Electro-optically switched compact coupled photonic crystal waveguide directional coupler

Zablocki, Mathew J.; Sharkawy, Ahmed; Ebil, Ozgenc; Shi, Shouyuan; Prather, Dennis
February 2010
Applied Physics Letters;Feb2010, Vol. 96 Issue 8, p081110
Academic Journal
In this paper, we present a compact photonic crystal directional coupler in a silicon on insulator platform electro-optically switched at 150 kHz with a switching time of 620 ns under a low voltage operation of 2.9 V. The switch design utilizes a coupled photonic crystal structure designed to operate in the slow light regime. Switching is attained by modulating the coupling coefficient of the coupled photonic crystal waveguide system by using a p-i-n diode to modulate the carrier concentration with a density of ∼104 A/cm2 across the plane of the photonic crystal.


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