Effects of laser irradiation on the self-assembly of MnAs nanoparticles in a GaAs matrix

Pham Nam Hai, Wataru Nomura, Takashi Yatsui, Motoichi Ohtsu, Masaaki Tanaka

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    Abstract

    We investigate the effects of laser irradiation on the self-assembly of MnAs nanoparticles during solid-phase decomposition in a GaAs matrix. It is found that laser irradiation suppresses the growth of MnAs nanoparticles from small to large size, and that the median diameter D 1 in the size distribution of small MnAs nanoparticles depends on the incident photon energy E following D 1 ∼ E -1/5. We explain this behavior by the desorption of Mn atoms on the MnAs nanoparticle surface due to resonant optical absorption, in which incident photons excite intersubband electronic transitions between the quantized energy levels in the MnAs nanoparticles.

    Original languageEnglish
    Article number193102
    JournalApplied Physics Letters
    Volume101
    Issue number19
    DOIs
    Publication statusPublished - Nov 5 2012

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    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy (miscellaneous)

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