Polychromatic full-polarization control in mid-infrared light

Light Science & Applications, Journal Year: 2023, Volume and Issue: 12(1)

Published: May 4, 2023

Objects with different shapes, materials and temperatures can emit distinct polarizations spectral information in mid-infrared band, which provides a unique signature the transparent window for object identification. However, crosstalk among various polarization wavelength channels prevents from accurate detections at high signal-to-noise ratio. Here, we report full-polarization metasurfaces to break inherent eigen-polarization constraint over wavelengths mid-infrared. This recipe enables select arbitrary orthogonal basis individual independently, therefore alleviating efficiency degradation. A six-channel all-silicon metasurface is specifically presented project focused light positions three wavelengths, each pair of arbitrarily chosen polarizations. An isolation ratio 117 between neighboring experimentally recorded, exhibiting detection sensitivity one order magnitude higher than existing infrared detectors. Remarkably, aspect ~30 our meta-structures manufactured by deep silicon etching technology temperature -150 °C guarantees large precise phase dispersion control broadband 3 4.5 μm. We believe results would benefit noise-immune remote sensing space-to-ground communications.

Language: Английский

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Optical bound states in the continuum in periodic structures: mechanisms, effects, and applications

Photonics Insights, Journal Year: 2024, Volume and Issue: 3(1), P. R01 - R01

Published: Jan. 1, 2024

Language: Английский

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Roadmap on photonic metasurfaces

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 124(26)

Published: June 24, 2024

Here we present a roadmap on Photonic metasurfaces. This document consists of number perspective articles different applications, challenge areas or technologies underlying photonic Each will introduce the topic, state art as well give an insight into future direction subfield.

Language: Английский

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Reaching the efficiency limit of arbitrary polarization transformation with non-orthogonal metasurfaces

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 6, 2024

Polarization transformation is at the foundation of modern applications in photonics and quantum optics. Notwithstanding their applicative interests, basic theoretical experimental efforts are still needed to exploit full potential polarization Here, we reveal that coherent superposition two non-orthogonal eigen-states Jones matrix can improve drastically efficiency arbitrary with respect classical orthogonal By exploiting metasurface stacking twisted configuration, have implemented a powerful termed "non-orthogonal metasurfaces", experimentally demonstrated input-output modulation reaching nearly 100% transmission broadband angle-insensitive manner. Additionally, proposed routing methodology project independent phase holograms quadruplex circular components. Our results outline paradigm achieve extremely efficient optics, multiplexing for communication information encryption microwave optical frequencies. The authors showcase general method engineer unity, taking advantage eigen-formalism circumvent limitation conventional

Language: Английский

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Phase-change nonlocal metasurfaces for dynamic wave-front manipulation

Physical Review Applied, Journal Year: 2024, Volume and Issue: 21(4)

Published: April 1, 2024

Recent advances in nonlocal metasurfaces have enabled unprecedented success shaping the wave front of light with spectral selectivity, offering alternative solutions for many emerging nanophotonics applications. The ability to tune both and spatial properties such a class is highly desirable, but dynamic nonvolatile control remains elusive. Here, we demonstrate active narrowband wave-front manipulation by harnessing quasi-bound states continuum (quasi-BICs) phase-change metasurfaces. proof-of-principle made ${\mathrm{Sb}}_{2}{\mathrm{S}}_{3}$ allow nonvolatile, reversible, tunable over switchable response at given wavelength near-infrared regime. design principle mainly builds upon combination geometry phase quasi-BICs tunability meta-atoms tailor resonant wavelengths. By tuning crystallization level through controlling external stimuli, wave-front-shaping functionalities beam steering, one-dimensional, two-dimensional focusing, holographic imaging are achieved exclusively wavelengths, functionally transparent off resonance. This work represents critical advance towards developing an integrated metasurface future augmented virtual reality wearables.

Language: Английский

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Nonlocal meta-lens with Huygens’ bound states in the continuum

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 2, 2024

Abstract Meta-lenses composed of artificial meta-atoms have stimulated substantial interest due to their compact and flexible wavefront shaping capabilities, outperforming bulk optical devices. The operating bandwidth is a critical factor determining the meta-lens’ performance across various wavelengths. that operate in narrowband manner relying on nonlocal effects can effectively reduce disturbance crosstalk from non-resonant wavelengths, making them well-suitable for specialized applications such as nonlinear generation augmented reality/virtual reality display. However, meta-lenses require striking balance between local phase manipulation resonance excitation, which involves trade-offs among factors like quality-factor, efficiency, dimensions, footprint. In this work, we experimentally demonstrate meta-lens featuring Huygens’ bound states continuum (BICs) its near-infrared imaging application. All-dielectric integrated-resonant unit particularly optimized efficiently induce both quasi-BIC generalized Kerker effect, while ensuring rotation-angle robustness generating geometric phase. experimental results show single-layer possesses high quality-factor 104 achieves transmission polarization conversion efficiency 55%, exceeding theoretical limit 25%. wavelength-selective two-dimensional focusing are demonstrated well. This work will pave way efficient meta-devices.

