Ultra‐fast and compact all‐optical half adder using 2D photonic crystals

Seifouri, Mahmood; Olyaee, Saeed; Sardari, Mostafa; Mohebzadeh-Bahabady, Ahmad

doi:10.1049/iet-opt.2018.5130

Cited by 51 publications

(12 citation statements)

References 26 publications

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“…Width, length, and rod's radius are the main parameters that should take into consideration when building structures with this topology [77,78]. It can be existed in the following shapes cross over [79,80], T-shape [81], Y-shape waveguides [67,75,82,83].…”

Section: Photonic Crystal Decoder Topologiesmentioning

confidence: 99%

“…Furthermore, remarkable bit rate could be found from the same topologies (i.e., 1.27 Tbsp for cavity [81]) as shown in fig. 6, and 4.550 Tbsp for waveguide [83]. Table . IV was organized to display the main difference between the characteristics of (Ph.…”

Section: Photonic Crystal Half-adder Topologiesmentioning

confidence: 99%

“…This topology has some figure of merit such as the highest (CR) [54], high bit rate [66], and medium footprint [81]. As the material of the cavity rod can be nonlinear [83], so it can be operated in linear and nonlinear regime [83,89].…”

Section: The General Extracted Comparative Tablementioning

confidence: 99%

See 2 more Smart Citations

Appropriate Photonic Crystal Topology for Appropriate Applications

Mostafa

krosh²,

El-Rabie³

2022

Menoufia Journal of Electronic Engineering Research

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In this paper, different topologies were discussed and their effect on the design of photonic crystal applications was evaluated. They can be classified into four categories (i.e., ring resonator, selfcollimation, waveguide, and cavity-based structures). The figure of merits of each topology and its impact on design modules were explained and compared for two different applications (i.e., half-adder and decoder). Finite difference time domain (FDTD) and plane wave expansion methods are the two numerical approaches that were used to analyze the proposed designs. The truth table for each application was introduced. Comparison tables were organized to discriminate the valued characteristics for each structure. Based on the extracted tables, the appropriate topology can be chosen for the required design application according to the needed characteristic.

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Section: Photonic Crystal Decoder Topologiesmentioning

confidence: 99%

Section: Photonic Crystal Half-adder Topologiesmentioning

confidence: 99%

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Appropriate Photonic Crystal Topology for Appropriate Applications

Mostafa

krosh²,

El-Rabie³

2022

Menoufia Journal of Electronic Engineering Research

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“…can be designed based on photonic crystals, and many papers have been published in this eld . Structures in the eld of optical adders and subtractors using photonic crystals have also been reported [29][30][31][32][33][34][35]. Decoders and encoders based on photonic crystals have also been designed so far [36][37][38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Design of an Ultra-Compact and High-Contrast Ratio All-Optical NOR Gate

Parandin

Mahtabi

2021

Preprint

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In this research, an all-optical NOR gate is designed and simulated based on two-dimensional photonic crystals. A square lattice has been used to design this structure. This logic gate has two main inputs, a bias input and an output. Because the output of the NOR gate must be “1” for zero inputs, a bias input is required. One of the characteristics of this structure is its small size for use in optical integrated circuits. Also, in order to reduce the detection error in the output, it has been tried that the outputs have a suitable distance in two “0” and “1” logical states. The use of a small number and simple point defects makes the design of this gate easier. The simulation results show that the proposed structure is suitable for working at a wavelength of 1.55µm. Also, the amount of optical power at the output is high in the “1” logical mode and low in the “0” logical mode. This indicates that this structure has a reliable output for detecting logical values. In this paper, a photonic crystal structure is proposed to realize the NOR logic gate, which is small in size and uses simple linear and point defects. The use of very few point defects has made the design simpler and thus easier to build this gate. Due to these characteristics, this structure can be suitable for optically integrated circuits.

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“…All-optical logic gates have attracted the attention of researchers due to their application in all-optical processing, the realization of all-optical computers, and the development of ultra-fast communication networks. In recent years, with the introduction of photonic crystals as suitable substrates for the design of optical devices [1][2][3][4], designing all-optical logic gates with ultra-small sizes, low power consumption, and very high switching speed for use in optical integrated circuits has become possible [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Proposal of a Cascade Photonic Crystal XOR Logic Gate for Optical Integrated Circuits with Investigation of Fabrication Error and Optical Power Changes

Mohebzadeh-Bahabady

Olyaee

2021

Photonics

Self Cite

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A compact and simple structure is designed to create an all-optical XOR logic gate using a two-dimensional, photonic crystal lattice. The structure was implemented using three waveguides connected by two nano-resonators. The plane wave expansion method was used to obtain the photonic band gap and the finite-difference time-domain method was used to investigate the behavior of the electromagnetic field in the photonic crystal structure. Examining the high contrast ratio and high-speed cascade, all-optical XOR on a chip, the effects of fabrication error and the changes in the input optical power showed that the structure could be used in optical integrated circuits. The contrast ratio and data transfer rate of the cascade XOR logic gate were respectively obtained as 44.29 dB and 1.5 Tb/s. In addition, the designed structure had very small dimensions at 158.65 μm2 and required very low power to operate, which made it suitable for low-power circuits. This structure could also be used as a NOT logic gate. Therefore, an XNOR logic gate can be designed using XOR and NOT logic gates.

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Ultra‐fast and compact all‐optical half adder using 2D photonic crystals

Cited by 51 publications

References 26 publications

Appropriate Photonic Crystal Topology for Appropriate Applications

Appropriate Photonic Crystal Topology for Appropriate Applications

Design of an Ultra-Compact and High-Contrast Ratio All-Optical NOR Gate

Proposal of a Cascade Photonic Crystal XOR Logic Gate for Optical Integrated Circuits with Investigation of Fabrication Error and Optical Power Changes

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