Reflection resonance switching in metamaterial twisted nematics cell

• Published in: Optics express Vol. 21; no. 15; pp. 17492 - 17497
• Main Authors: Lee, Y U, Choi, E Y, Woo, J H, Kim, E S, Wu, J W
• Format: Journal Article
• Language: English
• Published: United States 29-07-2013
• Subjects: Equipment Design; Equipment Failure Analysis; Light; Liquid Crystals - chemistry; Liquid Crystals - radiation effects; Nanotechnology - instrumentation; Refractometry - instrumentation; Scattering, Radiation; Signal Processing, Computer-Assisted - instrumentation; Surface Plasmon Resonance - instrumentation
• ISSN: 1094-4087; 1094-4087
• DOI: 10.1364/oe.21.017492

Electric switching of reflection resonances at near-IR spectral range is experimentally demonstrated in a reflective metamaterial twisted nematic liquid crystal cell. Reflective metamaterial composed of nano-sized double-split ring resonator aperture is fabricated by a focused ion beam milling. Two-fold rotational symmetry of double-split ring resonators allows for two orthogonal polarization-dependent reflection resonances in the reflective metamaterial. With an external voltage of 10V across 12μm cell gap, a full switching is achieved between two reflection resonances. Dynamic measurements show the time constants of switch-on and switch-off are in the order of 100ms and 10ms, respectively.