Sneh A, Liu J Y, Johnson K M
Opt Lett. 1994 Feb 15;19(4):305-7. doi: 10.1364/ol.19.000305.
We demonstrate a fast liquid-crystal analog phase modulator composed of a homeotropically aligned electroclinic chiral smectic liquid crystal. Pure phase modulation is obtained by electrical modulation of the refractive index of the liquid crystal. A refractive-index change of 0.045 can be obtained at a 5-micros switching speed with a 15-V/microm applied electric field by use of the commercial electroclinic chiral smectic liquid crystal mixture BDH764E. This results in a pi phase modulation depth at lambda = 0.633 microm in a device of 10-microm thickness.
我们展示了一种由垂直排列的电致倾斜手性近晶型液晶构成的快速液晶模拟相位调制器。通过对液晶折射率进行电调制可实现纯相位调制。使用商用的电致倾斜手性近晶型液晶混合物BDH764E，在施加15V/μm的电场时，能以5微秒的切换速度获得0.045的折射率变化。这在厚度为10μm的器件中，对于波长λ = 0.633μm产生了π的相位调制深度。
