A. Femius Koenderink
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View article: Information advantage in sensing revealed by Fano-resonant Fourier scatterometry
Information advantage in sensing revealed by Fano-resonant Fourier scatterometry Open
Fano resonances in nanophotonic structures are attractive for sensing due to their ultanarrow resonant linewidths and high local fields. Conventional read out schemes rely on measuring a frequency shift in Fano scattering spectra as functi…
View article: Influence of Driving Pulse Properties on Third-Harmonic Diffraction from Quasi-BIC Metasurfaces
Influence of Driving Pulse Properties on Third-Harmonic Diffraction from Quasi-BIC Metasurfaces Open
Quasi-bound states in the continuum in dielectric metasurfaces support sharp Fano resonances that emerge from the interference between bright and dark modes. We exploit this modal interplay to demonstrate tunable third-harmonic emission, c…
View article: Structure-in-Void Quasi-Bound State in the Continuum Metasurface for Deeply Subwavelength Nanostructure Metrology
Structure-in-Void Quasi-Bound State in the Continuum Metasurface for Deeply Subwavelength Nanostructure Metrology Open
Fano lineshapes associated with quasi bound-state-in-the-continuum resonances, that are supported by dielectric metasurfaces, have the advantageous properties of being extremely sensitive to minute geometrical changes in the meta-atoms. We…
View article: Uncovering Hidden Resonances in Non‐Hermitian Systems with Scattering Thresholds
Uncovering Hidden Resonances in Non‐Hermitian Systems with Scattering Thresholds Open
The points where diffraction orders emerge or vanish in the propagating spectrum of periodic non‐Hermitian systems are referred to as scattering thresholds. Close to these branch points, resonances from different Riemann sheets can tremend…
View article: Absorption and amplification singularities in metasurface etalons with gain
Absorption and amplification singularities in metasurface etalons with gain Open
Passive reflective metasurfaces can possess perfect absorption conditions: Singular scattering anomalies at which all impinging light is absorbed. Perfect absorption is a common yet powerful metasurface design option with applications in e…
View article: Accessing Beyond-Light Line Dispersion and High-<i>Q</i> Resonances of Dense Plasmon Lattices by Bandfolding
Accessing Beyond-Light Line Dispersion and High-<i>Q</i> Resonances of Dense Plasmon Lattices by Bandfolding Open
Dense plasmon lattices are promising as experimentally accessible implementations of seminal tight-binding Hamiltonians, but the plasmonic dispersion of interest lies far beyond the light line and is thereby inaccessible in far-field optic…
View article: Metasurface-Based Phosphor-Converted Micro-LED Architecture for Displays─Creating Guided Modes for Enhanced Directionality
Metasurface-Based Phosphor-Converted Micro-LED Architecture for Displays─Creating Guided Modes for Enhanced Directionality Open
Phosphor-converted micro-light emitting diodes (micro-LEDs) are a crucial technology for display applications but face significant challenges in light extraction because of the high refractive index of the blue pump die chip. In this study…
View article: Nanometer Interlaced Displacement Metrology Using Diffractive Pancharatnam-Berry and Detour Phase Metasurfaces
Nanometer Interlaced Displacement Metrology Using Diffractive Pancharatnam-Berry and Detour Phase Metasurfaces Open
Resolving structural misalignments on the nanoscale is of utmost importance in areas such as semiconductor device manufacturing. Metaphotonics provides a powerful toolbox to efficiently transduce information on the nanoscale into measurabl…
View article: Near-Unity All-Optical Modulation of Third-Harmonic Generation with a Fano-Resonant Dielectric Metasurface
Near-Unity All-Optical Modulation of Third-Harmonic Generation with a Fano-Resonant Dielectric Metasurface Open
We demonstrate all-optical modulation with a near-unity contrast of nonlinear light generation in a dielectric metasurface. We study third-harmonic generation from silicon Fano-resonant metasurfaces excited by femtosecond pulses at 1480 nm…
View article: Spontaneous symmetry breaking in plasmon lattice lasers
Spontaneous symmetry breaking in plasmon lattice lasers Open
Spontaneous symmetry breaking (SSB) is key for our understanding of phase transitions and the spontaneous emergence of order. In this work, we report that, for a two-dimensional (2D) periodic metasurface with gain, SSB occurs in the lasing…
View article: Roadmap on photonic metasurfaces
Roadmap on photonic metasurfaces Open
Here we present a roadmap on Photonic metasurfaces. This document consists of a number of perspective articles on different applications, challenge areas or technologies underlying photonic metasurfaces. Each perspective will introduce the…
View article: Temporal Dynamics of Collective Resonances in Periodic Metasurfaces
Temporal Dynamics of Collective Resonances in Periodic Metasurfaces Open
Temporal dynamics of confined optical fields can provide valuable insights into light-matter interactions in complex optical systems, going beyond their frequency-domain description. Here, we present a new experimental approach based on in…
View article: Direct linearly polarized electroluminescence from perovskite nanoplatelet superlattices
Direct linearly polarized electroluminescence from perovskite nanoplatelet superlattices Open
Polarized light is critical for a wide range of applications, but is usually generated by filtering unpolarized light, which leads to substantial energy losses and requires additional optics. Here we demonstrate the direct emission of line…
View article: Hybrid cavity-antenna architecture for strong and tunable sideband-selective molecular Raman scattering enhancement
Hybrid cavity-antenna architecture for strong and tunable sideband-selective molecular Raman scattering enhancement Open
