-periodic (ac) field such as photon-assisted tunneling and coherent destruction of tunneling. Derived from a scattering model using single-particle Green’s functions together with non-Hermitian Floquet theory, the method can be applied to investigate coherent quantum transport through a single-molecule device based on phenyl-acetylene macrocycle and cross-conjugated systems in a linear polarized laser field. In a two terminal system, we proposed a new type of optoelectronic switch which utilizes photon-assisted tunneling and destructive quantum interference. The large on-off switch ratios and weak-field operation suggest the possibility of constructing a single-molecule optoelectronic switch. Moreover, several new concepts such as "current-laser frequency characteristics", "current-field amplitude characteristics", and "current-polarization angle characteristics" will be introduced in this talk. The investigation opens up a new direction for exploring single-molecule optoelectronics.
参考文献
[1]. Single-Molecule Phenyl-Acetylene-Macrocycle-Based Optoelectronic Switch Functioning as a Quantum-Interference-Effect TransistorLY Hsu, H RabitzPhysical review letters 2012, 109 (18), 186801
[2]. Single-Molecule Electric Revolving DoorLY Hsu, EY Li, H RabitzNano letters 2013, 13 (11), 5020-5025
[3]. Light-driven electron transport through a molecular junction based on cross-conjugated systemsLY Hsu, D Xie, H RabitzThe Journal of chemical physics 2014, 141 (12), 12470
[4]. Molecular Series-Tunneling JunctionsKC Liao, LY Hsu, CM Bowers, H Rabitz, GM WhitesidesJournal of the American Chemical Society 2015, 137 (18), 5948-5954
[5]. Physical review letters 2012, 109 (18), 186801
[6]. Nano letters 2013, 13 (11), 5020-5025
[7]. The Journal of chemical physics 2014, 141 (12), 12470
[8]. Journal of the American Chemical Society 2015, 137 (18), 5948-5954
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