重空穴轻空穴共同作用下GaN柱形量子点的Franz-Keldysh振荡  

The Franz-Keldysh Oscillations of Cylindrical GaN Quantum Dot of Light Hole and Heavy Hole Contributed Toghther

作　　者：高海燕[1] 李聪[2] 张天杰[1] 袁超[2] 

机构地区：[1]华北水利水电学院数学与信息科学学院,河南郑州450011 [2]河南农业大学理学院,河南郑州450002

出　　处：《江西师范大学学报（自然科学版）》2012年第1期83-86,共4页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金(10947162);河南省基础与前沿技术研究计划(112300410261)资助项目

摘　　要：利用包络函数和有效质量理论计算了GaN柱形量子点的电调制反射谱,并用Airy函数表示其柱坐标下薛定谔方程的解.着重分析了重空穴轻空穴共同作用下的GaN柱形量子点电调制反射谱的Franz-Keldysh振荡,并比较了与重空穴、轻空穴单独作用下波形的不同.随着调制电压逐渐增大,重空穴轻空穴共同作用下的电调制反射谱与其单独作用时一样出现Stark频移,即量子限制Stark频移.The electroreflectrance spectrum of cylindrical GaN quantum dot have been calculated in the effective-mass approximation and envelop function. The solution of the Schrtidinger equation under cylindrical coordinate system can be expressed in the term of Airy function. Under the contribution of light hole and heavy hole, the electroreflectrance spectra exhibits Franz-Keldysh oscillation characteristic and its difference was compared with the spectra with the con- tribution of light hole （cr heavy hole） separately. It is found that Franz-Keldysh oscillations exhibit Stark shift when the electric field intensity increased with the contribution of light hole （or heavy hole） separately or of both.

关 键 词：量子点 Franz-Keldysh振荡 量子限制Stark频移 

分 类 号：O437[机械工程—光学工程]