%0 Journal Article
%T Transient photoresponse in Pr0.7Ca0.3MnO3 thin films at room temperature<br>室温下Pr0.7Ca0.3MnO3薄膜的瞬态光响应特性
%A Yan Zi-Jie
%A Yuan Xiao
%A Xu Ye-Bin
%A Gao Guo-Mian
%A Chen Chang-Le
%A <br>严资杰
%A 袁 孝
%A 徐业彬
%A 高国棉
%A 陈长乐
%J 物理学报
%D 2007
%I 
%X Photoresponse characteristics of Pr0.7Ca0.3MnO3 thin films were investigated under different applied voltages and excitation light energy densities at room temperature. The transient resistance change of 92.3 % and response time of - 36 ns were observed under the excitation with a 532 nm laser pulse of 7 ns duration at a light energy density of 275.16 mJ/cm^2 . Both the resistance change and response time showed nonlinear behavior as a function of the light energy density, and the resistance and the response time were reduced when the intensity increased. However, the applied voltage had almost no effect on the photoresponse at room temperature. The phenomena are explained in terms of the photoinduced nonequilibrium insulator-to-metal transition in the film, which may have potential applications in optoelectronic devices.
%K photoresponse
%K perovskite thin film
%K insulator-metal transition<br>光响应，
%K 钙钛矿薄膜，
%K 绝缘体-金属相变
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=40491B5AB148FE43&yid=A732AF04DDA03BB3&vid=014B591DF029732F&iid=F3090AE9B60B7ED1&sid=2C0EAF2F46008486&eid=707D5C891A6FC242&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=12