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Optical metawaveguides for integrated photonics and beyond
2021年11月22日· The integration of subwavelengthstructured metasurfaces and metamaterials on the canonical building block of optical waveguides is graduallyPublisher: IEEE Photonic crystal (PhC) waveguides and cavities are widely used structures for enhancement of output for photonic integrated devices In this paper, wePhotonic Crystal Waveguide and Cavities for allOptical Logic
Crystals | Free FullText | Photonic Crystal Waveguides Composed
2023年9月18日· This study introduces an innovative integration of hyperbolic metamaterials (HMMs) and photonic crystals (PtCs), each possessing unique dispersion properties2023年7月2日· 1 Altmetric Metrics Abstract A 2 × 2 photonic crystal (PC) wavelength router unit (WRU) is proposed Different from traditional WRUs composed of a crossXshaped Photonic Crystal Waveguide with PhaseChange
Integrated IIIV Photonic Crystal – Si waveguide platform
2015年11月16日· Here, we propose a novel approach to heterogeneously integrate arrays of twodimensional photonic crystal defect cavities on top of silicononinsulator2021年6月23日· A twodimensional photonic crystal waveguide with thermally tunable photonic bandgap is proposed The tunability of the photonic bandgap is achieved byAnalyzing twodimensional tunable photonic crystal
Photonics | Free FullText | Recent Progress in Photonic Crystal
2023年10月27日· Photonic crystal waveguides (PCWs), a class of 2D PhCbased devices, offer an intriguing framework for making use of slow light effects The large2023年10月31日· Title: Analysis to closed surfacewave photonic crystal waveguides based on coupledresonator optical waveguide theory Abstract: Traditionally, one canAnalysis to closed surfacewave photonic crystal waveguides
Topology Optimization of LowLoss ZBend 2D
2023年2月13日· Based on this feature, photonic crystal waveguides (PCW) can be designed with low loss and high transmission efficiency which is applied to many kinds of photoelectronic devices [10,20,21,22,23] InAbstract: Photonic crystals offer an ideal platform for onchip absorption spectroscopy through engineering and enhancing light matter interaction Using photonic crystal waveguides, we experimentally demonstrate parts per million and parts per billion level detection of different gas speciesMidInfrared Trace Gas Sensing Using Photonic Crystal Waveguides
Photonic Crystal Waveguide an overview | ScienceDirect Topics
The outofplane radiation loss as a function of normalized frequency for the photonic crystal defect slab waveguides illustrated in Figures 6–8 The lattice constant a = 450 nm for deeply etched waveguide and 420 nm for the rest of the cases Points are calculated values and lines are Bspline curve fits Table 12021年6月23日· A twodimensional photonic crystal waveguide with thermally tunable photonic bandgap is proposed The tunability of the photonic bandgap is achieved by the temperature dependence of the refractive index of the slab A hexagonal lattice with a lattice shift is used as a twodimensional photonic crystal waveguide The shift of theAnalyzing twodimensional tunable photonic crystal waveguides
Photonic crystal optical parametric oscillator | Nature Photonics
2020年12月21日· Photonic crystalbased optical parametric oscillators have remained elusive Combrié, S, Colman, P & De Rossi, A Photonic crystal membrane waveguides with low insertion losses Appl PhysWe propose a simple analytical theory for lowindex core photonic bandgap optical waveguides based on an antiresonant reflecting guidance mechanism We identify a new regime of guidance in which the spectral properties of these structures are largely determined by the thickness of the highindex layers and the refractiveindex contrastAntiresonant reflecting photonic crystal optical waveguides
Broadband and lossless lithium niobate valley photonic crystal
niobate valley photonic crystals By increasing the size difference of two air holes in the same unit cell, we find that the bandwidth of the lossless nontrivial edge state possesses a peak value of 00201(a/λ), which can be used to construct broadband valley photonic crystal waveguides2020年11月9日· Significance HighQ mechanical modes of transverse oscillation at a few megahertz are characterized for a photonic crystal waveguide (PCW) consisting of parallel dielectric nanobeams The transduction of thermally excited motion of 33 p m at 300 K results in phase modulation with high signaltonoise ratio for light propagating in aCoupling of light and mechanics in a photonic crystal waveguide
