Optical emission from individual InGaAs quantum dots in single-defect photonic crystal nanocavity

W. H. Chang, W. Y. Chen, H. S. Chang, T. M. Hsu, T. P. Hsieh, J. I. Chyi

研究成果: 雜誌貢獻期刊論文同行評審

3 引文 斯高帕斯(Scopus)

摘要

Collective and individual emissions from In0.5 Ga0.5 As quantum dots (QDs) in single-defect photonic crystal nanocavities are investigated. When the cavity mode is collectively excited by the QD ensemble, a pair of dipolelike modes with definite linear polarizations is shown. Under low excitations, single-exciton emission lines are resolved. The power dependence of individual QD emissions reveals a nearly tenfold light enhancement for on-resonance QDs. The polarization state of each individual QD is also investigated. It is found that an individual dot could excite either a pure dipole mode or a mixture of both dipole modes. This behavior can be attributed to the random distribution of QDs in the nanocavity.

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文章編號034306
期刊Journal of Applied Physics
98
發行號3
DOIs
出版狀態已出版 - 1 8月 2005

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