%0 Journal Article
%T Study on the Optical Properties and Erasing Performance of Ge2Sb2Te5 Phase Change Thin Films<br>Ge2Sb2Te5相变薄膜光学及擦除性能研究
%A 张广军
%A 顾冬红
%A 干福熹
%J 光子学报
%D 2005
%I 
%X The erasing properties of amorphous Ge_2Sb_2Te_5 phase change films are studied by using blue-green laser. Blue-green lasers with 1000ns, 500ns, 100ns, and 60ns pulse duration are selected in the experiment. The results show that reflectivity contrast increases with the laser power increases. Within the time with 1000ns,500ns,100ns,60ns range, the amorphous films change to the crystalline phase. Erasing power higher than 4.49mW, the reflectivity contrast of films irradiation upon blue-green laser with 60ns is higher than 15%, which indicates Ge_2Sb_2Te_5 films have the high crystallization speed under the condition of short pulse duration and low erasing power. And also the optical spectra properties between amorphous and crystalline phases are analyzed. Compare to the reflectivity and the reflectivity contrast of amorphous and crystalline phases films at different wavelength with 780nm,650nm,514nm and 405nm, and present the future improving way to Ge_2Sb_2Te_5 films applied in the blue –ray disc.
%K Phase change films
%K Blue-green laser
%K Ge_2Sb_2Te_5
%K Erasing
%K Reflectivity contrast
%K Disc<br>相变薄膜
%K 蓝绿激光
%K Ge2Sb2Te5
%K 擦除
%K 反射率对比度
%K 光盘
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=B5128D95DF11D6E3&yid=2DD7160C83D0ACED&vid=339D79302DF62549&iid=E158A972A605785F&sid=52B9DFFFCC2EB041&eid=93ADA2AA3F969E58&journal_id=1004-4213&journal_name=光子学报&referenced_num=2&reference_num=17