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

Research output: Contribution to journalArticle

3 Citations (Scopus)

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
Externally publishedYes

Fingerprint

self assembly
nanoparticles
irradiation
matrices
lasers
photons
solid phases
optical absorption
energy levels
desorption
decomposition
electronics
atoms
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Effects of laser irradiation on the self-assembly of MnAs nanoparticles in a GaAs matrix. / Nam Hai, Pham; Nomura, Wataru; Yatsui, Takashi; Ohtsu, Motoichi; Tanaka, Masaaki.

In: Applied Physics Letters, Vol. 101, No. 19, 193102, 05.11.2012.

Research output: Contribution to journalArticle

Nam Hai, Pham ; Nomura, Wataru ; Yatsui, Takashi ; Ohtsu, Motoichi ; Tanaka, Masaaki. / Effects of laser irradiation on the self-assembly of MnAs nanoparticles in a GaAs matrix. In: Applied Physics Letters. 2012 ; Vol. 101, No. 19.
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