%0 Journal Article
%T Studies on the temperature and energy dependence of g factor in GaAs by femtosecond laser absorption quantum beats<br>GaAs中电子g因子的温度和能量依赖性的飞秒激光吸收量子拍研究
%A Xu Hai-Hong
%A Jiao Zhong-Xing
%A Liu Xiao-Dong
%A Lei Liang
%A Wen Jin-Hui
%A Wang Hui
%A Lin Wei-Zhu
%A Lai Tian-Shu
%A <br>徐海红
%A 焦中兴
%A 刘晓东
%A 雷亮
%A 文锦辉
%A 王惠
%A 林位株
%A 赖天树
%J 物理学报
%D 2006
%I 
%X Time-resolved elliptically polarized pump-probe spectroscopy developed by us is used to study spin relaxation dynamics of electrons in an intrinsic GaAs under an external magnetic field. Absorption quantum beats are observed and attributed to Larmor precession of electron spin around the magnetic field. The frequency of this quantum beat is used as a new method to measure electronic g factor with high accuracy. In this paper, this new method is utilized to investigate the temperature and energy dependence of electronic g factor in the intrinsic GaAs. It is found that electronic g factor increases with the temperature and energy of electrons, which is guitc different from the dependence predicted by k·p theory. An empirical formula is given to describe the temperature and energy dependence of g factor by fitting experimental data.
%K GaAs<br>椭圆偏振光抽运-探测光谱
%K 自旋量子拍
%K g因子
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=E9421F3B814D7D2A&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=94C357A881DFC066&sid=A062F22D71B60E53&eid=0C0EBE1CE8E15570&journal_id=1000-3290&journal_name=物理学报&referenced_num=1&reference_num=16