Investigation of light behavior of all optical full adders in two‐dimensional photonic crystals

Abstract

In this article, an optical full adder is investigated in terms of light flow inside the two‐dimensional (2‐D) crystal lattice waveguide structures. The phenomenon such as resonance, splitter, and combiner based on the principle of constructive and destructive interference is used in the modeling of all optical full adders. Also, defects are introduced in the junction of the waveguide structures to pass/stop light wave inside the waveguide structure. The designed full adder structure in 2‐D photonic crystals (PhCs) occupies an area of 382.91 μm2 and maximum light confinement at the Sum and Cout output ports are 0.52 and 0.6 arbitrary unit (a.u.), respectively. The response time of the full adder structure is about 0.25 ps and the maximum contrast ratio achieved at the Sum is 7.16 dB and Cout is 5.74 dB. RSoft FullWAVE simulation tool is used to perform a full‐vector simulation of photonic structures.

Terahertz Polarization Isolator Using Two-Dimensional Square Lattice Tellurium Rod Array

“…PhCs with photonic band gaps (PBGs) also have been used to design multiple devices for photovoltaic applications [ 13 ] like filters [ 14 ], routers [ 15 ], resonators [ 16 ], optical logic gates [ 17 ], adders [ 18 ], phase shifters [ 19 ] and some all-optical memory components [ 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. The PBGs of some different types of PhCs are generally calculated by the plane wave expansion method (PWEM) based on the Bandsolve module in Rsoftwave, which is a mathematical method used to expand a wave function or physical quantity into a linear combination of plane waves.…”

Wideband Microwave Photonic Circulator Using Two Asymmetric Partial-Height Triangle Ferrites

“…Since the photonic crystal (PhC) was first investigated [ 4 , 5 ], microwave photonic devices based on PhCs for high-frequency operations have drawn considerable concern and attracted much research [ 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. PhCs have been shown to be an effective medium for transmitting as well as controlling electromagnetic waves, which can readily facilitate the miniaturization and integration of devices at the same time [ 13 , 14 , 15 , 16 , 17 , 18 ].…”

Design of two-dimensional photonic crystal based ultra compact optical RS flip-flop

“…Optical logic gates are the major components used for signal processing in optical communication. In recent past, various optical logic gates like AND, NOT, OR, NOR and NAND [1][2][3][4][5][6], logic devices like adders [7,8], multiplexer, demultiplexer [9][10][11], decoders [12,13], filters [14] and counters [15] have been demonstrated. Complex structures such as flip-flops are constructed using combination of these logic gates.…”