Translationally invariant metamirrors for spatial filtering of light beams

Wang, P. Y.; Herrero, R.; Botey, Muriel; Cheng, Yu‐Chieh; Staliūnas, Kęstutis

doi:10.1103/physreva.102.013517

Cited by 5 publications

(2 citation statements)

References 23 publications

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Section: Fano-structurementioning

confidence: 99%

“…The idea of spatial filtering in reflection has been suggested in 23 and experimentally demonstrated; 24 however the angular sensitivity was relatively weak. The 23,24 studies rely on the Photonic Crystal (PhC) positioned in front of the plane mirror, while PhC itself was fabricated by direct laser writing lithography in a glass media. An advance in efficiency was achieved recently in, 25 where the Fano-like resonances in nanostructured thin films enabled a strong reflection sensitivity to the angle of incidence (AOI).…”

Section: Fano-structurementioning

confidence: 99%

See 1 more Smart Citation

Fano-structure as output coupling mirror of microchip laser doubles its brightness

Plukys,

Gailevicius,

Grineviciute

et al. 2024

Semiconductor Lasers and Laser Dynamics XI

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The compactization of lasers is an ongoing challenge in increasing their effectiveness and integrability of other systems, from nanosatellites to medical devices. The need to decrease their dimensions, especially, for diodepumped solid-state microchip laser systems causes significant problems with beam quality. Such lasers feature an additional problem of Brightness to output power scaling power. We report an approach where we used a thin film dielectric Fano-like resonance structure as a replacement to a conventional output coupler to overcome this challenge. The structure is engineered to function as a flat spatial filter element for selecting the fundamental transverse mode of the cavity. We achieved an increase of 2x over a conventional setup in CW operation. The data matches well with the numerical analysis performed for a single longitudinal mode model. We predict that this discovery could lead to advanced power scaling in submillimeter cavities, while maintaining the beam quality.

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Section: Fano-structurementioning

confidence: 99%

Section: Fano-structurementioning

confidence: 99%

Fano-structure as output coupling mirror of microchip laser doubles its brightness

Plukys,

Gailevicius,

Grineviciute

et al. 2024

Semiconductor Lasers and Laser Dynamics XI

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Multifunctional blazed gratings for multiband spatial filtering, retroreflection, splitting, and demultiplexing based on C2 symmetric photonic crystals

Serebryannikov

Skigin

Vandenbosch

et al. 2022

Journal of Applied Physics

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The concept of multifunctional reflection-mode gratings that are based on rod-type photonic crystals (PhCs) with [Formula: see text] symmetry is introduced. The specific modal properties lead to the vanishing dependence of the first-negative-order maximum on the angle of incidence and the nearly sinusoidal redistribution of the incident-wave energy between zero order (specular reflection) and first negative diffraction order (deflection) at frequency variation. These features are key enablers of diverse functionalities and the merging of different functionalities into one structure. The elementary functionalities, of which multifunctional scenarios can be designed, include but are not restricted to multiband spatial filtering, multiband splitting, retroreflection, and demultiplexing. The proposed structures are capable of multifunctional operation in the case of a single polychromatic incident wave or multiple mono-/polychromatic waves incident at different angles. The generalized demultiplexing is possible in the case of several polychromatic waves. The aforementioned deflection properties yield merging demultiplexing with splitting in one functionality. In turn, it may contribute to more complex multifunctional scenarios. Finally, the proposed PhC gratings are studied in transmissive configuration, in which they show some unusual properties.

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Wide-angle and simultaneously wideband blazing (deflection) enabling multifunctionality in metagratings comprising epsilon-near-zero materials

et al. 2023

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This paper investigates diffractions by gratings made of a dispersive material in an epsilon-near-zero (ENZ) regime and having one-side corrugations, and those by two-component dielectric-ENZ gratings with the inner corrugations and flat outer interfaces. The goal is to achieve wideband and simultaneously wide-angle −1st order blazing (deflection) that may enable wideband spatial filtering and demultiplexing in reflection mode. Several typical scenarios are discussed, which differ in the maximum magnitude of the blazed wave and size of the blazing area observed on the frequency-incidence angle plane, as well as the contribution of the ranges of positive and negative permittivity in the vicinity of zero. The high capability of ENZ and dielectric-ENZ gratings in asymmetric reflection is demonstrated for three different levels of losses for the dispersive material.

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Translationally invariant metamirrors for spatial filtering of light beams

Cited by 5 publications

References 23 publications

Fano-structure as output coupling mirror of microchip laser doubles its brightness

Fano-structure as output coupling mirror of microchip laser doubles its brightness

Multifunctional blazed gratings for multiband spatial filtering, retroreflection, splitting, and demultiplexing based on C2 symmetric photonic crystals

Wide-angle and simultaneously wideband blazing (deflection) enabling multifunctionality in metagratings comprising epsilon-near-zero materials

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