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

Journal Article · Mon Nov 05 00:00:00 EST 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4765355· OSTI ID:22089508

Hai, Pham Nam; Nomura, Wataru ^[1]; Yatsui, Takashi; Ohtsu, Motoichi; Tanaka, Masaaki ^[1]

---

1. Department of Electrical Engineering and Information Systems, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan)

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{sub 1} in the size distribution of small MnAs nanoparticles depends on the incident photon energy E following D{sub 1} {approx} E{sup -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.

• OSTI ID: 22089508
• Journal Information: Applied Physics Letters, Vol. 101, Issue 19; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
ATOMS
DECOMPOSITION
DESORPTION
DISTRIBUTION
FERROMAGNETIC MATERIALS
GALLIUM ARSENIDES
LASER RADIATION
MANGANESE ARSENIDES
MATRIX MATERIALS
NANOSTRUCTURES
PHOTONS
PHYSICAL RADIATION EFFECTS
SURFACES