Nikolai Christian Paßler
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View article: Layer-resolved resonance intensity of evanescent polariton modes in anisotropic multilayers
Layer-resolved resonance intensity of evanescent polariton modes in anisotropic multilayers Open
Phonon polariton modes in layered anisotropic heterostructures are a key building block for modern nanophotonic technologies. The light-matter interaction for evanescent excitation of such a multilayer system can be theoretically described…
View article: Second harmonic generation from grating-coupled hybrid plasmon–phonon polaritons
Second harmonic generation from grating-coupled hybrid plasmon–phonon polaritons Open
Polaritons can provide strong optical field enhancement allowing them to boost light–matter interaction. Here, we experimentally observe enhancement in mid-infrared second-harmonic generation (SHG) using grating-coupled surface phonon pola…
View article: Layer-Resolved Resonance Intensity of Evanescent Polariton Modes in Anisotropic Multilayers
Layer-Resolved Resonance Intensity of Evanescent Polariton Modes in Anisotropic Multilayers Open
Phonon polariton modes in layered anisotropic heterostructures are a key building block for modern nanophotonic technologies. The light-matter interaction for evanescent excitation of such a multilayer system can be theoretically described…
View article: Second Harmonic Generation from Grating-Coupled Hybrid Plasmon-Phonon Polaritons
Second Harmonic Generation from Grating-Coupled Hybrid Plasmon-Phonon Polaritons Open
Polaritons can provide strong optical field enhancement allowing to boost light-matter interaction. Here, we experimentally observe enhancement of mid-infrared second-harmonic generation (SHG) using grating-coupled surface phonon polariton…
View article: Hyperbolic shear polaritons in low-symmetry crystals
Hyperbolic shear polaritons in low-symmetry crystals Open
The lattice symmetry of a crystal is one of the most important factors in determining its physical properties. Particularly, low-symmetry crystals offer powerful opportunities to control light propagation, polarization and phase 1–4 . Mate…
View article: Hyperbolic Shear Polaritons in Low-Symmetry Crystals - Experimental Data
Hyperbolic Shear Polaritons in Low-Symmetry Crystals - Experimental Data Open
Data for Nature 602, pages 595–600 (2022), https://doi.org/10.1038/s41586-021-04328-y preprint: https://doi.org/10.21203/rs.3.rs-558805/v1 Contents: isotfrequency_surfaces.nb: Mathematica scripts generating Fig. 1c,d raw_data.zip: contains…
View article: Hyperbolic Shear Polaritons in Low-Symmetry Crystals - Experimental Data
Hyperbolic Shear Polaritons in Low-Symmetry Crystals - Experimental Data Open
Data for Nature 602, pages 595–600 (2022), https://doi.org/10.1038/s41586-021-04328-y preprint: https://doi.org/10.21203/rs.3.rs-558805/v1 Contents: isotfrequency_surfaces.nb: Mathematica scripts generating Fig. 1c,d raw_data.zip: contains…
View article: Hyperbolic Shear Polaritons in Low-Symmetry Crystals
Hyperbolic Shear Polaritons in Low-Symmetry Crystals Open
The lattice symmetry of a crystal is one of the most important factors in determining its physical properties. Particularly, low-symmetry crystals offer powerful opportunities to control light propagation, polarization and phase. Materials…
View article: Layer-resolved absorption of light in arbitrarily anisotropic heterostructures
Layer-resolved absorption of light in arbitrarily anisotropic heterostructures Open
We present a generalized formalism to describe the optical energy flow and spatially resolved absorption in arbitrarily anisotropic layered structures. The algorithm is capable of treating any number of layers of arbitrarily anisotropic, b…
View article: Active Nanophotonics: Surface Polariton‐Like s‐Polarized Waveguide Modes in Switchable Dielectric Thin Films on Polar Crystals (Advanced Optical Materials 5/2020)
Active Nanophotonics: Surface Polariton‐Like s‐Polarized Waveguide Modes in Switchable Dielectric Thin Films on Polar Crystals (Advanced Optical Materials 5/2020) Open
In the field of nanophotonics, the active manipulation of light is facilitated by polaritonic modes in nanoscale heterostructures. In their article number 1901056, Nikolai Christian Passler, Alexander Paarmann and co-workers present a swit…
View article: Phonon Polaritons in Polar Dielectric Heterostructures
Phonon Polaritons in Polar Dielectric Heterostructures Open
The field of nanophotonics aims at understanding and harnessing light-matter interaction in structures of dimensions far below the wavelength. By squeezing light into nanostructures, the local electric fields can be immensely enhanced, boo…
View article: Generalized 4 × 4 matrix formalism for light propagation in anisotropic stratified media: study of surface phonon polaritons in polar dielectric heterostructures: erratum
Generalized 4 × 4 matrix formalism for light propagation in anisotropic stratified media: study of surface phonon polaritons in polar dielectric heterostructures: erratum Open
