Giant heating of Si nanoparticles by weak laser light: Optical microspectroscopic study and application to particle modification

Journal Article · Sun May 15 00:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1904157· OSTI ID:20709670

Poborchii, Vladimir; Tada, Tetsuya; Kanayama, Toshihiko ^[1]

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1. Millenium Research for Advanced Information Technology (MIRAI), Advanced Semiconductor Research Center, National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 4, Higashi, Tsukuba 305-8562 (Japan)

We show that Si particles 20-30 nm in diameter can be heated up to {approx}1500 K in atmospheric conditions by illumination with weak ({approx}1 mW) but sharply focused ({approx}2 {mu}m) visible laser light. Crystallization, oxidation, and color change of the particles occur as the result of the light-induced heating of the particles. These effects can be used for modification of the particles and preparation of Si-based luminescent material.

• OSTI ID: 20709670
• Journal Information: Journal of Applied Physics, Vol. 97, Issue 10; Other Information: DOI: 10.1063/1.1904157; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COLOR
CRYSTALLIZATION
HEATING
LASERS
LUMINESCENCE
MODIFICATIONS
NANOSTRUCTURES
OXIDATION
PARTICLES
SEMICONDUCTOR MATERIALS
SILICON
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 1000-4000 K
VISIBLE RADIATION
VISIBLE SPECTRA