Seminar with Prof. Dr. Tom Brown

Thursday, April 11, 2019, 11:00 HPP M 12 -  Hoenggerberg


** Speaker: Prof. Dr. Tom Brown, University of Rochester, Institute of Optics

** Title: The coherence of very short wavelength phonons: Optical analogs of phonon coherence and implications for the optical properties of silicon

** Abstract: The near infrared optical properties of crystalline silicon are determined, in large part, by very short wavelength (~1 nm) phonons. These phonons are revealed in free exciton recombination and typically undergo strong inelastic scattering so very little spatial coherence of the phonons is possible. In this talk I will begin by giving a broad picture of silicon and its limitations in integrated photonics and end with a discussion of how understanding and controlling the short wavelength phonons could provide an opportunity for the engineering of nanoscale electron-phonon interactions in silicon.

** Short bio: Thomas G. Brown  is on the faculty of the Institute of Optics, University of Rochester (NY-USA). His past research has included topics in silicon photonics (switching and light emission), guided mode resonances, complex polarization states, optical metrology and microscopy, and semiconductor laser modeling.  He is a Fellow of OSA and SPIE and currently serves as chair of the multidimensional microscopy conference at Photonics West and is the academic co-lead for test, assembly and packaging in the AIM Photonics Consortium.