The authors demonstrate electrically controlled negative refraction at the interface between an isotropic material and a uniaxial nematic liquid crystal, in which the optic axis is designed to make a large angle with the interface. Depending on the applied voltage, the refracted beam is either on the opposite side of the interface normal as compared to the incident beam (positive refraction) or on the same side (negative refraction).
Applied Physics Letters
Copyright 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 89, 251103 (2006) and may be found at http://dx.doi.org/10.1063/1.2408658
Pishnyak, Oleg P.; Lavrentovich, Oleg (2006). Electrically Controlled Negative Refraction in a Nematic Liquid Crystal. Applied Physics Letters 89(25) doi: 10.1063/1.2408658. Retrieved from https://oaks.kent.edu/cpippubs/186