- 标题
- 摘要
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- 实验方案
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Formation and Collision of Multistability-Enabled Composite Dissipative Kerr Solitons
摘要： Multistability in Kerr resonators which are driven by continuous or modulated optical waves gives rise to the superposition of distinct nonlinear states, yielding a unique platform for studying complex soliton dynamics. Here, by pumping a crystalline microresonator with two lasers that are frequency detuned from each other by one or multiple cavity free spectral ranges, we go beyond the traditional bichromatic pumping framework and enter an unexplored multistability regime that allows observing novel dynamics including composite solitons and successive soliton collisions. We generate complex frequency comb patterns, observing the velocity mismatch between the solitons and the dual-pumping-induced lattice traps and showing the synchronization of the repetition rates of constituent distinct solitons under the influence of index-barrier-induced intersoliton repulsion. We also demonstrate soliton collisions and observe transient soliton response with spectral analysis and ultrafast imaging, highlighting the eigenfrequency of dissipative soliton dynamics that coincides the “soliton (S) resonance.” Furthermore, we exploit the higher-order dispersion effect to manipulate the intrinsic group velocity mismatch between distinct solitons and demonstrate reversible switching between the composite soliton state and the soliton collisional state. Our findings bring to light the rich physics of the Kerr multistability and may equally be useful in microcomb-based spectroscopy and metrology.
关键词： Nonlinear Dynamics,Optics,Photonics
更新于2025-09-23 15:19:57
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Nonlinear Optics in Dielectric Guided-Mode Resonant Structures and Resonant Metasurfaces
摘要： Nonlinear optics is an important area of photonics research for realizing active optical functionalities such as light emission, frequency conversion, and ultrafast optical switching for applications in optical communication, material processing, precision measurements, spectroscopic sensing and label-free biological imaging. An emerging topic in nonlinear optics research is to realize high efficiency optical functionalities in ultra-small, sub-wavelength length scale structures by leveraging interesting optical resonances in surface relief metasurfaces. Such artificial surfaces can be engineered to support high quality factor resonances for enhanced nonlinear optical interaction by leveraging interesting physical mechanisms. The aim of this review article is to give an overview of the emerging field of nonlinear optics in dielectric based sub-wavelength periodic structures to realize efficient harmonic generators, wavelength mixers, optical switches etc. Dielectric metasurfaces support the realization of high quality-factor resonances with electric field concentrated either inside or in the vicinity of the dielectric media, while at the same time operate at high optical intensities without damage. The periodic dielectric structures considered here are broadly classified into guided-mode resonant structures and resonant metasurfaces. The basic physical mechanisms behind guided-mode resonances, electromagnetically-induced transparency like resonances and bound-states in continuum resonances in periodic photonic structures are discussed. Various nonlinear optical processes studied in such structures with example implementations are also reviewed. Finally, some future directions of interest in terms of realizing large-area metasurfaces, techniques for enhancing the efficiency of the nonlinear processes, heterogenous integration, and extension to non-conventional wavelength ranges in the ultra-violet and infrared region are discussed.
关键词： harmonic generation,guided-mode resonance,four-wave mixing,Mie scattering,optical resonances,nonlinear optics,sub-wavelength gratings,Fano resonances,optical switching
更新于2025-09-23 15:19:57
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Statistical Analysis of the Potential of a Bathymetric Lidar with Time-of-Flight Matrix Spad Photodetector
摘要： The Monte Carlo method is used to solve the nonstationary laser sensing equation for a multicomponent optically dense water medium taking into account the influence of the water-air interface and the contributions of multiple radiation scattering by sea water and of the signal reflection from the sea bottom. Dependences of the signal power recorded with a monostatic lidar equipped with a time-of-flight matrix single-photon avalanche diode (SPAD) photodetector on the water depth and surface microwaves for different field-of-view angles of the receiver are obtained. Results of investigations have shown that the maximum depth of sea bottom detection is 40–50 m given that the optical water thickness does not exceed 3.5–4 m. The dynamic range of lidar signals from water reaches 7–9 orders of magnitude for lidar sensing of sea bottom at limiting depths of 40–50 m in very transparent water in the presence of the Fresnel reflection from the water surface. Results of statistical simulation have shown that the lidar system with the matrix receiver intended for sea water sensing can be realized at the modern technical level. Under favorable conditions, the lidar return signal power provides sensing of sea bottom to depths of 40–50 m.
