Synchronous optical modulator by liquid crystal orientation

2000（1）研究了用溅射法制备氧化钽薄膜的适宜条件，并测量了用旋涂法制备的由氧化钽和液晶层组成的基本光学模块的特性。用光谱仪测量了薄膜的透射率、折射率和吸收率随波长的变化。(2)对实际器件图形的刻蚀进行了掩模设计。采用热氧化法制备了金属钽或钛的氧化膜，并对这些膜的性能进行了测试。2001（1）研制了一套由微型可控工作台和氩激光器组成的激光拉丝系统。研究发现，掺杂染料的聚碳酸酯薄膜在强激光照射下，其透明性发生了变化。(2)用激光束辐照金属钽膜，获得其氧化表面，但观察到的变化不大。随后需要额外加热到400-500 ℃以获得氧化物表面。2002研究了由氧化钽薄膜和液晶盒组成的光学器件的性能。测量了器件对直流和脉冲驱动信号的灵敏度和响应，并讨论了克服这些问题的进一步研究。

2000(1) Appropriate conditions for the preparation of tantalum oxide films by sputtering have been investigated, and the characteristics of basic optical module composed of tantalum oxide and liquid crystal layers prepared by spin coating have been measured. The variations of optical transmission, refractive index and absorption with wavelength have been also measured with an optical spectrometer.(2) The design of masks for the etching of patterns of actual devices has been made. The oxidation of metal tantalum or titanium films was made by thermal oxidation and the properties of these films have been examined.2001(1) A laser drawing system composed of micro controllable stage and an argon laser was fabricated. It has been found that polycarbonate films doped with dyes changes the transparency of the films under the irradiation of the strong laser beam.(2) A metal tantalum film was irradiated with a laser beam to obtain the oxide surface on it. But little change was observed. An additional subsequent heating to 400-500 ℃ was necessary to obtain the oxide surface.2002The performances of optical devices compose of tantalum oxide films and a liquid crystal cell has been investigated. The sensitivity and response of the device against dc and pulse drive signals have been measured, and the further investigation to overcome the problems was discussed.