Liquid crystal clad near-infrared metamaterials with tunable negative-zero-positive refractive indices

Author

• D H. Werner, Department of Electrical Engineering, The Pennsylvania State University
• Do-Hoon Kwon, Department of Electrical Engineering, The Pennsylvania State University
• Iam-Choon Khoo, Department of Electrical Engineering, The Pennsylvania State University
• Alexander V. Kildishev, Birck Nanotechnology Center, Purdue UniversityFollow
• V. M. Shalaev, Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue UniversityFollow

Abstract

Near-infrared metamaterials that possess a reconfigurable index of refraction from negative through zero to positive values are presented. Reconfigurability is achieved by cladding thin layers of liquid crystal both as a superstrate and a substrate on an established negative-index metamaterial, and adjusting the permittivity of the liquid crystal. Numerical results show that the index of refraction for the proposed structure can be changed over the range from -1 to +1.8 by tuning the liquid crystal permittivity from 2 to 6 at a wavelength of 1.4 mu m.

Citation

19 March 2007 / Vol. 15, No. 6 / OPTICS EXPRESS 3342

Date of this Version

March 2007

Recommended Citation

Werner, D H.; Kwon, Do-Hoon; Khoo, Iam-Choon; Kildishev, Alexander V.; and Shalaev, V. M., "Liquid crystal clad near-infrared metamaterials with tunable negative-zero-positive refractive indices" (2007). Birck and NCN Publications. Paper 249.
https://docs.lib.purdue.edu/nanopub/249