High-Harmonic Generation in Dielectric Metasurfaces Empowered by Bound States in the Continuum

Zograf, George; Zalogina, Anastasia; Koshelev, Kirill; Choi, Duk‐Yong; Королев, В. Н.; Hollinger, Richard; Kartashov, Daniil; Zürch, Michael; Spielmann, Christian; Makarov, Sergey; Luther‐Davies, Barry; Kruk, Sergey; Kivshar, Yuri S.

doi:10.1364/cleo_qels.2020.fth1c.5

Cited by 14 publications

(14 citation statements)

References 37 publications

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“…[ 81 ] Recently, this has also been experimentally explored where optical harmonics up to the 11 th order have been observed from metasurfaces operating around the BIC. [ 82 ] This is an exciting area of application for BICs where the strong light–matter interaction could lead to new techniques for solid‐state attosecond spectroscopy and novel extreme UV sources.…”

Section: Applications Of Bics In Photonicsmentioning

confidence: 99%

Photonic Bound States in the Continuum: From Basics to Applications

Azzam

Kildishev

2020

Advanced Optical Materials

334

141

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In theory, BICs are dark states with infinite radiative lifetime and generally require at least one dimension of the structure extending to infinity. [6] Similar conditions can also be obtained in localized systems of finite extent when the permittivity approaches zero. [5,11] However, in practice, due to the finite extent of structures, material absorption, and other external perturbations, BICs collapse to a Fano resonance with a limited radiative Q factor. Such resonances are known as quasi-BIC and they have been used to obtain very high Q resonances in numerous photonic systems to date. [6,8,12] Even though practical implementations of BICs are limited to quasi-BIC, in the literature, as well as in this review, quasi-BIC are commonly referred to as BICs. Another type of high-Q resonances called near-BIC is obtained in the vicinity of the BIC through detuning the system from the BIC regime. [9,13,14] Near-BICs can be explained by the Theory of Resonance Reactions by Fonda [13,14] as a bound state can exist in the continuum at an energy where some channels are open even when the open and closed channels are strongly coupled. If the Hamiltonian of the system differs slightly from the one that can produce such a bound state, a sharp resonance appears in all scattering and reaction cross-sections. Near-BIC resonances can be obtained over an interval of values of a specific parameter of the system, unlike BICs that are generally achieved at a single value of the parameter. [9,15] This is of importance for practical systems as it provides stability to fabrication errors and other imperfections. [12] It is also worth mentioning that the total Q factor (Q t) realizable through BICs is generally limited by the material loss. While the radiative Q-factor (Q r) at BICs can diverge, the non-radiative Q-factor (Q nr) is limited by material absorption and its inhomogeneous broadening, scattering from the structural disorder, and in-plane lateral leakage. It is therefore, important to have an accurate distinction between Q r and Q nr and account for non-radiative processes as generally the main contributors to the total Q." 1.2. BIC Types and Formation Mechanisms Since the time of initial prediction of BICs in photonics, they have been realized in numerous geometrical systems, including gratings, waveguides, metasurfaces, and photonic crystals. [4,7,9,16-24] Such a broad diversity of photonic systems supports different types of BICs that originate from various physical mechanisms. We will briefly highlight the different The introduction of bound states in the continuum (BICs) to photonics has revolutionized the way cavity design and light-matter interactions are thought about in general. BICs can have very high quality factors, even in open structures where access to radiation is permissible. Now, BICs found applications in a large class of areas, including nonlinear enhancement, coherent light generation, sensors, filters, integrated circuits, and many others. In this review, the different types of BICs in photonic systems,...

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Section: Applications Of Bics In Photonicsmentioning

confidence: 99%

Photonic Bound States in the Continuum: From Basics to Applications

Azzam

Kildishev

2020

Advanced Optical Materials

334

141

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“…19f). Recently, multiwavelength and multistep BIC enhanced processes were discussed [377], and high frequency conversion up to 11th harmonic in the UV range was proposed with femtosecond excitation [378].…”

Section: Enhanced Light-matter Interaction With Bicsmentioning

confidence: 99%

Frontiers of light manipulation in natural, metallic, and dielectric nanostructures

et al. 2021

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The ability to control light at the nanoscale is at the basis of contemporary photonics and plasmonics. In particular, properly engineered periodic nanostructures not only allow the inhibition of propagation of light at specific spectral ranges or its confinement in nanocavities or waveguides, but make also possible field enhancement effects in vibrational, Raman, infrared and fluorescence spectroscopies, paving the way to the development of novel high-performance optical sensors. All these devices find an impressive analogy in nearly-periodic photonic nanostructures present in several plants, animals and algae, which can represent a source of inspiration in the development and optimization of new artificial nano-optical systems. Here we present the main properties and applications of cutting-edge nanostructures starting from several examples of natural photonic architectures, up to the most recent technologies based on metallic and dielectric metasurfaces.

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“…The rapidly developing all-dielectric nanophotonics [1,2,3] brings new functionalities to nanoscale devices and systems for nonlinear generation [4,5,6,7,8], polarization control [9,10], sensing [11,12], lasing [13,14], and imaging [15].…”

Section: Introductionmentioning

confidence: 99%

Multipole Born series approach to light scattering by Mie-resonant nanoparticle structures

Ustimenko,

Kornovan,

Baryshnikova

et al. 2021

Preprint

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Exciting optical effects such as polarization control, imaging, and holography were demonstrated at the nanoscale using the complex and irregular structures of nanoparticles with the multipole Mie-resonances in the optical range. The optical response of such particles can be simulated either by full wave numerical simulations or by the widely used analytical coupled multipole method (CMM), however, an analytical solution in the framework of CMM can be obtained only in a limited number of cases. In this paper, a modification of the CMM in the framework of the Born series and its applicability for simulation of light scattering by finite nanosphere structures, maintaining both dipole and quadrupole resonances, are investigated. The Born approximation simplifies an analytical consideration of various systems and helps shed light on physical processes ongoing in that systems. Using Mie theory and Green's functions approach, we analytically formulate the rigorous coupled dipole-quadrupole equations and their solution in the different-order Born approximations. We analyze in detail the resonant scattering by dielectric nanosphere structures such as dimer and ring to obtain the convergence conditions of the Born series and investigate how the physical characteristics such as absorption in particles, type of multipole resonance, and geometry of ensemble influence the convergence of Born series and its accuracy.

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High-Harmonic Generation in Dielectric Metasurfaces Empowered by Bound States in the Continuum

Abstract: We demonstrate nonlinear silicon metasurfaces empowered by collective localized modes governed by bound states in the continuum operating in mid-infrared spectral range. When being resonantly excited, the metasurfaces generate 3rd to 11th odd optical harmonics.

Cited by 14 publications

References 37 publications

Photonic Bound States in the Continuum: From Basics to Applications

Photonic Bound States in the Continuum: From Basics to Applications

Frontiers of light manipulation in natural, metallic, and dielectric nanostructures

Multipole Born series approach to light scattering by Mie-resonant nanoparticle structures

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