首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Coherent control of a V-type three-level system in a single quantum dot
Authors:Wang Q Q  Muller A  Cheng M T  Zhou H J  Bianucci P  Shih C K
Institution:Department of Physics, Wuhan University, Wuhan 430072, People's Republic of China. qqwang@physics.utexas.edu
Abstract:In a semiconductor quantum dot, the IIx and IIy transitions to the polarization eigenstates, |x> and |y>, naturally form a three-level V-type system. Using low-temperature polarized photoluminescence spectroscopy, we have investigated the exciton dynamics arising under strong laser excitation. We also explicitly solved the density matrix equations for comparison with the experimental data. The polarization of the exciting field controls the coupling between the otherwise orthogonal states. In particular, when the system is initialized into \Y>, a polarization-tailored pulse can swap the population into |x>, and vice versa, effectively operating on the exciton spin.
Keywords:
本文献已被 PubMed 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号