Abstract

The performance of a multimaterial loop (MML) metasurface integrated with Kerr nonlinear material as the dielectric spacer layer is investigated comprehensively with the finite-difference time-domain method. Optical bistability is obtained by exciting the metasurface with a saw-tooth profile for its amplitude. Based on effects of coupling between the plasmonic loops on the performance of the MML metasurface, it is shown that there is a trade-off between the required input intensity for switching and the extinction ratio of the two states of the switch. Two distinct designs are proposed where in the second design, which has lower coupling, the extinction ratio is increased by a factor of 2 while the required intensity for switching is 13 times higher than that of the first design.

© 2014 Optical Society of America

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