Novel All-Optical Logic Gates Based on Photonic Crystal Structure

Noshad, Mohammad; Abbasi, Amirali; Ranjbar, Reza; Kheradmand, Reza

doi:10.1088/1742-6596/350/1/012007

Cited by 18 publications

(7 citation statements)

References 22 publications

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“…The micro ring resonators have excellent features, such that the original power can build up in the micro ring and keep circulating inside the ring cavity [26]. The nonlinear Kerr effect was effectively used to design various important optical devices like ring-resonatorbased optical logic gates [27,28], digital to analog converters and 2-to-4 decoders [29][30][31]. An all-optical half adder [32] and a Toffoli gate [33] were studied using the interference effect.…”

Section: Theoretical Analysis Of the Ring Resonatormentioning

confidence: 99%

Photonic-crystal-based design and FDTD simulation of all-optical NAND and NOR gates with improved contrast ratio

Anusooya¹,

Ponmalar²,

Manikandan³

2021

Laser Phys.

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The proposed research reports the simulation of a photonic crystal (PhC) ring-resonator-based full-optical NAND and NOR gate design. The designed structure comprises a 18 × 30 square lattice dielectric silicon rod-type PhC with a refractive index of n = 3.46. An interatomic distance ‘a’ of 560 nm, radius ‘r’ of 0.21a (0.133 μm) and input wavelength λ = 1550 nm with an input signal amplitude of 1 volt are used in this design. The proposed structure provides two large band gaps in Transverse Electric polarized mode in the ranges of 1342–1980 nm and 758–779 nm. Similar parameters are used for both NAND and NOR logic gate designs. The functionality of the proposed full-optical gates depends on the ring resonator principle and the intensity of the incident light. Numerical analysis of the simulation is based on the finite difference time domain method, whereas band gap analysis is performed using the plane wave expansion method.

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Section: Theoretical Analysis Of the Ring Resonatormentioning

confidence: 99%

Photonic-crystal-based design and FDTD simulation of all-optical NAND and NOR gates with improved contrast ratio

Anusooya¹,

Ponmalar²,

Manikandan³

2021

Laser Phys.

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“…[1] These logic gates are basically used to perform various functions at the nodes of the network such as pattern recognition, pattern matching, data encoding and decoding and also various switching operations. [2][3] With the development of telecommunication systems for high data transfer speed and capacity, there is a lot of demand for optical signal processing. In the past decade, all-optical signal processing techniques have attracted the attention of many researchers.…”

Section: Introductionmentioning

confidence: 99%

“…Today, Photonic Crystal (PhCs) [12] based technology attracts the scientist and researchers for the realization of optical devices for next generation of Photonic Integrated Circuits (PICs), [1][2][3] which DOI: 10.1002/masy.202000341 can be implemented in micrometer size instead of centimeter and millimeter size. It is believed that the PhC can be used as a building block for constructing future generation ultra-fast optical integrated circuits.…”

Section: Introductionmentioning

confidence: 99%

A Novel Design of All Optical Logical AND Gate Based on 2‐D Photonic Crystal

Shukla

Pandey

2021

Macromolecular Symposia

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All‐optical logic AND gate is realized based on two dimensional photonic crystal composed of Si rods in air. The structure proposed is designed with T‐junction using line defect and point defect in the crystal. Plane‐wave expansion and finite difference time domain methods are used to simulate and analyze the performance of the proposed AND gate. The size of the logic gate is only about 18 µm x 18 µm and it works in the 1550 nm wavelength. The contrast ratio obtained for this structure is 11db. The band diagram obtained for this structure gives a good forbidden band gap in the normalized frequency range of 0.264783 ≤ (1/λ) ≤ 0.4213565 for transverse electric mode. Therefore, band gap width is 0.1247972. The simplicity and the small sized T‐shaped structure along with high contrast ratio make this device suitable candidate for integration in optical communication.

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“…Besides all these frequency ranges light can propagate throughout the structure. The name photonic crystal is etched as photonic is related for action on light and crystal is related for periodicity of structure [2]. The periodicity occur when wavelength is greater than period.…”

Section: Introductionmentioning

confidence: 99%

Study of Quality Factor of Silicon Based NOT Logic Gate Using FDTD

Joseph¹,

Kalyani²

2014

2014 International Conference on Computational Intelligence and Communication Networks

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This paper presents a design of optical-NOT logic gate with air as a substrate and Silicon is used as the dielectric for rods fabricated with photonic crystal with dielectric constant of 11.49 and lattice constant of .5943 and works at wavelength of 1700nm.The radius of rods is 0.2a produced on a wafer of size 12μm x 12μm.The behavior of this logic gate is studied by finite difference time domain method (FDTD) and photonic band gap is calculated by PWE method. The quality factor of our NOT logic gate is 1559.

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Novel All-Optical Logic Gates Based on Photonic Crystal Structure

Cited by 18 publications

References 22 publications

Photonic-crystal-based design and FDTD simulation of all-optical NAND and NOR gates with improved contrast ratio

Photonic-crystal-based design and FDTD simulation of all-optical NAND and NOR gates with improved contrast ratio

A Novel Design of All Optical Logical AND Gate Based on 2‐D Photonic Crystal

Study of Quality Factor of Silicon Based NOT Logic Gate Using FDTD

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