Near-field optical mapping of exciton wave functions in a gaas quantum dot

K. Matsuda, T. Saiki, S. Nomura, M. Mihara, Y. Aoyagi, S. Nair, T. Takagahara

    Research output: Contribution to journalArticle

    162 Citations (Scopus)


    Near-field photoluminescence imaging spectroscopy of naturally occurring GaAs quantum dots (QDs) is presented. We successfully mapped out center-of -mass wave functions of an exciton confined in a GaAs QD in real space due to the enhancement of spatial resolution up to 30 nm. As a consequence, we discovered that the spatial profile of the exciton emission, which reflects the shape of a monolayer-high island, differs from that of biexciton emission, due to different distributions of the polarization field for the exciton and biexciton recombinations. This novel technique can be extensively applied to wave function engineering in the design and the fabrication of quantum devices.

    Original languageEnglish
    JournalPhysical review letters
    Issue number17
    Publication statusPublished - 2003 Jan 1

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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