A5027067212- Advanced Fiber Laser Technologies
- Nonlinear Photonic Systems
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Metamaterials and Metasurfaces Applications
- Laser-Matter Interactions and Applications
- Plasmonic and Surface Plasmon Research
- Nonlinear Waves and Solitons
- Mechanical and Optical Resonators
- Quantum Information and Cryptography
- Neural Networks and Reservoir Computing
- Optical Network Technologies
- Orbital Angular Momentum in Optics
- Photorefractive and Nonlinear Optics
- Quantum Mechanics and Non-Hermitian Physics
- Photonic Crystal and Fiber Optics
- Quantum optics and atomic interactions
- Advanced Antenna and Metasurface Technologies
- Nonlinear Dynamics and Pattern Formation
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Optic Sensors
- Random lasers and scattering media
- Antenna Design and Analysis
- Quantum Computing Algorithms and Architecture
- Advanced Photonic Communication Systems
Australian National University
2016-2025
ARC Centre of Excellence for Transformative Meta-Optical Systems
2020-2025
Australian Research Council
2024
ACT Government
2023
Tomsk State University of Control Systems and Radio-Electronics
2020
University of Technology Sydney
2019
National Natural Science Foundation of China
2019
Nonlinear Control Strategies (United States)
2018
Max Planck Institute for the Science of Light
2016-2017
Centre for Ultrahigh Bandwidth Devices for Optical Systems
2007-2016
We study linear guided waves propagating in a slab waveguide made up of negative-refractive-index material, the so-called left-handed waveguide. reveal that waveguides possess number peculiar properties such as absence fundamental modes, mode double degeneracy, and sign-varying energy flux. In particular, we predict with dipole-vortex structure their Poynting vector.
Metasurfaces based on resonant nanophotonic structures have enabled innovative types of flat-optics devices that often outperform the capabilities bulk components, yet these advances remain largely unexplored for quantum applications. We show nonclassical multiphoton interferences can be achieved at subwavelength scale in all-dielectric metasurfaces. simultaneously image multiple projections states with a single metasurface, enabling robust reconstruction amplitude, phase, coherence, and...
We study spatial and temporal solitons in the $\mathcal{PT}$ symmetric coupler with gain one waveguide loss other. Stability properties of high- low-frequency are found to be completely determined by a single combination soliton's amplitude gain-loss coefficient waveguides. The unstable perturbations high-frequency soliton break symmetry between its active lossy components which results blowup or formation long-lived breather state. separate two space, thereby blocking power drainage...
Abstract One of the challenges modern photonics is to develop all‐optical devices enabling increased speed and energy efficiency for transmitting processing information on an optical chip. It believed that recently suggested Parity‐Time (PT) symmetric photonic systems with alternating regions gain loss can bring novel functionalities. In such systems, losses are as important and, depending structural parameters, compensates losses. Generally, PT demonstrate nontrivial non‐conservative wave...
We describe theoretically and observe experimentally the formation of a surface state in semi-infnite waveguide array with side-coupled waveguide, designed to simultaneously achieve Fano Fabry-Perot resonances. demonstrate that mode is compact, all energy concentrated few waveguides at edge no field penetration beyond position. Furthermore, we show by broadening spectral band rest it possible suppress exponentially localized modes, whereas having eigenvalue embedded continuum preserved.
Metasurfaces consisting of nanoscale structures are underpinning new physical principles for the creation and shaping quantum states light. Multiphoton that entangled in spatial or angular domains an essential resource many applications; however, their production traditionally relies on bulky nonlinear crystals. We predict demonstrate experimentally generation spatially photon pairs through spontaneous parametric down-conversion from a metasurface incorporating thin film lithium niobate...
Quantum light sources are essential building blocks for many quantum technologies, enabling secure communication, powerful computing, precise sensing and imaging. Recent advancements have witnessed a significant shift towards the utilization of ``flat" optics with thickness at subwavelength scales development sources. This approach offers notable advantages over conventional bulky counterparts, including compactness, scalability, improved efficiency, along added functionalities. review...
We study both linear and nonlinear surface waves localized at the interface separating a left-handed (LH) medium (i.e., with negative dielectric permittivity magnetic permeability) conventional [or right-handed (RH)] medium. demonstrate that can support TE- TM-polarized waves-surface polaritons, we their properties. describe intensity-dependent properties of in three different cases, i.e., when LH RH media are either is nonlinear. In case nonlinear, find two types waves, one maximum...
We report on the first experimental observation of photonic Bloch oscillations and Zener tunneling in two-dimensional periodic systems. study propagation an optical beam a square lattice superimposed refractive index ramp. observe inside Brilloin zone light from to higher-order bands band gap spectrum.
