Switchable invisibility of dielectric resonators

Rybin, Mikhail V.; Samusev, K. B.; Kapitanova, Polina; Filonov, Dmitry; Belov, Pavel A.; Kivshar, Yuri S.; Лимонов, М. Ф.

doi:10.1103/physrevb.95.165119

Cited by 23 publications

(11 citation statements)

References 36 publications

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“…[33]. The conditions for negligible MD and EQ are determined by sweeping the geometrical aspect ratio, which is the ratio of the height, H, to the edge length of the square nanoplate, L. The aspect ratio is varied from 0.04 to 0.4, where the Mie-like mode is the scope of this study rather than Fabry-Pérot-like modes within the metasurface [35][36][37]. The dependence of amplitudes of multipolar modes on the height of the nanoplate or aspect ratio can be found in Supplemental Material Fig.…”

Section: Metasurface Invisibility For Light At Normal Incidencementioning

confidence: 99%

Wide-Angle Invisible Dielectric Metasurface Driven by Transverse Kerker Scattering

Zhang,

Bradley

2021

Preprint

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Interference is the cornerstone of Huygens source design for reshaping and controlling scattering patterns. The conventional underpinning principle, such as for the Kerker effect, is the interference of electric and magnetic dipole and quadrupole modes. Here a route to realize transverse Kerker scattering through employing only the interference between the electric dipole and magnetic quadrupole is demonstrated. The proposed approach is numerically validated in an ultra-thin Silicon square nanoplate metasurface, and is further verified by multipole decomposition. The metasurface is shown to be invisible for near-infrared wavelengths and with an enhanced electric field in the region of the nanoparticle. Additionally, we develop further the proposed approach with practical implementation for invisibility applications by exploring the effects of the aspect ratio of the square plate nanoresonator, the inter-particle separation, and the presence of a substrate. Further it is demonstrated that invisibility can be observed at oblique incidence up to 60 • for a transverse magnetic plane wave. The results are relevant for Huygens metasurface design for perfect reflectors, invisibility and devices for harmonic generation manipulation.

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Section: Metasurface Invisibility For Light At Normal Incidencementioning

confidence: 99%

Wide-Angle Invisible Dielectric Metasurface Driven by Transverse Kerker Scattering

Zhang,

Bradley

2021

Preprint

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“…Conventional descriptions of the dissipation processes in the DCE are input-output theories [24,25] and a quantum master equation methods [17,26,27]. Since these theories are mostly based on the Markov approximation assuming an infinite bandwidth of the free radiation field, they are insufficient to describe the DCE photon emission to a narrow-bandwidth photonic crystal with a bandgap [28][29][30][31][32]. Recent advances in hybrid quantum systems, such as optomechanical systems where a photon emission process is manipulated at a single photon level, require a theory of DCE taking into account a microscopic dissipation mechanism [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

The Dynamical Casimir Effect in a Dissipative Optomechanical Cavity Interacting with Photonic Crystal

Tanaka

Kanki

2020

Physics

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We theoretically study the dynamical Casimir effect (DCE), i.e., parametric amplification of a quantum vacuum, in an optomechanical cavity interacting with a photonic crystal, which is considered to be an ideal system to study the microscopic dissipation effect on the DCE. Starting from a total Hamiltonian including the photonic band system as well as the optomechanical cavity, we have derived an effective Floquet-Liouvillian by applying the Floquet method and Brillouin-Wigner-Feshbach projection method. The microscopic dissipation effect is rigorously taken into account in terms of the energy-dependent self-energy. The obtained effective Floquet-Liouvillian exhibits the two competing instabilities, i.e., parametric and resonance instabilities, which determine the stationary mode as a result of the balance between them in the dissipative DCE. Solving the complex eigenvalue problem of the Floquet-Liouvillian, we have determined the stationary mode with vanishing values of the imaginary parts of the eigenvalues. We find a new non-local multimode DCE represented by a multimode Bogoliubov transformation of the cavity mode and the photon band. We show the practical advantage for the observation of DCE in that we can largely reduce the pump frequency when the cavity system is embedded in a narrow band photonic crystal with a bandgap.

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“…Such properties make them particularly interesting in Photonics [2][3][4][5][6], for their diverging Q-factors without the need of complex fine optical cavities, thus leading to a rich phenomenology being explored these days such as lasing [7,8], enhanced non-linearities [9] and photoluminescence [10], sensing [11], and spin-directive coupling [12]. Interestingly, upon slightly perturbing the parameter that governs the BIC condition, high-Q resonances are observed, termed in turn quasi-BICs [13][14][15], which, if interacting with another broad resonance, may as well induce Fano resonances with extremely narrow, asymmetric line shapes [5,[15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

High-Q transparency band in all-dielectric metasurfaces induced by a quasi bound state in the continuum

Abujetas,

Barreda,

Moreno

et al. 2020

Preprint

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Bound states in the continuum (BICs) emerge throughout Physics as leaky/resonant modes that remain however highly localized. They have attracted much attention in Optics and Photonics, and especially in metasurfaces, i.e. planar arrays of sub-wavelength meta-atoms. One of their most outstanding feature is the arbitrarily large Q-factors they induce upon approaching the BIC condition, which we exploit here to achieve a narrow transparency band. We first show how to shift a canonical BIC in an all-dielectric metasurface, consisting of high-refractive disks exhibiting in-and out-of-plane magnetic dipole (MD) resonances, by tuning the periodicity of the array. By means of our coupled electric/magnetic dipole formulation, we show analytically that when the quasi-BIC overlaps with the broad (in-plane MD) resonance, a full transparency band emerges with diverging Q-factor upon approaching the BIC condition in parameter space. Finally, our experimental measurements in the microwave regime with a large array of high-refractive-index disks confirm the theoretical predictions. Our results reveal a simple mechanism to engineer an ultranarrow BIC-induced transparency band that could be exploited throughout the electromagnetic spectrum with obvious applications in filtering and sensing.

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Switchable invisibility of dielectric resonators

Cited by 23 publications

References 36 publications

Wide-Angle Invisible Dielectric Metasurface Driven by Transverse Kerker Scattering

Wide-Angle Invisible Dielectric Metasurface Driven by Transverse Kerker Scattering

The Dynamical Casimir Effect in a Dissipative Optomechanical Cavity Interacting with Photonic Crystal

High-Q transparency band in all-dielectric metasurfaces induced by a quasi bound state in the continuum

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