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A fast optical switch for self-collimated beams in a photonic crystal with electromagnetically induced transparency media

Abstract: In this paper, a fast optical switch working at 1550 nm that has a very short response time on the order of picoseconds is proposed. The optical switch has a very compact size of 10.14x10.14 mu m(2) and a concise structure consists of 16x16 In1-xGa1-xAsyP1-y-InP rods in air. The structure of the switch is optimal designed by analyzing its equi-frequency contours and bandgaps. Its performance is confirmed by finite-difference time-domain simulations. The designed optical switch may find important applications in the photonic integrated circuits.