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采用二芳基乙烯(DA,diarylethene)材料顺-1,2-二氰基-1,2-双(2,4,5-三甲基-3-噻吩基)乙烯cis-1,2-Dicyano-1,2-bis(2,4,5-trimethyl-3-thienyl)ethene掺杂到聚甲基丙烯酸甲酯(PMMA)制成有机掺杂薄膜样品(掺杂质量百分比为10%),基于薄膜光致吸收特性的变化构建了有机掺杂薄膜双稳态全光开关,分别以波长为375nm的紫外激光(CW,40mW)和波长为532nm的可见激光(CW,5 mW)作为激发光,以波长为632.8nm的He-Ne激光(CW,3μW)为探测光,实验研究并获得了薄膜样品的双稳态全光开关实验结果,开关信号的调制深度为8.2%,开关上升时间约为36s,下降时间约为47s。根据光致变色系统二能级理论,对全光开关的实验结果和机理作了较深入分析。本文的双稳态全光开关具有简单容易实现的特点,作为一种低速的双稳态全光开关有潜在应用价值。
The diarylethene (cis-1, 2-Dicyano) was synthesized using diarylethene 1, 2-bis (2,4,5-trimethyl-3-thienyl) ethene was doped into polymethylmethacrylate (PMMA) to make an organic doping thin film sample with a doping content of 10% The changes of photoluminescence (PL) characteristics of thin films were investigated. An all-optical thin film bi-stable all-optical switch was fabricated. Excited UV light with a wavelength of 375 nm (CW, 40 mW) and a visible laser with a wavelength of 532 nm The experimental results of the bistable all-optical switch with the wavelength of 632.8nm (CW, 3μW) as probe light were studied. The results show that the modulation depth of the switch signal is 8.2% and the switch-on time is about 36s, the fall time is about 47s. According to the two-level theory of photochromic system, the experimental results and mechanism of all-optical switch are analyzed in depth. The bistable all-optical switch in this paper is simple and easy to implement and has potential application as a low-speed bistable all-optical switch.