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Proceedings Paper

Periodic domain inversion in Z-cut LiTaO3 by electron beam scanning assisted by an internal field within the crystal
Author(s): Venkatraman Gopalan; Alan C. G. Nutt; Mool C. Gupta
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Paper Abstract

The coercive field for domain reversal in a 0.5 mm Z-cut LiTaO3 was measured to be 21 KV/mm. However, if the polarization of the crystal is reversed using an electric field of 21 KV/mm, the coercive field for a second reversal is found to be 11 KV/mm. This asymmetry is due to the presence of an in-built internal field of 5 KV/mm in the virgin crystal. If the electron beam writing is done on the new C-face of the polarization reversed region of the crystal, (1) no cracking was observed, (2) the writing required less charge for domain inversion because of the reduced coercive field, thereby facilitating shorter scan times. We have obtained uniform 3.6 micrometers period domain inversion grating using this technique.

Paper Details

Date Published: 10 May 1996
PDF: 7 pages
Proc. SPIE 2700, Nonlinear Frequency Generation and Conversion, (10 May 1996); doi: 10.1117/12.239671
Show Author Affiliations
Venkatraman Gopalan, Eastman Kodak Co. (United States)
Alan C. G. Nutt, Eastman Kodak Co. (United States)
Mool C. Gupta, Eastman Kodak Co. (United States)

Published in SPIE Proceedings Vol. 2700:
Nonlinear Frequency Generation and Conversion
Mool C. Gupta; William J. Kozlovsky; David C. MacPherson, Editor(s)

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