Dynamically switchable edge-detection and bright-field imaging based on a phase-change nonlocal metasurface DOI Creative Commons

Kenan Guo,

Shuyuan Xiao, Tingting Liu

et al.

Optics Express, Journal Year: 2024, Volume and Issue: 33(2), P. 3134 - 3134

Published: Dec. 16, 2024

Optical metasurfaces offer significant advantages in enhancing the speed, efficiency, and miniaturization of imaging systems. However, most existing are limited to static functionalities lack reconfigurability, which is a key feature for practical applications dynamic environments. In this work, we demonstrate reconfigurable optical metasurface capable switching between two distinct functions (edge detection bright-field imaging) within visible spectrum. This reconfigurability achieved by tuning phase transition antimony sulfide (Sb 2 S 3 ), controls angular dependence magnetic dipole resonance. The Sb from amorphous crystalline enables different transfer functions, achieving high-performance with numerical aperture 0.42, isotropic second-order differentiation, high-resolution imaging, respectively. approach allows functional on single surface, opening up possibilities medical sensing, microscopy.

Language: Английский

Polarization-Independent Enhancement of Third-Harmonic Generation Empowered by Doubly Degenerate Quasi-Bound States in the Continuum DOI Creative Commons
Tingting Liu, Meibao Qin, Jumin Qiu

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: 25(9), P. 3646 - 3652

Published: Feb. 21, 2025

Recent advancements in nonlinear nanophotonics are driven by the exploration of sharp resonances within high-index dielectric metasurfaces. In this work, we leverage doubly degenerate quasi-bound states continuum (quasi-BICs) to demonstrate robust enhancement third-harmonic generation (THG) silicon These quasi-BICs governed C4v symmetry and therefore can be equally excited with pump light regardless polarization. By tailoring geometric parameters, effectively control Q-factors field confinement thus regulate their resonantly enhanced THG process. A maximum conversion efficiency up 1.03 × 10-5 is recorded under a intensity 5.85 GW/cm2. Polarization-independent profiles further confirmed mapping signals across polarization directions. This work establishes foundational strategies for ultracompact design high-efficiency photon upconversion systems.

Language: Английский

Citations

5
Enhanced third-harmonic generation and degenerate four-wave mixing in an all-dielectric metasurface via Brillouin zone folding induced bound states in the continuum DOI
Meibao Qin,

Feng Wu,

Tingting Liu

et al.

Physical review. B./Physical review. B, Journal Year: 2025, Volume and Issue: 111(3)

Published: Jan. 13, 2025

Bound states in the continuum (BICs) exhibit significant electric field confinement capabilities and have recently been employed to enhance nonlinear optics response at nanoscale. In this study, we achieve substantial enhancement of third-harmonic generation (THG) degenerate four-wave mixing (dFWM) by implementing Brillouin zone folding-induced BICs (BZF-BICs) an air-hole-type metasurface. By introducing gap perturbations within metasurface, guided modes below light line can be folded into cone, resulting three resonant modes: resonances, Γ-BICs, BZF-BICs. Through eigenvalue analysis multipole decompositions, establish their excitation conditions. With resonantly enhanced local field, successfully boost both THG dFWM under x y polarizations same metasurfaces. The simulated results indicate that BZF-BICs provide most third-order optical responses, with output power 10−4 W 10−2 a moderate input density 1 MW/cm2. These findings demonstrate offer effective pathway for chip-scale applications. locked icon Physics Subject Headings (PhySH)Frequency conversionNanophotonicsMetasurfacesFinite-element method

Language: Английский

Citations

2
Strong Coupling and Electromagnetically Induced Transparency in Multiple-BIC-Driven Metasurfaces DOI
Baohe Zhang,

Anlong Dong,

Junru Wang

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Photonic quasi-bound states in the continuum (quasi-BICs) provide an excellent platform for strong light-matter interactions nanophotonics. In this work, we numerically and experimentally demonstrate that Si nanorod dimer metasurface offers a new paradigm realizing multiple wavelength-stabilized quality-factor-tunable quasi-BICs, through unique symmetry breaking method does not alter volume. A pronounced electromagnetically induced transparency (EIT) effect, exhibiting group time delay of 6.7 ps, coupling accompanied by characteristic anticrossing Rabi splitting are realized based on hybridization between bright mode neighboring quasi-BIC within multiresonant metasurface. Intriguingly, sharp window, with tunable bandwidth but stable wavelength, is achieved. All numerical results validated experimental demonstration. Our findings recipe wavelength-stabilized, quasi-BICs EIT-like effect. would find utility slow light, quantum storage, nonlinear optics.

Language: Английский

Citations

2
Research Progress on Applications of Metasurface-Based Optical Image Edge Detection Technology DOI Creative Commons
Yuying Jiang,

Qingcheng Sun,

Tauseef Abbas

et al.