关键词： depth of sea bottom,ocean optics,lidar,multiple radiation scattering
更新于2025-09-23 15:19:57
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Enhanced Goos-H?¤nchen shift of graphene coated on one-dimensional photonic crystal
摘要： The enhancement of Goos-H?nchen shift of graphene coated on a truncated one-dimensional photonic crystal is proposed and theoretically investigated. The proposed band-gap con?guration featuring highly electric ?eld enhancement and con?nement on the graphene surface enables the excitation of Bloch surface wave mode. By taking full advantages of the remarkable optical properties of the excited optical surface wave mode, a large phase variation appears near the band-gap of the proposed structure, leading to a dramatically enhanced Goos-H?nchen shift. Leveraging this giant Goos-H?nchen shift, the sensing capability of this proposed structure is discussed, implicating a superior performance in Goos-H?nchen shift sensing applications.
关键词： Graphene,Optical instruments,Optics at surfaces,One-dimensional photonic crystal
更新于2025-09-23 15:19:57
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Concrete Crack Monitoring Using a Novel Strain Transfer Model for Distributed Fiber Optics Sensors
摘要： In this paper, we study the strain transfer mechanism between a host material and an optical fiber. A new analytical model handling imperfect bonding between layers is proposed. A general expression of the crack-induced strain transfer from fractured concrete material to optical fiber is established in the case of a multilayer system. This new strain transfer model is examined through performing wedge splitting tests on concrete specimens instrumented with embedded and surface-mounted fiber optic cables. The experimental results showed the validity of the crack-induced strain expression fitted to the distributed strains measured using an Optical Backscattering Reflectometry (OBR) system. As a result, precise estimations of the crack openings next to the optical cable location were achieved, as well as the monitoring of the optical cable response through following the strain lag parameter.
关键词： crack,distributed strains,crack opening,wedge splitting test,fiber optics sensors,strain transfer,imperfect bonding,concrete
更新于2025-09-23 15:19:57
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Single Molecule Nonlinearity in a Plasmonic Waveguide
摘要： Plasmonic waveguides offer the unique possibility to confine light far below the diffraction limit. Past room temperature experiments focused on efficient generation of single waveguide plasmons by a quantum emitter. However, only the simultaneous interaction of the emitter with multiple plasmonic fields would lead to functionality in a plasmonic circuit. Here, we demonstrate the nonlinear optical interaction of a single molecule and propagating plasmons. An individual terrylene diimide (TDI) molecule is placed in the nanogap between two single-crystalline silver nanowires. A visible wavelength pump pulse and a red-shifted depletion pulse travel along the waveguide, leading to stimulated emission depletion (STED) in the observed fluorescence. The efficiency increases by up to a factor of 50 compared to far-field excitation. Our study thus demonstrates remote nonlinear four-wave mixing at a single molecule with propagating plasmons. It paves the way toward functional quantum plasmonic circuits and improved nonlinear single-molecule spectroscopy.
关键词： quantum emitter,nonlinear optics,stimulated emission depletion STED,two-wire transmission line,single-crystalline silver flake,plasmonic nanocircuit
更新于2025-09-23 15:19:57
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Tunable hybrid spectral filter and time-division multiplexing of second-order fluorescence controlled by phonon and dressing on Pr <sup>3+</sup> :YSO
摘要： Atom-like nonlinear responses of rare earth doped crystal Pr3+:Y2SiO5 (Pr3+: YSO) exhibit unique features compared with other nonlinear crystals. The responses become more interesting, while Pr3+: YSO is modulated simultaneously by temperature and multi-parameters related to dressed state. The generations of Stokes and fluorescence (FL) signals are demonstrated in both time and spectral domains. Here, we are presenting a new controlling strategy by interaction between dressing and phonon on Pr3+: YSO to manipulate the intensity of Stokes and FL signals. Interaction between dressing and phonon leads to more stable nonlinear response of the YSO crystal, which is very important for integrated quantum photonic device stability and multi-functionality. Also, we have realized tunable hybrid spectral filter (narrow-band pass notch filter (NBPNF), narrow-band stop notch filter (NBSNF)) and time-division multiplexing router on Pr3+: YSO by controlling the interaction between dressing and phonons. Tunable hybrid spectral filter and pure NBPNF are realized from dressing dip of Autler-Townes (AT) splitting and spectral intensity Stokes emission peak. Also, time-division multiplexing router is realized by time-domain adiabatic expansion. Furthermore, optical switch between tunable hybrid spectral filter to pure NBPNF is realized from dressing dip (AT splitting) to spectral intensity Stokes emission peak. Our experimental results suggests advanced technique for realizing tunable hybrid spectral filter with a contrast of about 98%, and optical time-division multiplexing router with channel equalization is about 85%.
