Modeling and Optimization of Optical Half Adder in Two Dimensional Photonic Crystals

Sonth, Mahesh V.; Soma, Savita; Gowre, Sanjay Kumar; Biradar, Nagashettappa

doi:10.1007/s11664-018-6310-x

Cited by 23 publications

(7 citation statements)

References 3 publications

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“…Four inputs and two outputs encoder is designed with one control input which helps to produce output corresponding to the input and prevents the outputs when it is OFF.The logic blocks designed in two dimensional (2D) photonic crystals (PhCs) can be modeled using nite difference time domain (FDTD) computational method. The investigation of light behavior in 2D PhCs for all optical devices such as adders [2] and add-drop lters using cavity based ring resonators [3] and waveguides [4] is the basic idea for the encoder design. The optical encoders designed by various authors have been studied for the design of our present work.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of 4x2 Optical Encoder using Waveguides and Defects Mechanism in Two Dimensional Photonic Crystals

Gogga¹,

Gowre²,

Sonth³

et al. 2022

Preprint

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The proposed encoder in two dimensional photonic crystals is analyzed interms of flow of light inside waveguides. Waveguides have been created by removing silicon rods in the structure and defects with smaller radii have been created to achieve the proper couplers operations. The photonic band gap of the proposed encoder is determined and their performance is evaluated using finite difference time domain method. The proposed design has an optical output power threshold range between 76-94% for ON state and threshold level of OFF state is below 20%. The proposed encoder is operated in the wavelength of 1550 nm. Hence, it is applicable for high speed optical integrated circuit. The response time and contrast ratio calculated from the proposed encoder are 0.24 ps and 8.59 dB which are comparatively better than the literature reported with compare to footprint area of the proposed encoder.

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Section: Introductionmentioning

confidence: 99%

Design and Analysis of 4x2 Optical Encoder using Waveguides and Defects Mechanism in Two Dimensional Photonic Crystals

Gogga¹,

Gowre²,

Sonth³

et al. 2022

Preprint

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“…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.…”

Section: Introductionmentioning

confidence: 99%

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

Soma

Sonth²,

Gowre³

2021

Photon Netw Commun

Self Cite

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The presented research deals with designing of a new ultra compact all-optical RS flip-flop on a two-dimensional (2-D) hexagonal photonic crystal platform. The flip-flop is designed by using two NOR gates, photonic crystal waveguides, four silicon ring resonators, four input ports and two output ports. The designed flip-flop structure has hexagonal silicon rods in the air host with a lattice constant a of 630 nm. Si rods have a radius of 0.2a and operating waveleangth of 1550 nm. The novel design provides proper distinction between logic 1 and logic 0 at the output by giving 8.7 dB and 4 dB contrast ratio at Q and Qbar output, respectively. Furthermore, uncomplicated structure resulting in small dimension of 28 μm * 28 μm makes it appropriate for optical integrated circuit in optical networks. FDTD method is used to model the proposed structure and simulated using RSoft FullWAVE simulator tool.

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“…The contrast ratio of this structure is about 5.6 dB. Sonth et al [21] proposed an optical half adder based on interference in a two-dimensional photonic crystal structure using four Tshaped waveguides and 180°phase shift inputs. It is composed of a square lattice of dielectric rods, in which some rods are not located at the original lattice site.…”

Section: Introductionmentioning

confidence: 99%

All‐optical half adder based on non‐linear triangular lattice photonic crystals with improved contrast ratio

Saadi

Kashaninia

Sabbaghi‐Nadooshan

2021

IET Optoelectronics

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An all‐optical half adder based on two‐dimensional photonic crystals is proposed. The proposed structure is composed of a triangular array of dielectric rods made of non‐linear optical material in air. The structure consists of four waveguides and one ring resonator which are formed by removing a number of dielectric rods. The structure has been simulated and analysed by the plane wave expansion method and the finite‐difference time‐domain method. The size of the proposed structure is small with dimensions of 17 μm × 14.8 μm, and the material of the rods and lattice constant are uniform across the structure. The proposed half adder has a minimum contrast ratio of 13.51 dB in the steady state, with a maximum time delay of 2 ps.

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Modeling and Optimization of Optical Half Adder in Two Dimensional Photonic Crystals

Cited by 23 publications

References 3 publications

Design and Analysis of 4x2 Optical Encoder using Waveguides and Defects Mechanism in Two Dimensional Photonic Crystals

Design and Analysis of 4x2 Optical Encoder using Waveguides and Defects Mechanism in Two Dimensional Photonic Crystals

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

All‐optical half adder based on non‐linear triangular lattice photonic crystals with improved contrast ratio

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