Implementation of optical logic gates using closed packed 2D-photonic crystal structure

Design of silicon slab waveguides based all‐optical logic gates

“…26 The proposed design uses three input ports and a single design for many binary logic operations based on the variation of phase and power of the input sources. Another widely investigated method to realize all-optical logic gates is the use of photonic crystals (PhC) for guiding the light as done by Chhipa et al, [27][28][29] Radhouene et al, 30 Ishizaka et al, 31 Parandin et al, 32 Rani et al, 33,34 Tripathy et al, 35 Zalevsky et al, 36 In this work, the proposed all-optical logic gates use silicon slab waveguides (SSWs). The light is guided in SSWs because of the total internal reflection of light into the waveguide.…”

The multiple physical quantity sensor based on cylindrical photonic crystals with XOR logic gates

“…In the field of multiphysical quantity detection, the linear optical effects have been used effectively to design optical logic gates, including interferometry, 23 semiconductor optical amplifiers, 24 Mach-Zender interferometers, 25 and nonlinear processes such as electrooptical effects. 26,27 Based on the strength of the PC fiber in polarization, a temperature-insensitive hydrogen sensor is designed by Yang et al, which in the scope of 1-4% hydrogen concentration has S = 131 pm%. 28 Besides, a 1D superstructure defect mode based on silicon, analyte, and silica layers was proposed by Sovizi et al, 29 as a method for refractive index (RI) sensors with perpendicular and 45 incidence angles with sensitivity (S) that has exceeded 450 and 600 nm RIU À1 .…”

Ultracompact all-optical logic gates based on nonlinear plasmonic nanocavities

“…However, the large size of the bulk ferromagnetic and lithium niobate crystals, of the order of several millimeters, is unsuitable for practical chip-integrated applications [10,11]. Various schemes have been proposed to demonstrate all-optical basic logic gates based on linear interference mechanisms (or thirdorder nonlinear optical effects) in photonic microstructures and plasmonic nanostructures, such as photonic crystals [12][13][14][15][16][17][18][19][20][21][22][23], microring resonators [24][25][26][27][28][29][30], nanobridges [31], graphene-oxide films [32,33], photonic and plasmonic nanowires [34][35][36], metamaterials [37][38][39], and semiconductor optical amplifiers [40,41]. The extremely high requirements placed on the light paths for the linear interference mechanism and relatively small third-order nonlinear susceptibility of conventional materials result in a low output logic state contrast of <10 dB and high signal intensities of several GW/cm 2 for basic all-optical logic gates.…”