Photonics, Journal Year: 2025, Volume and Issue: 12(1), P. 75 - 75

Published: Jan. 16, 2025

With the rapid development of metasurface technology, metasurfaces have gained significant attention in optical edge detection. Owing to their precise control over phase, amplitude, and polarization state electromagnetic waves, offer a novel approach detection that not only overcomes size limitations traditional devices but also significantly enhances flexibility efficiency image processing. This paper reviews recent research advances for Firstly, principles phase-controlled are discussed, along with an analysis features different applications. Then, methods based on dispersion modulation elaborated, highlighting potential these technologies efficient In addition, progress multifunctional is presented, offering new perspectives application prospects future detection, discussion metasurface-based outlook development.

Language: Английский

Citations

0
Optical force modulated by the charge transfer plasmons DOI
Rui Ma, Guidong Liu, Lingling Wang

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(3)

Published: Jan. 20, 2025

We have investigated the modulation of trapping potential and force provided by graphene charge transfer plasmon (CTP) structure that supports two resonance modes. Both screened bonding dipolar mode greatly provide a strong force. The position well can be dynamically regulated modulating Fermi energy or geometry bridge, allowing for dynamic nanoparticles. restricted Brownian motion trajectory nanoparticles near indicates both modes achieve stable trapping. These peculiar could potentially open up additional possibilities optical manipulation particle sorting.

Language: Английский

Citations

0
Continuous varifocal metalens based on phase-change material DOI
Yilong Cui, Liang Hou,

Kenan Guo

et al.

Journal of Optics, Journal Year: 2025, Volume and Issue: 27(2), P. 025104 - 025104

Published: Jan. 28, 2025

Abstract Metasurfaces have provided new opportunities for the realization of flat lenses, among which tunable metalenses garnered considerable attention due to their flexible functionalities. In this paper, we present a continuously metalens based on phase-change material Sb 2 S 3 , enables precise and continuous focal length control through transition states. Under excitation linearly polarized light at 1550 nm, phase compensation is by changing crystallization state nanopillars, allowing shift between 36 µ m 48 m. At same time, maintains high focusing efficiency over 75%. This approach provides greater design flexibility broader applicability across diverse applications. By reducing reliance sources, it enhances device integration tunability, paving way in practical implementation advanced optical imaging nanophotonics.

Language: Английский

Citations

0
Merging high localization and TE-TM polarization degeneracy of guided waves in dielectric metasurfaces DOI Creative Commons
Rui Li, Sergey Polevoy, Vladimir R. Tuz

et al.

Physical Review Applied, Journal Year: 2025, Volume and Issue: 23(1)

Published: Jan. 31, 2025

The polarization degree of freedom is an inherent feature plane waves propagating in isotropic homogeneous medium. miniaturization optical systems leads to the high localization electromagnetic waves, but also loss control, namely, breaking TE-TM degeneracy. In this work, we discover near-field for highly localized guided along a dielectric metasurface. We demonstrate opportunity create metasurface with degenerate spectrum required operating wavelength and different constitutive materials. particular, analyze several possible implementations including silicon nitride ceramic metasurfaces consisting disk-shaped resonators, evaluate impact substrates. Finally, experimentally implement one designs verify its broadband spectrum. obtained results form alternative platform planar devices utilizing light. Published by American Physical Society 2025

Language: Английский

Citations

0
Ultra-sensitive hemoglobin sensing empowered by momentum-mismatch-driven quasi-bound states in the continuum DOI
Shuaiqi Huang, Cheng Zhan, Yongkui Shan

et al.

Physics Letters A, Journal Year: 2025, Volume and Issue: unknown, P. 130370 - 130370

Published: Feb. 1, 2025

Language: Английский

Citations

0
Phase-change metasurfaces for reconfigurable image processing DOI
Tingting Liu, Jumin Qiu, Tianbao Yu

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(8)

Published: Feb. 24, 2025

Optical metasurfaces have enabled high-speed, low-power image processing within a compact footprint. However, reconfigurable imaging in such flat devices remains critical challenge for fully harnessing their potential practical applications. Here, we propose and demonstrate phase-change capable of dynamically switching between edge-detection bright-field the visible spectrum. This reconfigurability is achieved through engineering angular dispersion at electric magnetic Mie-type resonances. The customized metasurface exhibits an angle-dependent transmittance profile amorphous state Sb2S3 meta-atoms efficient isotropic edge detection, angle-independent crystalline uniform imaging. nanostructured Sb2S3-based hold significant applications computer vision autonomous driving systems.

Language: Английский

Citations

0
Optical edge detection with adjustable resolution using planar liquid crystal Alvarez lens DOI
Lin Liu,

Qun Hao,

Cancan Yao

et al.

Optics Letters, Journal Year: 2025, Volume and Issue: 50(7), P. 2374 - 2374

Published: March 3, 2025

In this Letter, we propose an optical edge detection method with adjustable resolution using a planar liquid crystal Alvarez lens (LCAL). A was fabricated by laser direct writing. When the focal length of changes and linearly polarized light (LP) passes through lens, angle between emitted left-handed circularly right-handed can be controlled, enabling detection. The adjust width from 32.5 μm to 73.7 without requiring any rotation or axial displacement. Moreover, it accomplish comprehensive across broadband spectral range. This could offer potential application value for compact devices such as high-contrast microscopes smart cameras.

Language: Английский

Citations

0