Polarization independent Fabry-Pérot filter based on polymer-stabilized blue phase liquid crystals with fast response time.
Polarization independent Fabry-Pérot filter based on polymer-stabilized blue phase liquid crystals with fast response time.
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DOI：
10.1364/oe.19.025441
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发表时间：
2011-12
期刊：
影响因子：
3.8
通讯作者：
Yanhang Chen;Chun-Ta Wang;Chin-Ping Yu;Tsung-Hsien Lin
中科院分区：
文献类型：
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作者：
Yanhang Chen;Chun-Ta Wang;Chin-Ping Yu;Tsung-Hsien Lin
这项工作展示了一种基于聚合物稳定的蓝相液晶(PSBPLC)的偏振无关的电可调法布里-佩罗(FP)滤光片。外加垂直电场可以沿光轴调制PSBPLC的有效折射率。因此，FP滤光片的波长调谐特性与入射光的偏振状态完全无关。PSBPLC的双折射变化受克尔效应引起的各向同性到各向异性转变的控制，因此基于PSBPLC的FP滤光片具有较短的响应时间。实验测得FP滤光片在可见光范围内的可调谐性和自由光谱范围分别为0.092 nm/V和16 nm，在近红外范围内分别为0.12 nm/V和97 nm，响应时间为亚毫秒级。这种快速响应的偏振无关的电调谐FP滤波器具有很大的实际应用潜力。
This work demonstrates a polarization-independent electrically tunable Fabry-Pérot (FP) filter that is based on polymer-stabilized blue phase liquid crystals (PSBPLCs). An external vertical electric field can be applied to modulate the effective refractive index of the PSBPLCs along the optical axis. Therefore, the wavelength-tuning property of the FP filter is completely independent of the polarization state of the incident light. The change in the birefringence in PSBPLCs is governed by Kerr effect-induced isotropic-to-anisotropic transition, and so the PSBPLCs based FP filter has a short response time. The measured tunability and free spectral range of the FP filter are 0.092 nm/ V and 16nm in the visible region, and 0.12nm/ V and 97nm in the NIR region, respectively, and the response time is in sub-millisecond range. The fast-responding polarization-independent electrically tunable FP filter has substantial potential for practical applications.