Crystal growth and optical second harmonic generation of Ni-Br boracite

Y. Uesu Department of Physics, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo, 169, Japan

Y. Murase Department of Physics, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo, 169, Japan

D. Hirasawa Department of Physics, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo, 169, Japan

T. Ishigaki Matsushita Research Institute Tokyo, Inc., 3-10-1, Higashi-mita, Tamaku, Kawasaki, 214, Japan

Abstract

Ferroelectric Ni-Br boracite crystals were grown by a modified Schmid method, by using a horizontal-type vessel. Single crystals with maximum dimension of 6 × 5 × 5 mm³ were obtained. Optical second harmonic generation (SHG) of the crystal was measured as a function of temperature. It was found that Ni-Br boracite was SHG-active both below and above the ferroelectric transition temperature T_c of 120°C and that the SHG intensity decreases toward T_c in the ferroelectric phase.

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Crystal growth and optical second harmonic generation of Ni-Br boracite

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Crystal growth and optical second harmonic generation of Ni-Br boracite

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