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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Ultrafast all-optical spatial light modulation based on complex refractive index changes of copper phthalocyanine-doped polymer film upon photoexcitation in guided mode geometry
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Ultrafast all-optical spatial light modulation based on complex refractive index changes of copper phthalocyanine-doped polymer film upon photoexcitation in guided mode geometry

机译：基于导模几何中铜酞菁掺杂的聚合物薄膜在光激发时的复杂折射率变化而实现的超快全光学空间光调制

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Ultrafast all-optical reflectance control was achieved by photoinduced complex refractive index changes in thin poly(vinyl alcohol) (PVA) films containing water-soluble phthalocyanine at the incident angle corresponding to a sharp guided mode resonance upon excitation with a ns pulsed laser as a writing beam. The rise time of reflectance was less than 20 ns and the fall time was controlled by the lifetime of the excited triplet phthalocyanine, 31 ns for copper phthalocyanine (CuPcS). The spatial resolution was determined to be better than about 3 mum by using a photochromic dye. The present system based on photoexcitation of CuPcS will allow all-optical spatial light modulation upto about 30 MHz. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 23]
机译：超快全光反射率控制是通过在包含水溶性酞菁的聚乙烯醇（PVA）薄膜中通过光诱导的复杂折射率变化来实现的，该薄膜的入射角对应于在被ns脉冲激光激发时的尖锐引导模式共振。书写束。反射率的上升时间小于20 ns，下降时间由激发的三重态酞菁的寿命控制，对于铜酞菁（CuPcS），寿命为31 ns。通过使用光致变色染料，确定空间分辨率优于约3μm。基于CuPcS的光激发的本系统将允许高达约30MHz的全光学空间光调制。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：23]

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