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

doi:10.1088/1674-1056/20/4/047104

中国物理B ›› 2011, Vol. 20 ›› Issue (4): 47104-047104.doi: 10.1088/1674-1056/20/4/047104

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

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

刘瑞斌, 邹炳锁

Nanophotonics Laboratory, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China

收稿日期:2010-09-20 修回日期:2010-11-12 出版日期:2011-04-15 发布日期:2011-04-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 90606001，20873039, and 51002011) and the Excellent Young Scholars Research Fund of Beijing Institute of Technology.

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

Liu Rui-Bin(刘瑞斌) and Zou Bing-Suo(邹炳锁)^†

Nanophotonics Laboratory, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China

Received:2010-09-20 Revised:2010-11-12 Online:2011-04-15 Published:2011-04-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 90606001，20873039, and 51002011) and the Excellent Young Scholars Research Fund of Beijing Institute of Technology.

摘要/Abstract

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.

Abstract: 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.

Key words: Bose–Einstein condensation, exciton, biphonon, ZnO nanowire

中图分类号: (Collective effects (Bose effects, phase space filling, and excitonic phase transitions))

71.35.Lk

71.55.Gs (II-VI semiconductors) 72.80.Ey (III-V and II-VI semiconductors)

刘瑞斌, 邹炳锁. Lasing behaviour from the condensation of polaronic excitons in a ZnO nanowire[J]. 中国物理B, 2011, 20(4): 47104-047104.

Liu Rui-Bin(刘瑞斌) and Zou Bing-Suo(邹炳锁) . Lasing behaviour from the condensation of polaronic excitons in a ZnO nanowire[J]. Chin. Phys. B, 2011, 20(4): 47104-047104.

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

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

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