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All-optical bistable switching, hard-limiter and wavelength-controlled power source |
Mehdi SHIRDEL,Mohammad Ali MANSOURI-BIRJANDI() |
Faculty of Electrical and Computer Engineering, University of Sistan and Baluchestan (USB), Zahedan 98164-161, Iran |
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Abstract In this paper, an all-optical bistable switching operation of resonant-tunneling devices with ultra-small photonic crystal cavity was demonstrated. The whole structure was based on a square lattice photonic crystal formed by rods of refractive index nr=3.4 in an air background. The cavity was surrounded by eight nonlinear rods of refractive index nL0=3.1 and nonlinear Kerr coefficient n2=9×10−17 W/m2. Nonlinear finite difference time domain method was used to get a bistability hysteresis loop. Next, all-optical wavelength controlled power source (WCPS), hard-limiter and switching operation based on optical nonlinearity were shown. And that small cavity structure has a small length of 12 mm. Considering the numerous applications and small length, this proposed structure has various potential function in all-optical circuits.
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Keywords
all-optical
bistability
Kerr nonlinearity
photonic crystal cavity
switching
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Corresponding Author(s):
Mohammad Ali MANSOURI-BIRJANDI
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Online First Date: 18 February 2016
Issue Date: 29 November 2016
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