Language: Английский

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Momentum mismatch driven bound states in the continuum and ellipsometric phase singularities

Physical review. B./Physical review. B, Journal Year: 2024, Volume and Issue: 109(8)

Published: Feb. 29, 2024

In this paper, we elucidate the formation of bound states in continuum (BICs) compound grating waveguide structures from perspective momentum mismatch. As complex lattice reduces to a simple lattice, excitable guided resonance turns into an unexcitable BIC due Herein, refer state as mismatch driven BIC. Interestingly, incidence changes normal oblique, single splits dual BICs nonzero tangential incident light. Distinct conventional symmetry-protected and accidental BICs, lie sections photonic bands. Consequently, factors quasi-BICs exhibit angular robustness far beyond quasi-BICs. Empowered by BIC, pair ellipsometric phase singularities emerge. Enabled drastic change, ultrasensitive refractive index sensing can be achieved. These results not only provide unique insights relation between momentum, phase, but also offer recipe for developing high-performance phase-based optical devices, such sensors, wave plates, spatial light modulators. Published American Physical Society 2024

Language: Английский

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Spatio-temporal coupled mode theory for nonlocal metasurfaces

Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)

Published: Jan. 24, 2024

Diffractive nonlocal metasurfaces have recently opened a broad range of exciting developments in nanophotonics research and applications, leveraging spatially extended-yet locally patterned-resonant modes to control light with new degrees freedom. While conventional grating responses are elegantly captured by temporal coupled mode theory, current approaches not well equipped capture the arbitrary spatial response observed nascent field metasurfaces. Here, we introduce spatio-temporal theory (STCMT), capable capturing key features resonant wavefront-shaping This framework can quantitatively guide metasurface design while maintaining compatibility local frameworks, making it powerful tool rationally optimize class ultrathin optical components. We validate this STCMT against full-wave simulations various metasurfaces, demonstrating that offers semi-analytical understand model physics functionality these devices, without need for computationally intense simulations. also discuss how may shed physical insights into phenomena photonics resulting devices. As relevant example, showcase STCMT's flexibility applying study rapidly prototype shape thermal emission.

Language: Английский

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Nonlocal metasurface for dark-field edge emission

Science Advances, Journal Year: 2024, Volume and Issue: 10(16)

Published: April 17, 2024

Nonlocal effects originating from interactions between neighboring meta-atoms introduce additional degrees of freedom for peculiar characteristics metadevices, such as enhancement, selectivity, and spatial modulation. However, they are generally difficult to manipulate because the collective responses multiple meta-atoms. Here, we experimentally demonstrate nonlocal metasurface realize modulation dark-field emission. Plasmonic asymmetric split rings (ASRs) designed simultaneously excite local dipole resonance quasi-bound states in continuum spatially extended modes. With one type unit, tailored by varying array periods. ASRs at metasurface’s edge lack sufficient interactions, resulting stronger scattering thus emission properties metasurface. Pixel-level control is demonstrated simply erasing some units, providing more flexibility than conventional metasurfaces. This work paves way manipulating facilitates applications optical trapping sorting nanoscale.

Language: Английский

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The Road to Commercializing Optical Metasurfaces: Current Challenges and Future Directions

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

Published: Jan. 15, 2025

Optical metasurfaces, components composed of artificial nanostructures, are recognized for pushing boundaries wavefront manipulation while maintaining a lightweight, compact design that surpasses conventional optics. Such advantages align with the current trends in optical systems, which demand communication devices and immersive holographic projectors, driving significant investment from industry. Although interest commercialization metasurfaces has steadily grown since initial breakthrough diffraction-limited focusing, their practical applications have remained limited by challenges such as, massive-production yield, absence standardized evaluation methods, constrained methodology. Here, this Perspective addresses particularly focused on mass production, fabrication tolerance, performance evaluation, integration into commercial systems. Additionally, we select fields where may soon play roles provide perspective potentials. By addressing exploring solutions, aims to foster discussions will accelerate utilization further build near-future metaphotonics platforms.

Language: Английский

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