In our paper J. Opt. Soc. Am. B 34, 2128 (2017) in Section 2.C, the calculation of the layer-dependent electric field distribution is only valid for media with permittivity tensors that are diagonal in the lab frame, i.e., non-birefringent…
View article: Generalized 4x4 matrix algorithm for light propagation in anisotropic stratified media (Matlab files)
Generalized 4x4 matrix algorithm for light propagation in anisotropic stratified media (Matlab files) Open
The attached Matlab functions allow to calculate reflection and transmission coefficients for any number of arbitrarily anisotropic or isotropc, absorbing and non-absorbing multilayer systems, as well as the full electric field distributio…
View article: Surface Polariton‐Like s‐Polarized Waveguide Modes in Switchable Dielectric Thin Films on Polar Crystals
Surface Polariton‐Like s‐Polarized Waveguide Modes in Switchable Dielectric Thin Films on Polar Crystals Open
Surface phonon polaritons (SPhPs) and surface plasmon polaritons (SPPs), evanescent modes supported by media with negative permittivity, are a fundamental building block of nanophotonics. These modes are unmatched in terms of field enhance…
View article: Second Harmonic Generation from Phononic Epsilon-Near-Zero Berreman Modes in Ultrathin Polar Crystal Films
Second Harmonic Generation from Phononic Epsilon-Near-Zero Berreman Modes in Ultrathin Polar Crystal Films Open
Immense optical field enhancement was predicted to occur for the Berreman mode in ultrathin films at frequencies in the vicinity of epsilon-near-zero (ENZ). Here, we report the first experimental proof of this prediction in the mid-infrare…
View article: Controlling the Infrared Dielectric Function through Atomic-Scale Heterostructures
Controlling the Infrared Dielectric Function through Atomic-Scale Heterostructures Open
Surface phonon polaritons (SPhPs) - the surface-bound electromagnetic modes of a polar material resulting from the coupling of light with optic phonons - offer immense technological opportunities for nanophotonics in the infrared (IR) spec…
View article: Controlling the Infrared Dielectric Function through\nAtomic-Scale Heterostructures
Controlling the Infrared Dielectric Function through\nAtomic-Scale Heterostructures Open
Surface\nphonon polaritons (SPhPs), the surface-bound electromagnetic\nmodes of a polar material resulting from the coupling of light with\noptic phonons, offer immense technological opportunities for nanophotonics\nin the infrared (IR) sp…
View article: Resonant Field Enhancement of Epsilon Near Zero Berreman Modes in an Ultrathin AlN Film
Resonant Field Enhancement of Epsilon Near Zero Berreman Modes in an Ultrathin AlN Film Open
Enormous optical field enhancement was predicted to occur for the Berreman mode in ultrathin films in the vicinity of epsilon near zero (ENZ). Here, we report the first experimental proof of this prediction in the mid-infrared by probing t…
View article: Controlling nanoscale air-gaps for critically coupled surface polaritons by means of non-invasive white-light interferometry
Controlling nanoscale air-gaps for critically coupled surface polaritons by means of non-invasive white-light interferometry Open
We report an experimental method to control large-area air-gaps in the nanometer range for evanescent coupling of light to surface waves such as surface plasmon polaritons or surface phonon polaritons. With the help of spectrally resolved …
View article: Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes
Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes Open
We experimentally investigate second harmonic generation from strongly coupled localized and propagative phonon-polariton modes in arrays of silicon carbide nanopillars. Our results clearly demonstrate the hybrid nature of the system's eig…
View article: Strong Coupling of Epsilon-Near-Zero Phonon Polaritons in Polar Dielectric Heterostructures
Strong Coupling of Epsilon-Near-Zero Phonon Polaritons in Polar Dielectric Heterostructures Open
We report the first observation of epsilon-near-zero (ENZ) phonon polaritons in an ultrathin AlN film fully hybridized with surface phonon polaritons (SPhP) supported by the adjacent SiC substrate. Employing a strong coupling model for the…
View article: Generalized 4 × 4 matrix formalism for light propagation in anisotropic stratified media: study of surface phonon polaritons in polar dielectric heterostructures
Generalized 4 × 4 matrix formalism for light propagation in anisotropic stratified media: study of surface phonon polaritons in polar dielectric heterostructures Open
We present a generalized 4 $\\times$ 4 matrix formalism for the description of\nlight propagation in birefringent stratified media. In contrast to previous\nwork, our algorithm is capable of treating arbitrarily anisotropic or\nisotropic, …
View article: Second-Harmonic Generation from Critically Coupled Surface Phonon Polaritons
Second-Harmonic Generation from Critically Coupled Surface Phonon Polaritons Open
Mid-infrared nanophotonics can be realized using subdiffractional light localization and field enhancement with surface phonon polaritons in polar dielectric materials. We experimentally demonstrate second-harmonic generation due to the op…