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

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

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.

Original languageEnglish
Article number034306
Pages (from-to)1-4
Number of pages4
JournalJournal of Applied Physics
Volume98
Issue number3
DOIs
StatePublished - 5 Aug 2005

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