光学微腔对光子激子系统玻色凝聚温度和热容量的影响  

Impact of Optical Microcavity on Temperature and Heat Capacity of Bose Condensation in Photon-Exciton System

作　　者：龙晓霞[1] 

机构地区：[1]重庆文理学院电子电气工程学院,重庆永川402160

出　　处：《西南师范大学学报（自然科学版）》2012年第9期32-37,共6页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：重庆文理学院科学技术研究项目(Y2011DQ53)

摘　　要：以半导体GaAs光学微腔为例,探讨了光学微腔对光子激子系统玻色凝聚温度和热容量的影响.结果表明:玻色凝聚临界温度随微腔宽度增大而升高,但只在微腔宽度不大时,变化才显著;而微腔宽度太小时,系统不会出现玻色凝聚;玻色凝聚临界温度随微腔内各点的位置变化很小,它只在腔内r=0附近较高;光子和激子对微腔热容量的贡献大致相同,均随温度升高而增大,随微腔宽度的增大而减小;微腔形状对玻色凝聚临界温度和热容量的影响很小.热容量只在微腔宽度很小时随位置的变化才显著.Taking semiconductor GaAs optical micro-cavity for example, the impact of the optical micro- cavity on the temperature and heat capacity of Bose condensation in exciton-photon system are researched in this paper. It shows that critical temperature of Bose condensation increases with rising of micro-cavity＇ s width, but it is significant only when the width of micro-ca in the system when the width of micro cavity is very small. vity Th is small. There＇s not Bose condensation e variety of Bose condensation＇ s critical temperature is little with the position in micro-cavity. The critical temperature is high in the vicinity of in micro-cavity. Photon and exciton contribute on heat capacity nearly the same. They are both increasing with temperature, and decreasing with the width of micro-cavity. The impact of micro-cavity shape on the temperature and heat capacity of Bose condensation is little. The change of heat capacity with position is obvious only when the width of micro-cavity is very small.

关 键 词：光学微腔 光子激子系统 玻色凝聚临界温度 热容量 

分 类 号：O482.3[理学—固体物理]