Optical interferometric logic gates based on metal slot waveguide network realizing whole fundamental logic operations

Pan, Deng; Wei, Hong; Xu, Hongxing

doi:10.1364/oe.21.009556

Cited by 98 publications

(69 citation statements)

References 18 publications

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“…This shows that the graphene plasmonic MZI logic gates are very efficient, having a minimum average extinction ratio between OFF/ON states of 15dB for all types of logic. In comparison to conventional MZI logic gates, especially for the NOR/AND and NAND/OR logics, they usually only have ~5dB extinction ratios [4,5]. We further show in Fig.…”

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confidence: 79%

“…Recently, a range of silicon-on-insulator optical logic gates has been designed based on the directed logic architecture, which includes the Mach-Zehnder interferometer (MZI) and microring resonator (MRR) types [4][5][6][7][8][9][10]. However, those logic gates have their own set of problems in certain logic-function implementations:In the AND/OR logic implementation for the MZI logic gate, there is a need for arbitrary definition of the ON/OFF threshold logic intensity levels [4,5]. This is due to the absence of cutoff states in the MZI logic gate architecture.…”

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confidence: 99%

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Electro-optical graphene plasmonic logic gates

et al. 2014

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Abstract:The versatile control of graphene's plasmonic modes via an external gate-voltage inspires us to design efficient electro-optical graphene plasmonic logic gates at the mid-infrared wavelengths. We show that these devices are superior to the conventional optical logic gates because the former possess both cutoff states and interferometric effects. Moreover, the designed 6 basic logic gates (i.e. NOR/AND, NAND/OR, XNOR/XOR) achieved not only ultra-compact size-lengths of less than λ/28 with respect to the operating wavelength of 10µm, but also a minimum extinction ratio of as high as 15dB. These graphene plasmonic logic gates are potential building blocks for future nanoscale mid-infrared photonic integrated circuits.In recent years, the mid-infrared wavelength is attracting a lot of research interests due to potential device applications in areas ranging from free-space telecommunications, sensing and medicine, to infrared countermeasures and reconnaissance [1,2]. One of the components which might be found ubiquitously in those devices would be the electronic logic for signal processing. However, due to its architecture, the electronic logic inherently experiences undesirable effects such as latency and racecondition glitches, which might compromise the safety and reliability of those devices.A better alternative would be to use the optical directed logic architecture [3], which has markedly-reduced gate propagation and state-change delays. The advantage of directed logic is prominently seen when logic gates are cascaded: because the gate and propagating signals are kept separate in directed logic, all gates can be switched simultaneously, very unlike electronic logic gates where their gate delays are cascaded. Consequently, the directed logic architecture can avoid many of the abovementioned undesirable effects associated with the electronic logic. Recently, a range of silicon-on-insulator optical logic gates has been designed based on the directed logic architecture, which includes the Mach-Zehnder interferometer (MZI) and microring resonator (MRR) types [4][5][6][7][8][9][10]. However, those logic gates have their own set of problems in certain logic-function implementations:In the AND/OR logic implementation for the MZI logic gate, there is a need for arbitrary definition of the ON/OFF threshold logic intensity levels [4,5]. This is due to the absence of cutoff states in the MZI logic gate architecture.(ii)The MRR logic gate is superior in the AND/OR logic implementation due to having cutoff states [7,9,10]. However, difficulties arise in the XOR/XNOR logic implementation due to its lack of interferometric effects. As such, implementing these logics in MRR would either require additional switches and/or strategic placement of the switches [6-8], or using two wavelength signals [9].In this Letter, we would like to introduce MZI-based graphene plasmonic logic gates as a common solution to the abovementioned problems. Specifically, we want to show that the graphene plasmonic MZI logic gate does not face ...

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Electro-optical graphene plasmonic logic gates

et al. 2014

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“…For the logic operations, the input light polarization and phase need to be controlled to guarantee efficient interference of SPs [80]. Optical logic gates based on plasmonic nanostructures were also investigated by simulations, and all fundamental logic operations AND, NOT, OR and XOR could be realized [81]. These results can be helpful for future integrated optical computing.…”

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confidence: 99%

Chemically synthesized noble metal nanostructures for plasmonics

Liang

Hong

Pan

et al. 2015

Nanotechnology Reviews

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Review: Some novel metal nanostructures synthesized by wet chemical methods and their fundamental plasmonic properties are discussed, and some applications of these nanostructures in plasmonics, including surface-enhanced Raman spectroscopy, plasmonic sensing, optical nanoantennas and plasmonic circuitry are highlighted. AbstractNoble metal nanostructures have drawn attention of researchers in many fields due to their particular optical properties. Controlling the metal nanostructures' size, shape, material, assembly and surrounding environment can tune their unique plasmonic features that are important for practical applications. In this review, we firstly discuss some novel metal nanostructures synthesized through wet chemical methods and their fundamental plasmonic properties. Then some applications of these chemically-synthesized nanostructures in plasmonics are highlighted, including surface-enhanced Raman spectroscopy, plasmonic sensing, optical nanoantennas and plasmonic circuitry. Plasmonic nanostructures provide the ways to manipulate light at the nanometer scale, and open the prospects of developing nanophotonic devices for sensing and information technologies.

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“…Recently, a number of schemes have been proposed to realize all-optical logic gates such as using dielectric (or metallic) waveguides, [3][4][5] nonlinear effects in optical fibers, [6][7] and semiconductor optical amplifiers. Recently, a number of schemes have been proposed to realize all-optical logic gates such as using dielectric (or metallic) waveguides, [3][4][5] nonlinear effects in optical fibers, [6][7] and semiconductor optical amplifiers.…”

Section: Introductionmentioning

confidence: 99%

All-optical AND, XOR, and NOT logic gates based on Y -branch photonic crystal waveguide

2015

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This paper presents all-optical AND, XOR, and NOT logic gates based on the light beam interference effect. Each logic gate is simply composed of a Y -branch waveguide with two input ports and one output port in the two-dimensional triangular-lattice photonic crystals. The designed logic gates are analyzed and simulated by the plane wave expansion and finite difference time-domain method. Simulation results show that the proposed all-optical structures really function as AND, XOR, and NOT logic gates, possess a small size of less than 11.6 μm × 13.8 μm and low power consumption. The contrast ratio of the proposed devices reaches 5.4 dB for the AND gate, 33 dB for the XOR and NOT gates, respectively, by precisely controlling the phase differences and properly choosing the size of the scattering rods.

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Optical interferometric logic gates based on metal slot waveguide network realizing whole fundamental logic operations

Cited by 98 publications

References 18 publications

Electro-optical graphene plasmonic logic gates

Electro-optical graphene plasmonic logic gates

Chemically synthesized noble metal nanostructures for plasmonics

All-optical AND, XOR, and NOT logic gates based on Y -branch photonic crystal waveguide

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