Jose Antonio Sánchez-Gil

Electrically activated quasi-BICs in metasurfaces through atomically thin semiconductors

Ramón J. Paniagua-Domínguez, Jose Antonio Sánchez-Gil

A new class of electrically tunable nanophotonic devices is presented combining atomically thin 2D materials and metasurfaces supporting quasi bound states in the continuum, with appealing potential applications.

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Engineering and enhancement of non-reciprocal effects in BIC-supporting metasurfaces

Beatriz Castillo López de Larrinzar, Jose Antonio Sánchez-Gil, Antonio García‐Martín

Abstract We theoretically demonstrate strong enhancement of non-reciprocal magneto-optical (MO) cross-polarization coupling in metasurfaces mediated by quasi-bound states in the continuum (q-BICs). We do so by utilizing n-doped InSb micropillar metasurfaces under an external magnetic field in the polar Kerr configuration. q-BIC-driven …

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Confinement of Polariton Condensates in Quasi‐Flat Band BICs in Plasmonic and Dielectric Metasurfaces

Anton Matthijs Berghuis, José Luis Pura, Rafael P. Argante, Shunsuke Murai et autres

ABSTRACT We investigate exciton–polariton condensation in square arrays, composed of either dielectric silicon (Si) or plasmonic silver (Ag) nanodisks, covered with a dye‐doped layer. Both arrays support symmetry‐protected bound states in the continuum (BICs) at normal incidence, featuring electric quadrupolar and magnetic …

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Near-field probing of the local density of optical states enhanced by bound states in the continuum in nonlocal metasurfaces

Jie Ji, Jose Antonio Sánchez-Gil, Djero B. L. Peeters, Wouter Holman et autres

Bound states in the continuum (BICs) are optical modes that remain decoupled from free-space radiation. Symmetry-protected BICs in metasurfaces offer powerful means to control light-matter interactions. A key property governing these interactions is the partial local density of optical states (PLDOS), which …

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Near-field Probing of the Local Density of Optical States Enhanced by Bound States in the Continuum in Nonlocal Metasurfaces

Jie Ji, Jose Antonio Sánchez-Gil, Djero B. L. Peeters, Wouter Holman et autres

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Robust Circularly Polarized Luminescence via Quasi-Bound States in the Continuum in Intrinsic Chiral Silicon Metasurfaces

Yu‐Chen Wei, José Luis Pura, Anton Matthijs Berghuis, Minpeng Liang et autres

High Resolution Image Download MS PowerPoint Slide We demonstrate circularly polarized photoluminescence emission, with dissymmetry factors g PL over 0.1, from achiral organic dye molecules by leveraging quasi-bound states in the continuum (quasi-BICs) and surface lattice resonances (SLRs) in intrinsic silicon chiral …

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Steering chiral luminescence with silicon metasurfaces

Yu‐Chen Wei, Minpeng Liang, Xu Zhu, José Luis Pura et autres

Circularly polarized luminescence is crucial for applications in displays, optical communication, bio-imaging, and medical diagnostics. In this work, we investigate the intrinsic and extrinsic chiro-optical properties of silicon metasurfaces. For extrinsic chiral luminescence, we employ metasurfaces with unit cells composed of dimers …

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Cloaked Quasi Bound States in the Continuum in Semiconductor Metasurfaces with Out‐of‐Plane Symmetry Breaking

Lucía Hidalgo‐Arteaga, Beatriz Castillo López de Larrinzar, Antonio García‐Martín, Diego R. Abujetas et autres

Abstract Bound states in the continuum (BICs) have attracted much attention in Nanophotonics for their (formally) infinite Q factors, quasi‐BICs (qBICs) being the symmetry‐broken version allowing for in‐ and out‐coupling at the expense of finite (but large) Q factors. Here, it is …

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Dark asymmetric modes in semiconductor metasurfaces with out-of-plane symmetry breaking: cloaked quasi bound states in the continuum

Jose Antonio Sánchez-Gil, Lucía Hidalgo‐Arteaga, Beatriz Castillo López de Larrinzar, Diego R. Abujetas et autres

Bound states in the continuum (BICs) have attracted much attention in Nanophotonics for their (formally) infinite Q factors, quasi-BICs (qBICs) being the symmetry-broken version allowing for in- and out-coupling at the expense of finite (but large) Q factors. very all-dielectric metasurfaces Here …

Dark asymmetric modes in semiconductor metasurfaces with out-of-plane symmetry breaking: cloaked quasi bound states in the continuum

Jose Antonio Sánchez-Gil, Lucía Hidalgo‐Arteaga, Beatriz Castillo López de Larrinzar, Diego R. Abujetas et autres

Bound states in the continuum (BICs) have attracted much attention in Nanophotonics for their (formally) infinite Q factors, quasi-BICs (qBICs) being the symmetry-broken version allowing for in- and out-coupling at the expense of finite (but large) Q factors. very all-dielectric metasurfaces Here …

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Long-range molecular energy transfer mediated by strong coupling to plasmonic topological edge states

Álvaro Buendía, Vincenzo Giannini, Jose Antonio Sánchez-Gil, William L. Barnes et autres

Strong coupling between light and molecular matter is currently attracting interest both in chemistry and physics, in the fast-growing field of molecular polaritonics [1] . The large near-field enhancement of the electric field of plasmonic surfaces and their high tunability make arrays …

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Organic Exciton-Polariton Condensation in Metasurfaces

Jaime Gómez Rivas, Matthijs Berghuis, José Luis Pura, Jose Antonio Sánchez-Gil

We demonstrate strong light-matter coupling of excitons in organic dyes and photons in a cavity formed by a silicon metasurface. The metasurface consists of an array of nanodisks supporting Mie-surface lattice resonances (SLRs). For sufficiently high pump fluences, exciton-polaritons condense in a …

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