%0 Journal Article
%T Polarization Properties of Quantum-Dot-Based Single Photon Sources
%A HAN Shuo
%A HAO Zhi-Biao
%A LUO Yi
%A <br>韩朔
%A 郝智彪
%A 罗毅
%J 中国物理快报
%D 2007
%I 
%X Polarization properties of single photons emitted by optical pumping from a single quantum dot (QD) are studied by using a four-level system model. The model is capable of explaining the polarization uncertainty observed in single photon emission experiments. It is found that the dependence of photon emission efficiency and polarization visibility on pump power are opposite in general cases. By employing QDs with small size and strong carrier confinement, the photon polarization visibility under high pump power can be improved. In addition, embedding a QD into a well designed microcavity is also found to be favourable, whereas the trade-off between high polarization visibility and multi-photon emission is noted.
%K 78
%K 67
%K Hc
%K 71
%K 35
%K Cc
%K 42
%K 50
%K Dv<br>量子点
%K 光子源
%K 极化设备
%K 物理学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=03664AC44D4808186AA3E7E0019CE980&yid=A732AF04DDA03BB3&vid=B91E8C6D6FE990DB&iid=DF92D298D3FF1E6E&sid=1F552201CAFF2426&eid=1BF0B9E7EC703940&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0