Individual nanoantennas empowered by bound states in the continuum for nonlinear photonics

Abstract

Bound states in the continuum (BICs) represent localized modes with energies embedded in the continuous spectrum of radiating waves. BICs were discovered initially as a mathematical curiosity in quantum mechanics, and more recently were employed in photonics. Pure mathematical bound states have infinitely-large quality factors (Q factors) and zero resonant linewidth. In optics, BICs are physically limited by a finite size, material absorption, structural disorder, and surface scattering, and they manifest themselves as the resonant states with large Q factors, also known as supercavity modes or quasi-BICs. Optical BIC resonances have been demonstrated only in extended 2D and 1D systems and have been employed for distinct applications including lasing and sensing. Optical quasi-BIC modes in individual nanoresonators have been discovered recently but they were never observed in experiment. Here, we demonstrate experimentally an isolated subwavelength nanoresonator hosting a quasi-BIC resonance. We fabricate the resonator from AlGaAs material on an engineered substrate, and couple to the quasi-BIC mode using structured light. We employ the resonator as a nonlinear nanoantenna and demonstrate record-high efficiency of second-harmonic generation. Our study brings a novel platform to resonant subwavelength photonics.

References in corpus (12)

• Dielectric Metasurfaces for Complete Control of Phase and Polarization with Subwavelength Spatial Resolution and High Transmission
• Resonantly Trapped Bound State in the Continuum Laser
• High-Q supercavity modes in subwavelength dielectric resonators
• Mode-matching in multiresonant plasmonic nanoantennas for enhanced second harmonic generation
• Giant nonlinear response at the nanoscale driven by bound states in the continuum
• Bound states in the continuum and Fano resonances in the strong mode coupling regime
• Electromagnetic multipole theory for optical nanomaterials
• Formation of long-lived, scarlike modes near avoided resonance crossings in optical microcavities
• Monolithic AlGaAs second-harmonic nanoantennas
• Resonant state expansion applied to three-dimensional open optical systems
• Quasinormal-mode expansion of the scattering matrix
• Resonant state expansion applied to two-dimensional open optical systems

Cited by in corpus (138)

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• Optical manipulation with metamaterial structures
• Polarization-controlled dynamically switchable high-harmonic generation from all-dielectric metasurfaces governed by dual bound states in the continuum
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• Minireview on Disordered Optical Metasurfaces
• Sound Trapping in an Open Resonator
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• Observation of miniaturized bound states in the continuum with ultra-high quality factors
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• Asymmetric parametric generation of images with nonlinear dielectric metasurfaces
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• Bound States in the Continuum in Compact Acoustic Resonators
• Enhanced generation of non-degenerate photon-pairs in nonlinear metasurfaces
• Topological Polarization Singularities in Metaphotonics
• All-dielectric thermonanophotonics
• Observation of supercavity modes in subwavelength dielectric resonators
• High-efficiency optical frequency mixing in an all-dielectric metasurface enabled by multiple bound states in the continuum
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• Topological metasurface: From passive toward active and beyond
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• Multipolar second-harmonic generation from high-$Q$ quasi-BIC states in nanoresonators
• Quasinormal-mode modeling and design in nonlinear nano-optics
• Post-2000 Nonlinear Optical Materials and Measurements: Data Tables and Best Practices
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• Multipolar engineering of subwavelength dielectric particles for scattering enhancement
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• On-demand Plasmon Nanoparticle-Embedded Laser-Induced Periodic Surface Structures (LIPSSs) on Silicon for Optical Nanosensing
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• Directional emission of down-converted photons from a dielectric nano-resonator
• Tuning nonlinear second-harmonic generation in AlGaAs nanoantennas via chalcogenide phase change material
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• Nonlocal response of Mie-resonant dielectric particles
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• Parametric Dependence of Bound States in the Continuum on Periodic Structures
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• Excitation of a bound state in the continuum via spontaneous symmetry breaking
• Strong optical coupling in metallo-dielectric hybrid metasurfaces
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• On the robustness of bound states in the continuum in waveguides with lateral leakage channels
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• Enhanced five-photon photoluminescence in subwavelength AlGaAs resonators
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• Resonant field enhancement in lossy periodic structures supporting complex bound states in the continuum
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• Dissipative switching waves and solitons in the systems with spontaneously broken symmetry
• Dispersive optomechanics of supercavity modes in high-index disks
• Supercavity Modes in Stacked Identical Mie-resonant Metasurfaces
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• Luminescence Enhancement in One-Dimensional Mie-Resonant Arrays
• Nonlinear Mid-infrared Metasurface based on a Phase-Change Material
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• Theory, observation and ultrafast response of novel hybrid anapole states
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• Observation of bound states in the continuum in a micromechanical resonator
• Ultra-Spatiotemporal Light Confinement in Dielectric Nanocavity Metasurfaces
• Bound states in the continuum in cuprous oxide quantum wells
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• Broadband Low-loss Unidirectional Reflection On-chip with Asymmetric Dielectric Metasurface
• Controllable Optical Resonances and Unidirectional Scattering by Core-shell Nanoparticles
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• Bound states and decay dynamics in $N$-level Friedrichs model with factorizable interactions
• Spontaneous symmetry breaking and the dynamics of three interacting nonlinear optical resonators with gain and loss
• Nonlinear and Ultrafast All-Dielectric Metasurfaces at the Center for Integrated Nanotechnologies
• Electromagnetic Scattering by Networks of High-Permittivity Thin Wires