Liquid-crystal electric tuning of a photonic crystal laser

Liquid-crystal electric tuning of a photonic crystal laser

Spectrum of a photonic crystal nanolaser infiltrated with a liquid crystal tuned by changing the orientation of the liquid crystal.

Abstract:
An electrically tuned nematic liquid-crystal (LC) infiltrated photonic crystal (PC) laser is demonstrated. This PC laser represents an emerging class of nanoscale optical adaptive devices enabled by the convergence of nonlinear optical materials, electronics, and fluidics that promise increased functionality and utility over existing technologies. A LC cell is constructed by encasing the PC laser between two indium tin oxide glass plates, which serve as the modulating electrodes. Applying a voltage across the cell realigns the LC, modifies the laser cavity’s optical path length, and blueshifts the lasing wavelength.
B. Maune, M. Loncar, J. Witzens, M. Hochberg, T. Baehr-Jones, D. Psaltis, Y. Qiu, and A. Scherer, Liquid-crystal electric tuning of a photonic crystal laser, Appl. Phys. Lett. 85, 360-362 (2004).