报告题目

Ultrafast and nonlinear nanoscopy: Watching and controlling quantum dynamics in time and space

报 告 人

Markus B. Raschke

Department of Physics, Department of Chemistry, and JILA, University of Colorado, Boulder, USA

报告地点

北京大学物理学院中楼215

报告时间

2019年5月27日（周一）上午10:00-12:00

联 系 人

古英(62752882)

报告摘要

Combining plasmonic and optical antenna concepts with ultrafast and shaped laser pulses allows for the precise control of an optical excitation on femtosecond time scales, nanometer length scales, and into the strong coupling regime. I will discuss novel phenomena regarding the induced near-field light-matter interaction in terms of impedance matching to a quantum system for nano-spectroscopy and -imaging. This includes adiabatic nano-focusing on a tip for coherent spatio-temporal imaging with optical control with 10 nm spatial and 10 fs temporal resolution addressing competition and manipulation of optical coherences. I will extent into the behavior of ultra-small mode volume cavities and field localization giving rise to a new regime of nonlinear nano-optics with gradient-field induced phase matching for exceptionally efficient frequency conversion. Lastly, I will present new insight into the enhanced nonlinear optical interaction on the nanoscale of highly efficient localized four-wave mixing in graphene.

11:00 – 11:30 Markus Raschke is also associate editor of Science Advances and will introduce the journal after his talk, and be available to discuss and share advise for publishing with the journal.

报告人简介：Markus Raschke is professor at the Department of Physics, Department of Chemistry, and JILA at the University of Colorado at Boulder. His research is on the development and application of new nano-scale nonlinear and ultrafast spectroscopy techniques to control the light-matter interaction on the nanoscale. These techniques allow for imaging structure and dynamics of molecular and quantum materials with nanometer spatial resolution. He is fellow of the Optical Society of America, the American Physical Society, and the American Association for the Advancement of Science.