Letter

[OPTICAL REVIEW Vol. 10, No. 1 (2003) 1-3]
© 2003 The Optical Society of Japan

Analysis of Acoustic Domain Fluxes in a Piezoelectric Semiconductor n-CdS Measured by Brillouin Scattering Method

Yoshiaki TOKUNAGA, Shohei KANNO1 and Toshinori OKAYAMA1

Optoelectronic Device System Research and Development Center of Kanazawa Institute of Technology, 7-1 Ogigaoka, Nonoichi-machi, Ishikawa 921-8501, Japan

1Graduate School of Electrical Engineering and Electronics of Kanazawa Institute of Technology, 7-1 Ogigaoka, Nonoichi-machi, Ishikawa 921-8501, Japan

(Received July 26, 2002; Accepted November 22, 2002)

Acoustic fluxes constituting an acoustic domain in a piezoelectric semiconducting n-CdS were analyzed by Brillouin scattering method. Obtained results were as follows: 0.8 GHz and 2.0 GHz acoustic fluxes were faster than the sound velocity 1.75×105 cm/s. The observed profile of the 2.0 GHz flux agreed fairly well with the simulated one performed numerically by KdV equation. The faster positions of the acoustic domain were formed by lower frequency acoustic fluxes and the slower positions understood by acoustic fluxes around maximum gain frequency generated first in a small signal regime.

Key words: Brillouin scattering method, n-CdS, soliton, KdV equation, acoustic domain

 

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