Slowlightenhanced gain in active photonic crystal waveguides
2014年9月30日· Passive photonic crystals have been shown to exhibit a multitude of interesting phenomena, including slowlight propagation in linedefect waveguides It was suggested that by incorporating an光子晶体（Photonic crystals, PCs）是由具有不同折射率的两种或两种以上的材料周期性排列而成的光学微结构，其周期尺度与波长可比拟[1]。 由于折射率在空间上具有周期性分布，类比电子晶体中的电子能带，光子晶体也将形成光子能带，从而具有光子带隙（Photonic band gaps, PBGs）。光学微结构简介（《光学微结构及其应用》专栏的
Bandstructure of photonic crystal waveguide Line defect
When photonic crystals are used to make waveguides, the calculation of the photonic bandstructure becomes a 1 dimensional problem since the waveguide structure is only periodic in the direction of propagation In this example we calculate the bandstructure and mode loss of the waveguide structure described in K Ogawa et al Simulation setupGraphene has been widely used in siliconbased optical modulators for its ultrabroadband light absorption and ultrafast optoelectronic response By incorporating graphene and slowlight silicon photonic crystalDoublelayer graphene on photonic crystal
Hybrid topological photonic crystals | Nature Communications
2023年7月25日· Yan, B et al Multifrequency and multimode topological waveguides in Stampflitriangle photonic crystal with large valley Chern numbers Preprint at arXiv: (2021)2021年1月18日· Topological photonic crystal waveguides can create edge states that may be more robust against fabrication disorder, and can yield propagation modes below the light line We present a fully threedimensional method to modify stateoftheart designs to achieve a significant bandwidth improvement for lossless propagation Starting from anInverse design of broadband and lossless topological photonic crystal
Xshaped Photonic Crystal Waveguide with PhaseChange
2023年7月2日· A 2 × 2 photonic crystal (PC) wavelength router unit (WRU) is proposed Different from traditional WRUs composed of a cross waveguide and one or two microring resonators, it only consists of a single Xshaped cross waveguide The refractive index of four key PC rods produced with a phasechange material can be adjusted to realize a2016年3月31日· Figure 4: Experimental demonstration of spin readout in photonic crystal waveguides ( a ) Photoluminescence spectra of QDs with high contrast in PhC WGs ( b ) Experimental photoluminescenceChirality of nanophotonic waveguide with embedded quantum Nature
Lowloss optical waveguides made with a highloss material
2021年1月12日· Waveguides using reflective boundaries instead of TIR have been mainly investigated in the context of metalclad 25,26 or photonic crystal waveguides 27,28 However,2003年12月1日· Waveguides in photonic crystal slabs If a line defect is introduced into a photonic crystal slab lattice, the same phenomenon occurs as in the case of infinite 2D photonic crystals For an appropriate design of the waveguide some defect states are located within the band gap of the photonic crystal, so that light is confined along theSiliconbased twodimensional photonic crystal waveguides
Lithium niobate photoniccrystal electrooptic modulator
2020年8月17日· Here we report highspeed and energyefficient LN photoniccrystal EOMs, which exhibits a tiny electrooptic modal volume of only ~058 μm 3, the smallest among all highspeed LN EOMs ever2021年8月13日· The first designs of phononic crystal waveguides were naturally based on the idea of replacing the cladding by a complete bandgap crystal while keeping a homogeneous core 23–25 Straight and bent waveguides and more general circuits are inspired originally by a similar photonic crystal concept, 37,38 is exemplified in Fig 4(aPrinciples and properties of phononic crystal waveguides
Design of alloptical AND, OR, and XOR logic gates using photonic
2020年11月5日· We propose a photonic crystalbased alloptical AND, OR, and XOR logic gates using square lattice silicon rods with air background The design of proposed logic gates works on beam interference principle and operates efficiently by changing phase of light beams at 1550 nm wavelength The proposed AOX logic gates are implemented