All-optical logic gates based on cross-phase modulation in an asymmetric coupler

Li, Qiliang; Yuan, Hongliang

doi:10.1016/j.optcom.2014.01.006

Cited by 15 publications

(5 citation statements)

References 23 publications

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“…However, the large size of the bulk ferromagnetic and lithium niobate crystals, of the order of several millimeters, is unsuitable for practical chip-integrated applications [10,11]. Various schemes have been proposed to demonstrate all-optical basic logic gates based on linear interference mechanisms (or thirdorder nonlinear optical effects) in photonic microstructures and plasmonic nanostructures, such as photonic crystals [12][13][14][15][16][17][18][19][20][21][22][23], microring resonators [24][25][26][27][28][29][30], nanobridges [31], graphene-oxide films [32,33], photonic and plasmonic nanowires [34][35][36], metamaterials [37][38][39], and semiconductor optical amplifiers [40,41]. The extremely high requirements placed on the light paths for the linear interference mechanism and relatively small third-order nonlinear susceptibility of conventional materials result in a low output logic state contrast of <10 dB and high signal intensities of several GW/cm 2 for basic all-optical logic gates.…”

Section: Introductionmentioning

confidence: 99%

Ultracompact all-optical logic gates based on nonlinear plasmonic nanocavities

Yang

et al. 2016

Nanophotonics

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Abstract:In this study, nanoscale integrated all-optical XNOR, XOR, and NAND logic gates were realized based on all-optical tunable on-chip plasmon-induced transparency in plasmonic circuits. A large nonlinear enhancement was achieved with an organic composite cover layer based on the resonant excitation-enhancing nonlinearity effect, slow light effect, and field confinement effect provided by the plasmonic nanocavity mode, which ensured a low excitation power of 200 μW that is three orders of magnitude lower than the values in previous reports. A feature size below 600 nm was achieved, which is a one order of magnitude lower compared to previous reports. The contrast ratio between the output logic states "1" and "0" reached 29 dB, which is among the highest values reported to date. Our results not only provide an onchip platform for the study of nonlinear and quantum optics but also open up the possibility for the realization of nanophotonic processing chips based on nonlinear plasmonics.

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Section: Introductionmentioning

confidence: 99%

Ultracompact all-optical logic gates based on nonlinear plasmonic nanocavities

Yang

et al. 2016

Nanophotonics

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“…Jensen analyzed the NLDC theoretically in 1982 and therefore he foresaw the use of a nonlinear directional coupler as an optical switch [11]. The NLDCs have diverse applications, such as dispersion compensation modules [12], optical power splitters [13] and nonlinear optical switches [14][15][16][17]. One of the most widely used applications is as a logic gate.…”

Section: Introductionmentioning

confidence: 99%

All-optical logic gates based on wavelength conversion in a nonlinear directional coupler

Zhang

Li³

et al. 2015

Optics Communications

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“…In 2005, Fujisawa and Koshiba proposed design of optical gate with help of coupler of slotted waveguide and they realize it by optical directional coupler [6]. In 2014 Qiliang and Hongliang gave the design of optical gates by cross phase modulation with an asymmetric coupler and it realize by nonlinear fiber coupler with XPM of pump [7]. In 2012 J. F. Tao et al introduced the design of the optical logic gate by gradient optical force and it design with free-hanging silicon double ring resonator [1].…”

Section: Introductionmentioning

confidence: 99%

A novel design of optical logic gate AND, OR and NOT with Polyvinyl-Chloride Multiwalled Carbon Nano Tube

Desani

Bavarva

Sorathiya

2015

2015 International Conference on Advances in Computing, Communications and Informatics (ICACCI)

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Faster computation requires higher speed and higher data rate for digital circuits. To achieve this requirement photonics digital circuits are one of the solutions. Here we represent the design of AND, OR and NOT optical logic gate with Polyvinyl-Chloride MuItiwalled Carbon Nano Tube (PVC MWCNT) waveguide. PVC-MWCNT material was chosen for better constant optical response over 800nm to lOOOnm wavelength. It was also beneficial to achieve smaller sized waveguide design. The logic gates are designed in lOJlm x 4.5Jlm size. All the optical operation and truth tables were followed as digital circuits for given wavelength span. Here the logic gates are investigated with Finite Differentiation Time Domain (FDTD) method. Comparisons with available logic gate designs are also reported in this research. All the logic gates are compatible for the further expansion for logic circuits. One of the Boolean functions is formatted by proposed logic gates and analyzed the research work.

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All-optical logic gates based on cross-phase modulation in an asymmetric coupler

Cited by 15 publications

References 23 publications

Ultracompact all-optical logic gates based on nonlinear plasmonic nanocavities

Ultracompact all-optical logic gates based on nonlinear plasmonic nanocavities

All-optical logic gates based on wavelength conversion in a nonlinear directional coupler

A novel design of optical logic gate AND, OR and NOT with Polyvinyl-Chloride Multiwalled Carbon Nano Tube

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