Keywords: photonic crystals, photonic crystal waveguides, photonic bandgap matials, optical logic devices. Thus, it is favorable for use in optical communication system and optical signal processor. This NOR structure has an operating bandwidth of 40 nm. Since non linear material is not used, the power consumption is less.

The contrast ratio is 15.97 dB for NOR gate. The operation of NOR gate is numerically demonstrated using FDTD simulation.

With the optimized parameters, both the gates are combined without using any external device to design the NOR gate. The size of NOT and OR structures are 1010 m. The contrast ratio for logic NOT gate is 11.605 dB and for OR gate is 22.113 dB. The structure is optimized by iterative process. The layout of logic NOT and OR gate are simulated and analysed individually using Finite Difference Time Domain method. The two different cross waveguide structures are logic NOT and OR gate. Optical Fiber Communication Research Laboratory (OFCR Lab), ECE Department, Thapar University, Patiala 147004, IndiaĪn optical NOR gate is presented based on two different cross waveguide structures in 2D photonic crystal. © 2017 Deeksha Rani, Rajinder Singh Kaler, Balveer Painam

Not and or logic