Journal of Materials Research

Rapid Communications

Periodic Twinning in Crystal Quartz for Optical Quasi-Phase Matched Secondary Harmonic Conversion

Masaki Haradaa1a), Ken-Ichi Muramatsua1, Yutaka Iwasakia1, Sunao Kurimuraa2b) and Takunori Tairaa3

a1 Nikon Corporation, 1-6-1 Shinagawa-ku, Tokyo 140-8601 Japan

a2 National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan

a3 Laser Research Center for Molecular Science, 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan

Abstract

We show here the possibility of optical quasi-phase matched secondary harmonic generation in crystal quartz that is a non-ferroelectric crystal. By utilizing a twinning phenomenon, for the first time, we have succeeded in fabricating periodic modulation of the nonlinear coefficient by hot pressing. In this method, stress is applied vertically on a quartz surface. We also devised a special press system. The numbers of twins we have achieved are 10 for 500 μm and 17 for 250 μm periods, and the depth of the twinned area is about 50 μm. Our results suggest that the twinned regions can be controlled artificially, and over a few tens of microns of twinned depth can be realized.

(Received August 16 2003)

(Accepted December 16 2003)

Key Words:

  • Hot pressing;
  • Optical;
  • Crystal

Footnotes

a) e-mail: haradam@nikon.co.jp

b) e-mail: skurimura@nifty.com

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