Hsiao Yu-Cheng, Tang Chen-Yu, Lee Wei
Department of Physics, Chung Yuan Christian University, Chung-Li 32023, Taiwan.
Opt Express. 2011 May 9;19(10):9744-9. doi: 10.1364/OE.19.009744.
A fast-switching bistable optical intensity modulator is demonstrated. Using a dual-frequency cholesteric liquid crystal, the direct switching is achieved from the scattering focal conic state to the transparent long-pitch planar state. In comparison with the bistable cholesteric devices proposed previously, our device, characterized by its capability of direct two-way transitions between the two bistable states, possesses a very short transition time from the focal conic state to the planar state as short as 10 ms. No voltage has to be applied to sustain the optical states, making the device low energy consuming. Potential applications of this device are addressed.
展示了一种快速切换的双稳态光强度调制器。利用双频胆甾相液晶，实现了从散射焦锥态到透明长间距平面态的直接切换。与先前提出的双稳态胆甾相器件相比，我们的器件具有在两个双稳态之间直接双向转换的能力，从焦锥态到平面态的转换时间非常短，短至10毫秒。无需施加电压来维持光学状态，使得该器件能耗低。还讨论了该器件的潜在应用。
