New designs of a complete set of Photonic Crystals logic gates

Hussein, Hussein M. E.; Ali, Tamer A.; Rafat, Nadia H.

doi:10.1016/j.optcom.2017.11.043

Cited by 93 publications

(38 citation statements)

References 20 publications

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“…2 because the experimental design has a smaller T A . But, an SL of a few dB is still much smaller than in any other previous reports [8][9][10][11][12][13][14][15] . Figure 5c overlaps time waveforms of the AND operations of seven different λ (1535, 1540, 1545, 1550, 1555, 1560, and 1565 nm) denoted by the dots in Fig.…”

Section: Resultscontrasting

confidence: 64%

“…Various platforms (e.g., plasmonics [9][10][11][12] , photonic crystals 13,14 , and metasurfaces [15][16][17] , etc.) are now available for forming Ψ gates.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, there have been several proposals and some experimental demonstrations of optical logic operations employing linear optical components [7][8][9][10][11][12][13][14][15][16][17] . For example, a simple beam splitter can perform various types of approximate Boolean logic gates as a result of optical interference.…”

mentioning

confidence: 99%

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Ultrashort low-loss Ψ gates for linear optical logic on Si photonics platform

et al. 2020

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Nonlinear optical gates are usually considered as fundamental building blocks for universal optical computation. However, the performance is severely limited by small optical nonlinearity, thereby bounding their operation speed, consumption energy, and device size. In this paper, we propose and experimentally demonstrate linear optical logic operations with 3 μm-long Si wire "Ψ" gates consist of 3 × 1 optical combiners including auxiliary bias port, which maximizes the binary contrast of the output in telecom wavelength. We have demonstrated 20 Gbps Boolean "AND" operation with experimentally measured small signal loss (1.6 dB experimentally). A single Ψ gate can perform representative Boolean operations by changing the bias power and relative phases. We have also demonstrated wavelengthindependent operation by seven wavelengths, which leads to wavelength-division multiplexed parallel computation. This ultrashort, highly-integrable, low-loss, and energy-efficient optical logic gates pave the way for ultralow latency optical pattern matching, recognition, and conversion.

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Section: Resultscontrasting

confidence: 64%

“…Various platforms (e.g., plasmonics [9][10][11][12] , photonic crystals 13,14 , and metasurfaces [15][16][17] , etc.) are now available for forming Ψ gates.…”

Section: Resultsmentioning

confidence: 99%

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Ultrashort low-loss Ψ gates for linear optical logic on Si photonics platform

et al. 2020

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“…These structures offer considerable flexibility in the design of digital systems. In the study by Hussein et al [22], photonic crystal based on the interference effects for NOT and XOR logic gates. The structure made up of germanium dielectric rods in the air substrate, a ring resonator with two waveguide inputs and one output.…”

Section: Introductionmentioning

confidence: 99%

“…The dimensions of the structure are 14 μm in 11.1 μm, and the overall area is 155.4 μm 2 , and the contrast ratio for the XOR logic gate is 11.64 dB, and for the NOT logic gate, contrast ration is 12.15 dB. Also, Hussein et al [22] proposed a new design for the XNOR gate, with a surface area of 240.1 μm 2 , and the contrast ratio equal to 9.38 dB. In the studies by Rani et al [23,24], multifunctional PhC structures were designed using a triangular lattice of air holes in a Si substrate, The waveguide interference in the proposed structures has been used to create logic operations.…”

Section: Introductionmentioning

confidence: 99%

A novel proposal based on 2D linear resonant cavity photonic crystals for all-optical NOT, XOR and XNOR logic gates

Elhachemi

Naoum

2020

Journal of Optical Communications

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In this paper, we are going to propose a novel structure of all-optical NOT, XOR and XNOR logic gates are presented using a two-dimensional photonic crystal (2D-PhC). This structure is optimized by varying the radius of the cavity, to obtain a quality factor Q = 1192, and also has several ports of entry and one port of output. The size of each structure is equal to 85.8 μm2. The contrast ratios for the structures proposed all-optical NOT, XOR and XNOR logic gates between levels “0” and “1” are, respectively, 25.08, 25.03, and 14.47 dB. The response time for the three logical gates is 8.33 ps, and the bit rate is calculated at about 0.12 Tbit/s, all simulations are based on both numerical methods such as finite difference time domain (FDTD) and plane wave expansion (PWE). Designed logic gates are characterized by low power consumption, compactness and easy integration.

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Energy‐Saving High‐Bandwidth Perovskite Sub‐Micro‐Encoder

Liang

Zhong

Tang

et al. 2023

Advanced Optical Materials

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Optical coding is widely applied in communication and data processing fields due to its practical and powerful characteristics, such as high transmission rate and operational convenience. However, improvements in the loading information capacity of optical encoders always result in increased energy consumption. It is a challenge to realize an optical encoder that combines energy savings, high bandwidth, and miniaturization. Here, both the concept and the demonstration of a perovskite sub‐micro‐encoder with an 84% energy‐saving efficiency and a tunable bandwidth of up to 200 GHz are reported. The way to code the radiative dynamics of the light source allows for the reduction of unnecessary energy consumption from the initial stage through the control of the radiation core. Moreover, the miniature encoder generates code sequences of good coherence, stimulating the development of perovskite‐based optical microchips for ultrafast information processing.

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New designs of a complete set of Photonic Crystals logic gates

Cited by 93 publications

References 20 publications

Ultrashort low-loss Ψ gates for linear optical logic on Si photonics platform

Ultrashort low-loss Ψ gates for linear optical logic on Si photonics platform

A novel proposal based on 2D linear resonant cavity photonic crystals for all-optical NOT, XOR and XNOR logic gates

Energy‐Saving High‐Bandwidth Perovskite Sub‐Micro‐Encoder

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