关键词： four wave mixing,nonlinear optics,dressing,hybrid,optical device,fluorescence and phonon,filter
更新于2025-09-23 15:19:57
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[IEEE 2019 Fifth International Conference on Image Information Processing (ICIIP) - Shimla, India (2019.11.15-2019.11.17)] 2019 Fifth International Conference on Image Information Processing (ICIIP) - NFGS Enabled Face Re-identification for Efficient Surveillance in Low Quality Video
摘要： Integrated photonics is a promising route toward high-performance next-generation ICT and sensing devices. Although fiber-packaging is perhaps the most widely discussed obstacle to low-cost photonic devices, electronic-photonic integration and thermal-stabilization are also significant design considerations that need to be properly managed. Using a state-of-the-art Si-photonic optical-network-unit as a worked example, we illustrate some key challenges and solutions in the field of photonic-packaging. Specifically, we describe a novel solder-reflow bonding process for the face-to-face three-dimensional (3-D) integration of photonic and electronic integrated circuits, discuss current and future multichannel fiber-alignment techniques, and investigate the coefficient-of-performance of the thermo-electric cooler that stabilizes the temperature of the photonic components. The challenge of photonic-packaging is to simultaneously satisfy these electrical, optical, and thermal design requirements on small-footprint devices, while establishing a route to scalable commercial implementation.
关键词： silicon photonics,Integrated optics,photonic packaging,optoelectronics
更新于2025-09-23 15:19:57
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Mie Scattering in the Macroscopic Response and the Photonic Bands of Metamaterials
摘要： Herein, a general approach for the numerical calculation of the effective dielectric tensor of metamaterials is presented, and it is shown that the formalism may be used to study metamaterials beyond the long-wavelength limit. A system composed of high-refractive-index cylindrical inclusions is considered, and it is shown that the method reproduces the Mie resonant features and photonic band structure obtained from a multiple scattering approach, hence opening the possibility to study arbitrarily complex geometries for the design of resonance-based negative refractive metamaterials at optical wavelengths.
关键词： Mie resonances,nonlocal optics,metamaterials,homogenization
更新于2025-09-23 15:19:57
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Photon-added entangled Baruta??Girardello coherent states: non-classicality and generation
摘要： In continuation of previous papers where the addition of photons into the two-mode entangled quantum states was studied, we proposed a scheme to establish and generate photon-added ‘entangled Barut–Girardello coherent states’ (PAEBGCSs), by applying photon creation operators on the two-mode EBGCSs, where the latter is introduced by Hach et al. (JOSA B 35:2433, 2018), as a new class of quantum states connected to the simple harmonic oscillator and generated through a Mach–Zehnder interferometer, and the dynamics of their entanglement is analyzed in details. In addition, the EBGCSs include strong non-classical properties; then, to gain insight into the effectiveness of photon addition to them and comparing with the case already discussed as the photon-added entangled Klauder–Perelomov coherent states, we present a general analysis of non-classical properties such as photon statistics and squeezing and photon number distribution. We also derive the concurrence measure to quantify the entanglement of these states and look for conditions that provide information on whether these become maximally entangled. We show that the photon addition plays an important role in non-classical effects, and this operation can be applied to enhance the entanglement of the PAEBGCSs. For instance, entanglement preserving against quantum polarization is occurred by adding photons to the EBGCSs. Finally, an experimental procedure for generating the PAEBGCSs in the framework of cavity quantum electrodynamics is established.
关键词： non-classicality,quantum optics,Photon-added entangled Barut–Girardello coherent states,generation,quantum information
更新于2025-09-23 15:19:57