%0 Journal Article
%T Microwave-modulated reflectance spectroscopy in a GaAs/AlGaAs heterostructure<br>GaAs/AlGaAs异质结的微波调制反射谱
%A QIAN Xuan
%A GU Xiao-Fang
%A JI Yang
%A <br>钱轩
%A 谷晓芳
%A 姬扬
%J 红外与毫米波学报
%D 2011
%I Science Press
%X A microwave-modulated reflectance spectroscopy (MMRS) measurement system was constructed and this MMRS technique was used to identify a transition from holes in valence band to electrons in the ground subband (GS) of the two-dimensional electron system (2DES) embedded in a GaAs/AlGaAs heterostructure sample. The temperature (T) dependence of the MMRS shows a blue shift of the energy gap with increasing T, while the magnetic field (B) dependence of the MMRS shows a red shift of the energy gap with increasing B: both phenomena are attributed to the bandfilling effect of holes in valence band in the GaAs/AlGaAs heterostructure. A theoretical simulation based on Kramers-Kronig relation was also presented which was comparable with the experimental data.
%K microwave-modulated reflectance spectroscopy
%K two-dimensional electron system<br>微波调制反射谱
%K 二维电子系统
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=D3B4F771D1A06062008B4D0A2EF05996&aid=5A63F5AD7FC6A6792A257F8AEC12FD4D&yid=9377ED8094509821&vid=340AC2BF8E7AB4FD&iid=B31275AF3241DB2D&sid=8C8D895E58E44DBB&eid=F176272DD933A0BB&journal_id=1001-9014&journal_name=红外与毫米波学报&referenced_num=0&reference_num=10