From Optical Near-Field Control to Nanoscale Quantum Control

报告题目：From Optical Near-Field Control to Nanoscale Quantum Control

报告人：Prof. Walter Pfeiffer

主持人：Prof. Konstantin Dorfman

时间：2019-06-13 10:00

地点：理科大楼A814

报告人简介：

Walter Pfeiffer studied physics at Konstanz University, Germany and did his PhD in 1993 in the field of defects in semiconductors. He moved then to the field of ultrafast laser spectroscopy at surfaces and did his habilitation in this field in 2000. Since 2006 he is a professor for Ultrafast Laser Spectroscopy at Bielefeld the University. His main research interests are ultrafast spectroscopy, photoninduced electronic transport, electronic relaxation, nano-junctions, scanning tunnelling microscopy, photoelectron spectroscopy, multiphoton processes in metals and nanostructures, adaptive optics, nano-optics, coherent control of quantum mechanical systems, molecular electronics, photocurrent spectroscopy, attosecond time-resolved photoelectron spectroscopy.

报告内容简介：

Simultaneous spatio-temporal control of optical near fields offers striking possibilities to steer and manipulate excitations in complex nanostructures. It opens a route towards space-time-resolved spectroscopy on nanometer length-scales and femtosecond time-scales with the potential of direct observation of nanoscopic energy or electron transport. Methods to achieve this control are presented and discussed. This field control is only the first step to reach nanoscale quantum control. Based on an elliptical plasmonic cavity with embedded optical antennas strong coupling between the antennas is demonstrated in simulations and experiment. In ongoing theoretical studies this plasmonic device is exploited to realize long-range quantum emitter coupling and study the emergent non-classical photon correlations and quantum emitter entanglement phenomena.