Realization of an ultrafast all-optical Toffoli logic gate based on the phase relation between two second order nonlinear optical signals

Kazemi, Mehdi Mohammad; Tehrani, Alireza Mazaheri; Khan, Tahir Zeb; Namboodiri, M.N.; Materny, Arnulf

doi:10.1088/1054-660x/25/12/125402

Cited by 3 publications

(2 citation statements)

References 30 publications

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“…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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show abstract

“…The T-shaped junction is used to connect the three waveguide structures with each other. To examine the working of the designed logic gates, a finite difference time domain (FDTD) simulator is engaged, which utilizes the Maxwell equations for obtaining the exact analysis [52][53][54]. To know the optical features of the proposed structure, the photonic band gap and band structure have to be obtained and this is done by using the plane wave expansion (PWE) method.…”

Section: Introductionmentioning

confidence: 99%

2D- PhC based all optical AND, OR and EX-OR logic gates with high contrast ratio operating at C band

Geerthana¹,

SYEDAKBAR²,

Sridarshini³

et al. 2022

Laser Phys.

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In this article, photonic crystal (PhC) based all-optical logic gates, namely AND, OR and EX-OR have been explored and their characteristics are reported. Two-dimensional (2D) PhC based logic gates are proposed using a hexagonal lattice with T-shaped structure by incorporating line defects. The total size of the device is 84 µm2 and it operates at a wavelength of 1550 nm (C band). The designed optical logic gates are investigated using 2D finite difference time domain simulators by means of the plane wave expansion method. Parameters, such as response time and contrast ratio of the designed all-optic logic gates, are analyzed. The proposed AND, OR and EX-OR logic gates offer a contrast ratio of 14.48 dB, 14.57 dB and 12.9 dB respectively with, in order, response times of 0.159 ps, 0.168 ps and 0.1672 ps. The designed logic gates work in the third optical window as they are operating at the 1550 nm wavelength. To specify the performance of the proposed logic gates, their field distribution has been determined and is exhibited. The designed logic gates are suitable for use in photonic integrated circuits, all optical computing and optical sensing applications.

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Optical chaotic flip-flop operations with multiple triggering under clock synchronization in the VCSEL with polarization-preserved optical injection

Zhong¹,

Yang²,

Zeng³

et al. 2020

Opt. Express

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We investigate the evolution of nonlinear dynamic behaviors of two polarization components (x-PC and y-PC), as well as the interplay of polarization bistability and injection strength in the vertical-cavity surface-emitting laser (VCSEL) with polarization-preserved optical injection. We explore a new threshold mechanism to judge two logic outputs encoded in different dynamic behaviors of the x-PC and y-PC emitted by the VCSEL with polarization-preserved optical injection. We demonstrate implementations of two parallel optical chaotic reset-set flip-flop operations and two parallel chaotic toggle flip-flop operations that are synchronized by a clock signal and response for as short as 1 ns bit time. We further observe the reconfiguration of these two kinds of flip-flop operations with clock synchronization in different time periods by controlling the duration-time of the reset (toggle) signal with high-level. The probability of the correct trigger responses for these two kinds of flip-flop operations is controlled by the interplay of the duration-time of the reset (toggle) signal and the noise strength of the spontaneous emission. The probability that is equal to 1 for the reset-set flip-flop operations occurs in the long duration-time of the reset (toggle) signal ranging from 480 ps to 592 ps. The probability with 1 for the toggle flip-flop operations takes place in the short duration-time between 116 ps and 170 ps. Moreover, these two kinds of flip-flop operations have strong robust to the spontaneous emission noise. The optical chaotic flip-flop operation device with clock synchronization and reconfigurable trigger function proposed in our scheme offers interesting perspectives for applications where noise is unavoidable and synchronized multiple triggering is required.

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Realization of an ultrafast all-optical Toffoli logic gate based on the phase relation between two second order nonlinear optical signals

Cited by 3 publications

References 30 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

2D- PhC based all optical AND, OR and EX-OR logic gates with high contrast ratio operating at C band

Optical chaotic flip-flop operations with multiple triggering under clock synchronization in the VCSEL with polarization-preserved optical injection

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