[原分所演講] IAMS Lecture on March 25, 10:00am, C.T. Chang Memorial Hall, Dr. Liang-Yan Hsu
消息來源：化學系辦公室
截止日期：2016-03-18
IAMS Lecture Announcement
中研院原分所演講公告
Title: Light-Driven Electron Transport at the Nanoscale: Theory and Applications
Speaker: Dr. Liang-Yan Hsu (Princeton University, USA)
Time: 10:00 AM, March 25 (Friday)
Place: Dr. Poe Lecture Hall, IAMS (本所浦大邦講堂 臺大校園內)
Contact: Dr. Jung-Chi Liao 廖仲麒博士
Abstract:
Electron transport through nanoscale systems such as molecular junctions in the presence of coherent light is a fundamental subject in chemical physics and nanotechnology. In this talk, first, I would like to give a brief overview of quantum transport and introduce several key concepts in electron transport in a time-periodic (ac) field including photon-assisted tunneling and coherent destruction of tunneling. To explore light-driven electron transport through molecules and quantum dots, Meir-Wingree-type formula is derived in the framework of single-particle Green’s functions together with non-Hermitian Floquet theory. In a two terminal system, we investigate electron transport through aromatic hydrocarbon in a linearly polarized laser field and propose a new type of optoelectronic switch based on photon-assisted tunneling and destructive quantum interference. Moreover, several new concepts including *current-laser frequency characteristics*, *current-field amplitude characteristics*, and *current-polarization angle characteristics* are introduced in this talk. In a three-terminal system, a single-molecule optoelectronic router can be built by manipulating the direction of a linearly polarized laser field. In a cross-conjugated system, molecules with odd and even numbers of alkenyl groups exhibit completely different current-polarization characteristics. If time permits, I will talk about the maximum power of photocurrent generated by photon-assisted tunneling (not exciton). The investigation opens up a new direction for exploring nanoscale optoelectronics.
中研院原分所演講公告
Title: Light-Driven Electron Transport at the Nanoscale: Theory and Applications
Speaker: Dr. Liang-Yan Hsu (Princeton University, USA)
Time: 10:00 AM, March 25 (Friday)
Place: Dr. Poe Lecture Hall, IAMS (本所浦大邦講堂 臺大校園內)
Contact: Dr. Jung-Chi Liao 廖仲麒博士
Abstract:
Electron transport through nanoscale systems such as molecular junctions in the presence of coherent light is a fundamental subject in chemical physics and nanotechnology. In this talk, first, I would like to give a brief overview of quantum transport and introduce several key concepts in electron transport in a time-periodic (ac) field including photon-assisted tunneling and coherent destruction of tunneling. To explore light-driven electron transport through molecules and quantum dots, Meir-Wingree-type formula is derived in the framework of single-particle Green’s functions together with non-Hermitian Floquet theory. In a two terminal system, we investigate electron transport through aromatic hydrocarbon in a linearly polarized laser field and propose a new type of optoelectronic switch based on photon-assisted tunneling and destructive quantum interference. Moreover, several new concepts including *current-laser frequency characteristics*, *current-field amplitude characteristics*, and *current-polarization angle characteristics* are introduced in this talk. In a three-terminal system, a single-molecule optoelectronic router can be built by manipulating the direction of a linearly polarized laser field. In a cross-conjugated system, molecules with odd and even numbers of alkenyl groups exhibit completely different current-polarization characteristics. If time permits, I will talk about the maximum power of photocurrent generated by photon-assisted tunneling (not exciton). The investigation opens up a new direction for exploring nanoscale optoelectronics.