We overview theoretical and experimental results on spatial optical solitons excited in arrays of nonlinear waveguides. First, we briefly summarize the basic properties discrete Schrodinger (NLS) equation frequently employed to study spatially localized modes arrays, so-called solitons. Then, introduce an improved analytical model that describes a periodic structure thin-film waveguides embedded into otherwise linear dielectric medium. Such waveguide goes beyond NLS allows studying many new...
We reveal a generic connection between the effect of time reversals and nonlinear wave dynamics in systems with parity-time ($\mathcal{PT}$) symmetry, considering symmetric optical coupler balanced gain loss where these effects can be directly observed experimentally. show that for intensities below threshold level, amplitudes oscillate waveguides, are exactly compensated after each period due to periodic reversals. For above nonlinearity suppresses reversals, leading symmetry breaking sharp...
We introduce a novel class of spatially localized self-trapped ringlike singular optical beams in nonlinear media, the so-called azimuthons, which appear due to continuous azimuthal deformation vortex solitons. demonstrate that azimuthons are characterized by two independent integer indices, topological charge m and number N intensity peaks along ring. Each soliton family includes with negative, positive, zero angular velocity.
We study nonlinear binary arrays composed of parity-time-symmetric optical waveguides with gain and loss. demonstrate that such lattices support stable discrete solitons, which can be adiabatically tuned switched through symmetry breaking by varying loss parameters.
Optical nanoantennas have shown a great capacity for efficient extraction of photons from the near to far-field, enabling directional emission nanoscale single-photon sources. However, their potential generation and multi-photon quantum states remains unexplored. Here we demonstrate experimentally two-photon at telecommunication wavelengths based on spontaneous parametric down-conversion in an optical nanoantenna. The antenna is crystalline AlGaAs nanocylinder, possessing Mie-type resonances...
We show that the parity-time (PT) symmetric coupled optical waveguides with gain and loss support localised oscillatory structures similar to breathers of classical $\phi^4$ model. The power carried by PT-breather oscillates periodically, switching back forth between waveguides, so are compensated on average. found coexist solitons be prevalent in products soliton collisions. demonstrate evolution small-amplitude breather's envelope is governed a system two nonlinear Schr\"odinger equations,...
Photonic systems such as arrays of coupled waveguides are well suited to emulating quantum mechanics with periodic lattice potentials, allowing the investigation many physical phenomena in a convenient experimental setting.Usually, photons will "hop" only between neighboring sites at rate given by purely real coupling coefficient, thus limiting rich physics enabled long-range complex coefficients.Here we suggest and experimentally realize spectral photonic that can be configured wide variety...
We develop a general theoretical framework of integrated paired photon-plasmon generation through spontaneous wave mixing in nonlinear plasmonic and metamaterial nanostructures, rigorously accounting for material dispersion losses the quantum regime electromagnetic Green function. identify correlations layered metal-dielectric structures with 70% internal heralding efficiency reveal novel mechanism broadband enhancement due to topological transition hyperbolic metamaterials.
We predict theoretically a regime of photon-pair generation driven by the interplay multiple bound states in continuum resonances nonlinear metasurfaces. This nondegenerate is derived from hyperbolic topology transverse phase matching and can enable orders-of-magnitude enhancement photon rate spectral brightness, as compared to degenerate regime. show through comprehensive simulations that entanglement pairs be tuned varying pump polarization, which underpin future advances applications...
Complex polarization states of photon pairs are indispensable in various quantum technologies. Conventional methods for preparing desired two-photon realized through bulky nonlinear crystals, which can restrict the versatility and tunability generated due to fixed crystal susceptibility. Here we present a solution using metasurface incorporating multiplexed silica metagratings on lithium niobate film 300 nm thickness. We fabricate two orthogonal single substrate with an identical resonant...
The ability to detect and image short-wave infrared light has important applications in surveillance, autonomous navigation, biological imaging. However, the current imaging technologies often pose challenges due large footprint, thermal noise inability augment visible Here, is demonstrated by nonlinear up-conversion an ultra-compact, high-quality-factor lithium niobate resonant metasurface. Images with high conversion efficiency resolution quality are obtained despite strong nonlocality of...
We analyze the existence, stability, and internal modes of gap solitons in nonlinear periodic systems described by Schr\"odinger equation with a sinusoidal potential, such as photonic crystals, waveguide arrays, optically-induced lattices, Bose-Einstein condensates loaded onto an optical lattice. study bifurcations from band edges Floquet-Bloch spectrum, show that can appear near all lower or upper for focusing defocusing nonlinearity, respectively. that, general, two types bifurcate each...