Optical planar chiral metamaterial designs for strong circular dichroism and polarization rotation.
Planar chiral metamaterials comprising double-layer dielectricmetal- dielectric resonant structures in the shape of a gammadion are presented in the near-infrared regime. The unit cell of the doubly-periodic metamaterial design is optimized using the genetic algorithm for maximum circular dichroism and for maximum optical activity. A circular dichroism value in excess of 50% is predicted for the optimized design. Maximum polarization rotatory powers in terms of the minimum allowed transmittances are also obtained and presented.
Kwon
Do-Hoon
DH
Department of Electrical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA. dhw@psu.edu
Werner
Pingjuan L
PL
Werner
Douglas H
DH
D000465:Algorithms; D002942:Circular Dichroism / Q000295:instrumentation*; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008420:Manufactured Materials; D055095:Optics and Photonics / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*