Subwavelength dielectric resonators for nonlinear nanophotonics

Koshelev, Kirill; Kruk, Sergey; Melik-Gaykazyan, Elizaveta V.; Choi, Jae Hyuck; Bogdanov, Andrey; Park, Hong Gyu; Kivshar, Yuri S.

doi:10.1126/science.aaz3985

Cited by 756 publications

(653 citation statements)

References 42 publications

(28 reference statements)

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“…One may have the following question: are there any highorder multipoles in the Mie chiral particles? Recently, broad interest has emerged in the study of intriguing high-order multipoles in dielectric elements, including the multipoles and bound states in the continuum (BIC) in nanocylinders 50,51 , as well as the multipole resonance enhanced second harmonic generation (SHG) in AlGaAs (aluminium gallium arsenide) 52 . The existence of electric and magnetic modes enhances the scattering cross sections and optical forces.…”

Section: Discussionmentioning

confidence: 99%

Chirality-assisted lateral momentum transfer for bidirectional enantioselective separation

et al. 2020

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Lateral optical forces induced by linearly polarized laser beams have been predicted to deflect dipolar particles with opposite chiralities toward opposite transversal directions. These "chirality-dependent" forces can offer new possibilities for passive all-optical enantioselective sorting of chiral particles, which is essential to the nanoscience and drug industries. However, previous chiral sorting experiments focused on large particles with diameters in the geometrical-optics regime. Here, we demonstrate, for the first time, the robust sorting of Mie (size~wavelength) chiral particles with different handedness at an air-water interface using optical lateral forces induced by a single linearly polarized laser beam. The nontrivial physical interactions underlying these chirality-dependent forces distinctly differ from those predicted for dipolar or geometrical-optics particles. The lateral forces emerge from a complex interplay between the light polarization, lateral momentum enhancement, and out-of-plane light refraction at the particle-water interface. The sign of the lateral force could be reversed by changing the particle size, incident angle, and polarization of the obliquely incident light.

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Section: Discussionmentioning

confidence: 99%

Chirality-assisted lateral momentum transfer for bidirectional enantioselective separation

et al. 2020

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“…[22][23][24] Among these materials, III-V semiconductors such as GaAs or AlGaAs, due to their strong secondorder nonlinear optical susceptibility, [25][26][27] have the highest potential of application in nonlinear photonics devices. Individual III-V nanoantennas supporting electric and magnetic multipolar resonances [26,[28][29][30][31][32] have already demonstrated ultrahigh efficiency of second-harmonic generation (SHG) in subwavelength structures. [33][34][35] In addition to these advantages, semiconductor nanostructures can also be electrically doped and used for subwavelength active devices.…”

Section: Introductionmentioning

confidence: 99%

Engineering of the Second‐Harmonic Emission Directionality with III–V Semiconductor Rod Nanoantennas

Saerens

Tang

Petrov

et al. 2020

Laser & Photonics Reviews

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The ability to engineer nonlinear optical emission from nanostructures is a key challenge to create efficient and compact components for integrated devices. This paper shows a method to control and manipulate the directionality of second‐harmonic generation emission by engineering geometry and position of rod nanoantennas. Single and dimer nanoantennas are fabricated by slicing III–V semiconductor nanowires with focused ion beam milling. The nonlinear optical response of nanoantennas is tailored by adjusting their length and position to achieve a targeted phase difference. The studied GaAs nanoantennas have a wurtzite structure that allows to achieve preferable directions for the second‐harmonic emission compared to a typical bulk zinc blende structure from top‐down fabricated nanostructures. Wurtzite nanoantennas provide a pure electric dipole response at the second‐harmonic wavelength, which together with pi‐phase control of emitted light is used for designing nonlinear emission patterns. The simulation results show how to redirect the second‐harmonic beam up to 30° and how to tailor the emission profile by adding elements. This method of second‐harmonic generation manipulation and phase array engineering can be applied to different types of nanowires and nanostructures. Nonlinear beam steering with structures from nanowires will foster the creation of compact optical components for integrated circuits.

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“…Finally, the main conclusions of this review article with some future directions of interest in terms of large-area metasurfaces, techniques for enhancing the efficiency of the nonlinear processes, heterogenous integration, and extension to non-conventional wavelength ranges in the ultra-violet and infrared region are presented. There are few other detailed review articles published previously in the area of all-dielectric metasurfaces [12,13], resonant grating structures [17], and their nonlinear optical application [4,10,14,20].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Optics in Dielectric Guided-Mode Resonant Structures and Resonant Metasurfaces

et al. 2020

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Nonlinear optics is an important area of photonics research for realizing active optical functionalities such as light emission, frequency conversion, and ultrafast optical switching for applications in optical communication, material processing, precision measurements, spectroscopic sensing and label-free biological imaging. An emerging topic in nonlinear optics research is to realize high efficiency optical functionalities in ultra-small, sub-wavelength length scale structures by leveraging interesting optical resonances in surface relief metasurfaces. Such artificial surfaces can be engineered to support high quality factor resonances for enhanced nonlinear optical interaction by leveraging interesting physical mechanisms. The aim of this review article is to give an overview of the emerging field of nonlinear optics in dielectric based sub-wavelength periodic structures to realize efficient harmonic generators, wavelength mixers, optical switches etc. Dielectric metasurfaces support the realization of high quality-factor resonances with electric field concentrated either inside or in the vicinity of the dielectric media, while at the same time operate at high optical intensities without damage. The periodic dielectric structures considered here are broadly classified into guided-mode resonant structures and resonant metasurfaces. The basic physical mechanisms behind guided-mode resonances, electromagnetically-induced transparency like resonances and bound-states in continuum resonances in periodic photonic structures are discussed. Various nonlinear optical processes studied in such structures with example implementations are also reviewed. Finally, some future directions of interest in terms of realizing large-area metasurfaces, techniques for enhancing the efficiency of the nonlinear processes, heterogenous integration, and extension to non-conventional wavelength ranges in the ultra-violet and infrared region are discussed.

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Subwavelength dielectric resonators for nonlinear nanophotonics

Cited by 756 publications

References 42 publications

Chirality-assisted lateral momentum transfer for bidirectional enantioselective separation

Chirality-assisted lateral momentum transfer for bidirectional enantioselective separation

Engineering of the Second‐Harmonic Emission Directionality with III–V Semiconductor Rod Nanoantennas

Nonlinear Optics in Dielectric Guided-Mode Resonant Structures and Resonant Metasurfaces

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