Enhancing the light-matter interaction in two-dimensional (2D) materials with high-$Q$ resonances photonic structures has boosted development of optical and devices. Herein, we intend to build a bridge between radiation engineering bound states continuum (BIC), present general method control light absorption at critical coupling through quasi-BIC resonance. In single-mode two-port system composed graphene coupled silicon nanodisk metasurfaces, maximum 0.5 can be achieved when rate magnetic...

Tailoring optical nonlinear effects (e.g., harmonic generation, sum-frequency mixing, etc.) in the recently emerging all-dielectric platform is important for both fundamental science and industrial development of high-efficiency, ultrafast, miniaturized photonic devices. In this paper, we propose a method dynamically switchable high-harmonic generation silicon nanodimer metasurfaces by exploiting polarization-controlled dual bound states continuum (BIC). Owing to high-quality factor BIC...

Optical metasurfaces enable us to engineer the electromagnetic space and control light propagation at an unprecedented level, offering a powerful tool achieve modulation of over multiple physical dimensions. Here, we demonstrate $\mathrm{Sb}$${}_{2}$$\mathrm{S}$${}_{3}$ phase-change metasurface platform that allows active manipulation both amplitude phase. In particular, implement dynamic nanoprinting holographic image display through tuning crystallization levels this material. The...

We investigate the strong coupling between excitons and quasibound states in continuum (BICs) resonance a bulk ${\mathrm{WS}}_{2}$ metasurface. Here, we employ to construct an ultrathin nanodisk metasurface, supporting symmetry-protected magnetic dipole quasi-BIC resonance, which can self-hybridize with lead light-matter interaction enhancement within structure without necessity for external cavity. This be characterized by considerable Rabi splitting of 159 meV clearly anticrossing behavior...

Metasurface-mediated bound states in the continuum (BIC) provides a versatile platform for light manipulation at subwavelength dimension with diverging radiative quality factor and extreme optical localization. In this work, we theoretically propose magnetic dipole quasi-BIC resonance asymmetric silicon nanobar metasurfaces to realize giant Goos-Hänchen (GH) shift enhancement by more than three orders of wavelength. sharp contrast GH based on Brewster dip or transmission-type resonance,...

Strong coupling exhibits unique ability to preserve quantum sates between light and matter, which is essential for the development of information technology. To explore physical mechanism behind this phenomenon, we employ tight-binding method expanding temporal coupled-mode theory, with absorption spectrum formula coupled system directly obtained in an analytical way. It reveals all meaning parameters defined our shows how tailor lineshapes systems. Here, set example manipulate strong a...

The emerging all-dielectric platform exhibits high-quality ($Q$) resonances governed by the physics of bound states in continuum (BIC) that drives highly efficient nonlinear optical processes. Here we demonstrate robust enhancement third-(THG) and fifth-harmonic generation (FHG) from metasurfaces composed four silicon nanodisks. Through symmetry breaking, genuine BIC transforms into high-$Q$ quasi-BIC resonance with tight field confinement for record high THG efficiency $3.9\times10^{-4}$...

The grating magneto-optical trap (GMOT) is a promising approach for miniaturizing cold-atom systems. We demonstrated real-time parameter optimization and drift-mitigation method GMOT system based on Bayesian learning. In remarkable short convergence period, optimal numbers of cold atoms reached up to 7.7 × 106, which was nearly four times better than with manual optimization. parameters included not only physical but also mechanical that can control the critical optical alignment. results...

Recent progress in nanophotonics is driven by the desire to engineer light-matter interaction two-dimensional (2D) materials using high-quality resonances plasmonic and dielectric structures. Here, we demonstrate a link between radiation control at critical coupling metasurface-based bound states continuum (BIC) physics, develop generalized theory light absorption of 2D resonance metasurfaces. In typical example hybrid graphene-dielectric metasurfaces, present manipulation bandwidth more...

The liquid crystal spatial light modulator (SLM) is able to provide flexible wavefront control, whereas the initial phase and its response distortions will heavily influence modulation accuracy. currently existing calibration methods are tedious time consuming. A novel multi-region method for minimizing those proposed. entire panel divided into several local regions based on similarity of characteristic. nonlinear static distortion each region calibrated in iterative division procedure....

Formulas of partially spatial coherent light are derived and its corresponding design algorithm is proposed for generating computer-generated holograms based on light. The divided into two terms: spatially absolute part incoherent part. former propagated by angular spectrum method, while the latter optical transfer function. related formulas where function (degree coherence) related. A modified iterative further developed optimizing phase distributions. Numerical simulations experiments both...

Coherent population trapping (CPT) resonance signals have promise in a wide range of applications involving precision sensing. Generally, the CPT phenomenon occurs three-level Λ system with bichromatic phase-coherent light fields. We theoretically and experimentally studied an Rb vapor-cell-based atomic optical fields external microwave (MW) field simultaneously. In such mixing scheme, coherence ground states could be controlled either by Rabi frequency or relative phase between MW field....

High-resolution inelastic He atom scattering experiments, employing a time-of-flight (TOF) technique, have been carried out on NiO (001) in the 〈100〉 and 〈110〉 high symmetry directions. The targets were prepared by cleaving single-crystal air then baking vacuum. Nearly all of experiments reported here at target temperature 575 K, which is above Néel point (TN = 523 K), with wave vectors range 7–9 Å−1 (25–45 meV). Because these temperatures, peaks TOF spectra found to be somewhat broader...

We present a coherent population trapping clock system based on laser-cooled 87 Rb atoms. The consists of frequency-stabilized CPT interrogation laser and cooling as well compact magneto-optical trap, high-performance microwave synthesizer, signal detection system. resonance in the continuous wave regime exhibits an absorption contrast ∼ 50%. In Ramsey method, linewidth central fringe is 31.25 Hz. achieves fractional frequency stability <mml:math...

The present Rabi resonance microwave sensing technique cannot fully describe the magnetic field strength distribution due to signal detection method. Here, we propose an alternative resonance-based imaging using a digital micromirror device and alkali atomic cell. experimental results well of quantitatively agree with absorption results. This can also be used as method analyze measure relaxation rate in vapor cell offers SI-traceable approach for field. Its simple architecture holds great...

Partially temporal coherent light (PTCL) has been applied to holographic reconstruction reduce speckle noise in display systems, while the encoding methods of computer-generated hologram (CGH), based on PTCL, have not reported. We propose a novel method CGH, which PTCL with broadband continuous spectrum is used illuminate object image. The discretized into different wavelengths and weight value associated power assigned each wavelength. diffractive transmission Fresnel diffraction theory....

Pipeline infrastructure is essential to the economy of society and life quality residents. Due aging as time, corrosion, cracks, or damages induced by earth movements might occur in cast-iron pipelines, resulting a leak explosion causing potential losses lives properties. Trenchless technology such cured-in-place pipe (CIPP) structural liner an effective way rehabilitate pipelines. As affordable flexible trenchless alternative, epoxy resin widely used CIPP material for preventing leakage...