Lasing behaviour from the condensation of polaronic excitons in a ZnO nanowire  

作　　者：刘瑞斌 邹炳锁 

机构地区：[1]Nanophotonics Laboratory,School of Materials Science and Engineering,Beijing Institute of Technology

出　　处：《Chinese Physics B》2011年第4期421-429,共9页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 90606001,20873039,and 51002011);the Excellent Young Scholars Research Fund of Beijing Institute of Technology

摘　　要：Atoms under optical and magnetic trapping in a limited space at a very low temperature can lead to Bose-Einstein condensation （BEC）, even in a one-dimensional （1D） optical lattice. However, can the confinment of dense excitons in a 1D semiconductor microstructure easily reach the excitonic BEC？ A lightly Mn（II）-doped ZnO nanowire under a femtosecond laser pulse pump at room temperature produces single-mode lasing from coherent bipolaronic excitons, which is much like a macroscopic quantum state due to the condensation of the bipoaronic excitons if not real BEC. In this process, longitudinal biphonon binding with the exciton plays an important role. We revisit this system and propose possibility of bipolaronic exciton condensation. More studies are needed for this condensation phenomenon in 1D microcavity systems.Atoms under optical and magnetic trapping in a limited space at a very low temperature can lead to Bose-Einstein condensation （BEC）, even in a one-dimensional （1D） optical lattice. However, can the confinment of dense excitons in a 1D semiconductor microstructure easily reach the excitonic BEC？ A lightly Mn（II）-doped ZnO nanowire under a femtosecond laser pulse pump at room temperature produces single-mode lasing from coherent bipolaronic excitons, which is much like a macroscopic quantum state due to the condensation of the bipoaronic excitons if not real BEC. In this process, longitudinal biphonon binding with the exciton plays an important role. We revisit this system and propose possibility of bipolaronic exciton condensation. More studies are needed for this condensation phenomenon in 1D microcavity systems.

关 键 词：Bose-Einstein condensation EXCITON biphonon ZnO nanowire 

分 类 号：O488[理学—固体物理]