“光科学与工程”前沿系列学术报告(之二十八)

题目:1. Frozen light and degenerate band edges: linear,nonlinear and lossy 
      2. (Almost) painless publishing. on Optics Express
时间:2013年6月12日(星期三)14:30-16:30
地点:激光工程研究院报告厅(科学楼B206)
主办单位:激光工程研究院、研究生院
报告人: Prof . Martijn de Sterke (OE主编)
(School of Physics, CUDOS & IPOS University of Sydney, Australia)

 
Martijn de Sterke received the M.Eng degree in Applied Physics from the University of Delft in the Netherlands, and his PhD in Optics from the University of Rochester in the USA. After postdoctoral work at the University of Toronto in Canada, he joined the School of Physics at the University of Sydney, where he is now a Professor in Physics, He works in the area of optics and photonics, most recently in photonic crystals, photonic crystal fibers, solar energy, and nonlinear optics. He was the 1999 winner of the Pawsey Medal of the Australian of Sciences and has been a Fellow of the Optical Society of America since 2003. He was the Editor in Chief of Optics Express from 2007-2012.
 
Frozen light and degenerate band edges: linear, nonlinear and lossy
 
The dispersion relation of a photonic system often includes band edges, frequencies where the bands seem to start or finish, for example at the edges of the bandgap. The generic behaviour of the dispersion relation is quadratic here, i.e. frequency scales quadratically with wavenumber, but by careful design it can be made quartic. This leads to the presence of weakly evanescent modes, which strongly affect the wave propagation propagation around these frequencies. I will give three examples of this: efficient coupling into slow modes (“frozen light”); the lowering of the all-optical switching power threshold; and the ability for perfect absorption.
 
 
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