A fast electro-optic shutter is fabricated and demonstrated. The device works independently of the polarization state of the incoming light beam. Modulation between 3% transmission and 60% transmission is obtained within a wavelength range of 50 nm with a response time of 20 mu s. The device consists of two partly polymerized chiral nematic liquid crystal layers separated by a half wave plate. The transmission modulation is due to a 50 nm wavelength shift of the photonic band gap of the chiral liquid crystal realized by applying an electric field over a mixture of photo-polymerized LC and non-reactive nematic LC containing a chiral dopant. The shutter features high reflectivity in the photonic band gap. We investigate the influence of the amplitude of the applied voltage on the width and the depth of the reflection band. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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机译：制造并演示了一种快速电光快门。该设备的工作与入射光束的偏振状态无关。在50 nm的波长范围内以20 s s的响应时间获得3％透射率和60％透射率之间的调制。该装置由被半波片隔开的两个部分聚合的手性向列液晶层组成。透射调制是由于通过在包含手性掺杂剂的光致聚合LC和非反应性向列型LC的混合物上施加电场而实现的，手性液晶的光子带隙的波长偏移为50 nm。快门在光子带隙中具有高反射率。我们研究施加电压的幅度对反射带的宽度和深度的影响。 （C）2015年作者。除另有说明外，所有文章内容均根据知识共享署名3.0未移植许可证进行许可。
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