Plasmon resonances at the surface of metallic antennas allow for extreme enhancement of Raman scattering. Intrinsic to plasmonics, however, is that extreme field confinement lacks precise spectral control, which would hold great promise in…
View article: Spontaneous symmetry breaking in plasmon lattice lasers
Spontaneous symmetry breaking in plasmon lattice lasers Open
Spontaneous symmetry breaking (SSB) is key for our understanding of phase transitions and the spontaneous emergence of order. Photonics provide versatile systems to study SSB. In this work, we report that for a two-dimensional (2D) periodi…
View article: Hybrid cavity-antenna architecture for strong and tunable sideband-selective molecular Raman scattering enhancement
Hybrid cavity-antenna architecture for strong and tunable sideband-selective molecular Raman scattering enhancement Open
Plasmon resonances at the surface of plasmonic antennas allow for extremely strong enhancement of Raman scattering. Intrinsic to plasmonics, however, is that extreme field confinement lacks precise spectral control, which would hold great …
View article: Direct Linearly-Polarised Electroluminescence from Perovskite Nanoplatelet Superlattices
Direct Linearly-Polarised Electroluminescence from Perovskite Nanoplatelet Superlattices Open
Polarised light is critical for a wide range of applications, but is usually generated by filtering unpolarised light, which leads to significant energy losses and requires additional optics. Herein, the direct emission of linearly-polaris…
View article: Complementary Surface‐Enhanced Raman Scattering (SERS) and IR Absorption Spectroscopy (SEIRAS) with Nanorods‐on‐a‐Mirror
Complementary Surface‐Enhanced Raman Scattering (SERS) and IR Absorption Spectroscopy (SEIRAS) with Nanorods‐on‐a‐Mirror Open
The surface‐enhanced counterparts of Raman scattering (SERS) and infrared (IR) absorption (SEIRAS) are commonly used to probe and identify nanoscale matter and small populations of molecules. The contrasting selection rules offer complemen…
View article: Integrated Sideband-Resolved SERS with a Dimer on a Nanobeam Hybrid
Integrated Sideband-Resolved SERS with a Dimer on a Nanobeam Hybrid Open
In analogy to cavity optomechanics, enhancing specific sidebands of a Raman process with narrowband optical resonators would allow for parametric amplification, entanglement of light and molecular vibrations, and reduced transduction noise…
View article: Nanopatterning of Perovskite Thin Films for Enhanced and Directional Light Emission
Nanopatterning of Perovskite Thin Films for Enhanced and Directional Light Emission Open
Lead-halide perovskites offer excellent properties for lighting and display applications. Nanopatterning perovskite films could enable perovskite-based devices with designer properties, increasing their performance and adding novel functio…
View article: Extreme-Ultraviolet Shaping and Imaging by High-Harmonic Generation from Nanostructured Silica
Extreme-Ultraviolet Shaping and Imaging by High-Harmonic Generation from Nanostructured Silica Open
Coherent extreme-ultraviolet pulses from high-harmonic generation have ample applications in attosecond science, lensless imaging, and industrial metrology. However, tailoring complex spatial amplitude, phase, and polarization properties o…
View article: Over 65% Sunlight Absorption in a 1 μm Si Slab with Hyperuniform Texture
Over 65% Sunlight Absorption in a 1 μm Si Slab with Hyperuniform Texture Open
Thin, flexible, and invisible solar cells will be a ubiquitous technology in the near future. Ultrathin crystalline silicon (c-Si) cells capitalize on the success of bulk silicon cells while being lightweight and mechanically flexible, but…
View article: Super-resolution imaging: when biophysics meets nanophotonics
Super-resolution imaging: when biophysics meets nanophotonics Open
Probing light–matter interaction at the nanometer scale is one of the most fascinating topics of modern optics. Its importance is underlined by the large span of fields in which such accurate knowledge of light–matter interaction is needed…
View article: Information advantage from polarization-multiplexed readout of nanophotonic scattering overlay sensors
Information advantage from polarization-multiplexed readout of nanophotonic scattering overlay sensors Open
Nanophotonic structures are powerful tools for sensing, with the goal of retrieving parameters accurately at maximum speed and minimum photon budget. As information on those parameters can be distributed over multiple output scattering cha…
View article: Integrated Molecular Optomechanics with Hybrid Dielectric–Metallic Resonators
Integrated Molecular Optomechanics with Hybrid Dielectric–Metallic Resonators Open
Molecular optomechanics stems from the description of Raman scattering in the presence of an optical resonator using a cavity optomechanics formalism. We extend the molecular optomechanics formalism to the case of hybrid dielectric-plasmon…
View article: Photon Recycling in CsPbBr<sub>3</sub> All-Inorganic Perovskite Nanocrystals
Photon Recycling in CsPbBr<sub>3</sub> All-Inorganic Perovskite Nanocrystals Open
Photon recycling, the iterative process of re-absorption and re-emission of photons in an absorbing medium, can play an important role in the power-conversion efficiency of photovoltaic cells. To date, several studies have proposed that th…
View article: Hybrid photonic-plasmonic cavities based on the nanoparticle-on-a-mirror configuration
Hybrid photonic-plasmonic cavities based on the nanoparticle-on-a-mirror configuration Open
Hybrid photonic-plasmonic cavities have emerged as a new platform to increase light–matter interaction capable to enhance the Purcell factor in a singular way not attainable with either photonic or plasmonic cavities separately. In the hyb…
View article: Pseudochirality at exceptional rings of optical metasurfaces
Pseudochirality at exceptional rings of optical metasurfaces Open
Non-Hermitian optical metasurfaces have recently attracted interest as a platform for controlling light in amplitude, phase, and polarization. Here we predict that breaking parity-time symmetry in honeycomblike active plasmonic metasurface…