Controlling the wave focal structure of metallic nanoslit lenses with liquid crystals
Abstract
The focusing properties of gold nanoslit lenses are controlled by changing the refractive index of liquid crystal fillings inside the nanoslits. When the liquid crystals are in the isotropic state, the nanoslit lenses have higher transmission than in the case when the liquid crystals are in the nematic state. Additionally, the lens that focuses TM-polarized light shows a sharper focus in propagation direction when liquid crystal is in isotropic state. Our numerical simulations show good agreement with our experimental results. Having external control over the focusing properties of nanoslit lenses could be beneficial for practical applications.
Keywords
NEGATIVE-INDEX; METAMATERIALS; TRANSMISSION; ARRAYS
DOI
10.1002/lapl.201110077
Citation
Laser Physics Letters, Volume 8, Number 11. 1 September 2011
Date of this Version
11-2011
Recommended Citation
Ishii, S; Kildishev, A V.; Shalaev, V M.; and Drachev, V P., "Controlling the wave focal structure of metallic nanoslit lenses with liquid crystals" (2011). Birck and NCN Publications. Paper 837.
http://dx.doi.org/10.1002/lapl.201110077