材料科学
制作
基质(水族馆)
光电子学
平版印刷术
波长
光学
Crystal(编程语言)
有机半导体
晶体生长
化学
结晶学
病理
地质学
物理
程序设计语言
海洋学
替代医学
医学
计算机科学
作者
W. Geis,Roger F. Sinta,William A. Mowers,S. J. Deneault,Michael Marchant,K. E. Krohn,S. J. Spector,D.R. Calawa,T. M. Lyszczarz
摘要
Single-crystal optical waveguides of 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST), an organic material with a large electro-optic coefficient, have been obtained. DAST decomposes at its melting temperature, making its growth from the melt difficult. However, graphoepitaxy allows for >1 mm s−1 growth, 1×105 times faster than conventional techniques, and produces crystals of the correct dimensions for optical waveguides, 1–15 μm on a side and 5–10 mm long. The crystals grow with the c-axis normal to the substrate, and with in-plane orientation determined by lithographic patterning. The electro-optic coefficient dn/dE is 600±300 pm V−1 at 1.55 μm wavelength. Optical losses are <10 dB cm−1.
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