Slow light using spin coherence and V-type electromagnetically induced transparency in [110] strained quantum wells
Shu‐Wei Chang, Shun Lien Chuang, Connie J. Chang-Hasnain +1 more
We model the slow-light phenomenon using electromagnetically induced transparency from spin coherence in [110] quantum wells. The long electron-spin lifetime in [110] quantum wells and the strain-induced shift of the light-hole-like excitonic transition energy below those of the heavy-hole-like continuum states can enhance the performance of slow light. The optical anisotropy due to band mixing and strain in [110] quantum wells is properly taken into consideration. By using light-hole-like excitons, the delay of a probe light with TM polarization in an optical waveguide controllable by an intense pump is made possible with the aid of long spin coherence.
Journal of the Optical Society of America B•Mar 15, 2007•15 citations