Journal
JOURNAL OF MODERN OPTICS
Volume 65, Issue 21, Pages 2326-2331Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500340.2018.1508771
Keywords
All-optical logic gates; Kerr effect; Micro-ring resonator; Optical switching; Photonic crystal; High extinction ratio; Low switching power
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In this paper, we have proposed AND and XOR logic gates simultaneously in one structure. The presented structure is based on two-dimensional (2D) nonlinear photonic crystal with T-shaped waveguide and micro-ring resonator. In the proposed structure, the power consumption is 2.5 x 107 W/mthat is lower than similar logic gates and the extinction ratio is about 6.5 dB. Also, the switching time is attained to be 0.2 and 0.26 ps for AND and XOR logic gates, respectively. Simplicity and small size (18.4 mu mx18.4 mu m) of the structure make it suitable for photonic integrated circuits (PICs). All simulations are based on finite-difference time-domain (FDTD) and plane wave expansion (PWE) numerical methods.
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