Surface plasmonic lightening characteristics through liquid crystal microlens arrays controlled electrically

An approach for representing and evaluating surface plasmonic lightening through cylindrical liquid crystal microlens arrays (CLCMAs) of 128×128, is proposed. The CLCMAs are typical sandwiched structures, in which the LC materials with a thickness of ~20μm is fully filled into a preshaped microcavity with a pair of parallel electrodes fabricated by silica wafers coated by an indium-tin-oxide (ITO) film. The top electrode is patterned using an arrayed micro-rectangle-hole with a size of 200×60μm2 and a minimum spacing of 50μm. The surface plasmonic radiation is excited and further participates the focusing of incident beams in the visible range. The output light fields involving the plasmonic radiation are investigated. Rising the voltage signal from ~1.4 to ~5.5VRMS, the excited plasmonic radiation will sequentially present typical states including the beam converging state, focusing together with partial incident beams, and lightening mainly along the edge of individual ITO micro-rectangle-hole.