%0 Journal Article
%T Wavefunction and Fourier coefficients of excitons in quantum wells: computation and application<br>半导体量子阱中激子波函数及其 Fourier系数的计算和应用
%A Lei Xiao-Li
%A Wang Da-Wei
%A Liang Shi-Xiong
%A Wu Zhao-Xin
%A <br>雷小丽
%A 王大威
%A 梁士雄
%A 吴朝新
%J 物理学报
%D 2012
%I 
%X Excitonic dynamic equations, which are derived from the quasi-Boson approach, are useful tools in investigating the ultrafast optical responses of semiconductor nanostructures. To apply these equations to the exciton dynamics in semiconductor quantum wells, we need exciton wavefunctions and their representations in momentum space to obtain the coefficients in the excitonic dynamic equations. By discussing in detail the exciton wavefunctions and their momentum-space representations, we present a method of obtaining the essential coefficients in the excitonic dynamic equations. We finally use these coefficients to understand the nonlinear effects in the terahertz-pulse-induced intraexcitonic transitions caused by high exciton densities. The obtained theoretical results are in good agreement with recent experimental results.
%K quantum wells
%K exciton wavefunction
%K excitonic coefficient<br>量子阱
%K 激子波函数
%K 激子系数
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=9B2BCA8CA9CB30DFE7F160DF81E5D824&yid=99E9153A83D4CB11&vid=1D0FA33DA02ABACD&iid=94C357A881DFC066&sid=57BEB6E28DC78209&eid=57BEB6E28DC78209&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=34