We model the slow-light phenomenon using electromagnetically induced transparency from spin coherence in  quantum wells. The long electron-spin lifetime in  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  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.
© 2007 Optical Society of America
Original Manuscript: September 14, 2006
Revised Manuscript: November 22, 2006
Manuscript Accepted: November 28, 2006
Published: March 15, 2007
Shu-Wei Chang, Shun Lien Chuang, Connie J. Chang-Hasnain, and Hailin Wang, "Slow light using spin coherence and V-type electromagnetically induced transparency in  strained quantum wells," J. Opt. Soc. Am. B 24, 849-859 (2007)