High-speed optimisation of an all-optical half adder using a T-shaped photonic crystal waveguide with an improved contrast ratio

Rachana, Maddala; Swarnakar, Sandip; Priya, Noonepalle Hari; Krishna, Sabbi Vamshi; Sharma, Prabha Shankar; Kumar, Santosh

doi:10.1007/s12043-022-02398-9

Cited by 4 publications

(1 citation statement)

References 32 publications

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“…The PhCs may exhibit photonic bandgap (PBG), which means some or a band of frequencies of light are prohibited from propagating; in other words, the PhCs can operate as a perfect mirror comprised of dielectric materials. This special characteristic of PhCs that inhibits radiation losses may be used to implement several types of optical components like integrated optical waveguides, optical fibers, filters, couplers, power splitters, all-optical logical gates, and adders, among others [2][3][4]. Therefore, the demand for bandwidth in modern optical communication systems for the transmission and for processing of data in the optical domain requires the use of wideband optical devices such as couplers, waveguides, and modulators.…”

Section: Introductionmentioning

confidence: 99%

An Artificial Immune System Model Tightly Coupled to the Inverse Design of Photonic Crystals

Malheiros-Silveira

Rodríguez-Esquerre

2023

IEEE Access

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We propose a model based on an Artificial Immune System (AIS) to be used in conjunction with any electromagnetic solver in order to solve inverse design problems of integrated photonics. The proposed AIS was inspired by the Opt-aiNET algorithm coupled to a homemade electromagnetic solver based on the frequency domain Finite Element Method (FEM), which was used for calculating the fitness function. To validate the proposed model, we evaluate the photonic bandgap (PBG) of photonic crystals by the inverse design approach by assuming triangular lattices comprised of Si and air, and compared the results with other metaheuristics. The proposed AIS model is tightly coupled to such type of problem when the photonic structure is discretized in the binary-valued domain. Interestingly, different from many bioimmune-inspired metaheuristics, this proposed model has one of its metaheuristics parameters highly related to the characteristics of the application, which allows the algorithm itself to get a better "learning" of the problem and, additionally, reveals the designer some features intrinsic to the application. We have obtained midgap ratios of the first PBGs in triangular lattices of 47.55% and 49.11% for transversal magnetic (TM) and transversal electric (TE) polarizations, respectively. Additionally, the proposed model was applied to achieve large PBGs assuming the TM polarization in PhCs based on silicon carbide, and a new structure presented a PBG equals to 33.94%.

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Section: Introductionmentioning

confidence: 99%

An Artificial Immune System Model Tightly Coupled to the Inverse Design of Photonic Crystals

Malheiros-Silveira

Rodríguez-Esquerre

2023

IEEE Access

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Application of nonlinear kerr effect 2D PhC-based ring resonators for design all optical 4-bit adder

Ikhlef,

Badaoui,

Abri

2024

Opt Quant Electron

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Nanoscale plasmonic combinational logic circuits based on an elliptical resonator

2023

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The half-adder (HA) and half-subtractor (HS) plasmonic combinational logic circuits are explained using a finite element method with a COMSOL software package. The combinational circuits are created using insulator-metal-insulator technology with nanoscale plasmonic structures. In order to achieve an excellent transmission value, the phase angle of optical waves and the position of the control and input ports are the more crucial elements. In this design, the nanoscale combinational circuits are realized at a 35% transmission threshold to distinguish between the logic “0” and logic “1” stand on the interference between the input and control ports with 540nm×250nm dimensions and an 850 nm resonant wavelength. The modulation depth, contrast ratio, and insertion loss have 97.38%, and 11.84 and 3.3 dB for the HA, and they have 92.38%, and 7.12 and −1.41dB for the HS, respectively.

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High-speed optimisation of an all-optical half adder using a T-shaped photonic crystal waveguide with an improved contrast ratio

Cited by 4 publications

References 32 publications

An Artificial Immune System Model Tightly Coupled to the Inverse Design of Photonic Crystals

An Artificial Immune System Model Tightly Coupled to the Inverse Design of Photonic Crystals

Application of nonlinear kerr effect 2D PhC-based ring resonators for design all optical 4-bit adder

Nanoscale plasmonic combinational logic circuits based on an elliptical resonator

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