Polarized quantum dot emission from photonic crystal nanocavities studied under mode-resonant enhanced excitation

R. Oulton, B. D. Jones, S. Lam, A. R. A. Chalcraft, D. Szymanski, D. O'Brien, T. F. Krauss, D. Sanvitto, A. M. Fox, D. M. Whittaker, M. Hopkinson, M. S. Skolnick

Research output: Contribution to journalArticle (Academic Journal)peer-review

39 Citations (Scopus)


We study the linear polarization of the emission from single quantum dots embedded in an "L3" defect nanocavity in a two-dimensional photonic crystal. By using narrow linewidth optical excitation in resonance with higher-order modes, we are able to achieve strong quantum dot emission intensity whilst reducing the background from quantum dots in the surrounding lattice. We find that all the dots observed emit very strongly linearly polarized light of the same orientation as the closest mode, despite the fact that these quantum dots may be spectrally detuned by several times the mode linewidth. We discuss the coupling mechanisms which may explain this behavior. (C) 2007 Optical Society of America.

Original languageEnglish
Pages (from-to)17221-17230
Number of pages10
JournalOptics Express
Issue number25
Publication statusPublished - 10 Dec 2007

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