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Proceedings Paper

Imaging carrier and phonon transport in Si using ultrashort optical pulses
Author(s): D. H. Hurley; O. B. Wright; O. Matsuda; Brian E. McCandless; Subhash Shinde
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Paper Abstract

A series of experiments have been conducted that microscopically image thermal diffusion and surface acoustic phonon propagation within a single crystallite of a polycrystalline Si sample. The experimental approach employs ultrashort optical pulses to generate an electron-hole plasma and a second probe pulse is used to image the evolution of the plasma. By decomposing the signal into a component that varies with delay time and a steady state component that varies with pump modulation frequency, the respective influence of carrier recombination and thermal diffusion are identified. Additionally, the coherent surface acoustic phonon component to the signal is imaged using a Sagnac interferometer to monitor optical phase.

Paper Details

Date Published: 6 February 2009
PDF: 7 pages
Proc. SPIE 7214, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIII, 721406 (6 February 2009); doi: 10.1117/12.808212
Show Author Affiliations
D. H. Hurley, Idaho National Lab. (United States)
O. B. Wright, Hokkaido Univ. (Japan)
O. Matsuda, Hokkaido Univ. (Japan)
Brian E. McCandless, Univ. of Delaware (United States)
Subhash Shinde, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 7214:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIII
Kong-Thon Tsen; Jin-Joo Song; Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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