Ultrafast all-optical switch using complex refractive index changes of thin films containing photochromic dye
Ultrafast all-optical switch using complex refractive index changes of thin films containing photochromic dye
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DOI：
10.1063/1.119571
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发表时间：
1997-07
影响因子：
4
通讯作者：
Kyoichi Sasaki;T. Nagamura
中科院分区：
文献类型：
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作者：
Kyoichi Sasaki;T. Nagamura
提出了一种基于银和含光致变色染料的聚合物薄膜复合薄膜中复折射率虚部光致变化的全光开关。利用光致变色螺吡喃掺杂的聚苯乙烯薄膜，以纳秒脉冲激光为写入光，在导波模式入射角下实现了阅读光的快速开关。这些响应是由光致变色引起的消光系数的变化引起的。不需要施加功率来保持切换状态。
An all-optical switch has been proposed based on photoinduced changes of an imaginary part of complex refractive index in a composite thin film made by silver and polymer thin films containing photochromic dye. Very fast switching on and switching off of a reading beam was demonstrated at the incident angle of guided wave mode using a photochromic spiropyran-doped polystyrene thin film and a ns pulsed laser as a writing beam. These responses were caused by the changes of an extinction coefficient due to photochromism. No applied power was required to hold the switched state.