Analysis of high-resolution electro-optical beam steering by long-range surface plasmon resonance using a ZnSe prism.

A proposal on high-resolution electro-optical beam steering is conceptualized analytically using a long-range surface plasmon resonance configuration comprising a liquid crystal layer of E44 for 1550 nm wavelength. With the tuning of the refractive index of E44 through variations of applied voltage from 0 to 10 V, an optical beam steering can be attained considering the composite effect of spatial and angular Goos-Hanchen and Imbert-Fedorov shifts. As compared with the existing beam shift processes in µrad by mechanical means, here, the computed angular resolution is 3.40 nrad. The proposed idea finds a new avenue in the field of pulse generation, optical sensor applications, and atomic force microscopy, mitigating existing drawbacks.