2.4k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Max Planck SocietyDE178 papers
- Freie Universität BerlinDE80 papers
- Centre National de la Recherche ScientifiqueFR67 papers
- University of the Basque CountryES53 papers
- Technische Universität BerlinDE51 papers
- Goethe University FrankfurtDE42 papers
- Deutsches Elektronen-Synchrotron DESYDE39 papers
- Humboldt-Universität zu BerlinDE37 papers
- Material Physics CenterES36 papers
- Max Planck Institute for the Structure and Dynamics of MatterDE35 papers
- Technical University of MunichDE31 papers
- Lawrence Berkeley National LaboratoryUS30 papers
34 papers · 1 filter
Ultrafast Nano-Imaging and Optical Control of Hyperbolic Phonon Polaritons at hBN/WS Heterojunctions
Kazuki Kamada, Keisuke Shinokita, Fanyu Zeng +7
Manipulating nanoscale light-matter interactions on ultrafast time scales is indispensable for future polaritonic devices. Hyperbolic phonon polaritons (HPhPs) in van der Waals mat…
Ultraconfined THz Phonon Polaritons in Hafnium Dichalcogenides
R. A. Kowalski, N. S. Mueller, G. Álvarez-Pérez +18
The confinement of electromagnetic radiation to subwavelength scales relies on strong light-matter interactions. In the infrared (IR) and terahertz (THz) spectral ranges, phonon po…
Picocavity-Enhanced Raman Spectroscopy of Physisorbed H and D Molecules
Akitoshi Shiotari, Shuyi Liu, George Trenins +4
We report on tip-enhanced Raman spectroscopy of H2 and D2 molecules physisorbed within a plasmonic picocavity at 10 K. The intense Raman peaks resulting from the rotational and vib…
Scattering near-field optical microscopy at 1-nm resolution using ultralow tip oscillation amplitudes
Akitoshi Shiotari, Jun Nishida, Adnan Hammud +4
Scattering-type scanning near-field optical microscopy (s-SNOM) allows for the observation of the optical response of material surfaces with a resolution far below the diffraction…
Sum-Frequency Generation Spectro-Microscopy in the Reststrahlen Band of Wurtzite-type Aluminum Nitride
Dorothée S. Mader, Richarda Niemann, Martin Wolf +2
Nonlinear-optical microscopy and spectroscopy provide detailed spatial and spectroscopic contrast, specifically sensitive to structural symmetry and order. Ferroics, in particular,…
Rotating spintronic terahertz emitter optimized for microjoule pump-pulse energies and megahertz repetition rates
Alkisti Vaitsi, Vivien Sleziona, Luis E. Parra López +7
Spintronic terahertz emitters (STEs) are powerful sources of ultra-broadband single-cycle terahertz (THz) field transients. They work with any pump wavelength, and their polarity a…
Unidirectional Ray Polaritons in Twisted Asymmetric Stacks
J. Álvarez-Cuervo, M. Obst, S. Dixit +25
The vast repository of van der Waals (vdW) materials supporting polaritons offers numerous possibilities to tailor electromagnetic waves at the nanoscale. The development of twisto…
Layer-Resolved Resonance Intensity of Evanescent Polariton Modes in Anisotropic Multilayers
Nikolai Christian Passler, Giulia Carini, Dmitry N. Chigrin +1
Phonon polariton modes in layered anisotropic heterostructures are a key building block for modern nanophotonic technologies. The light-matter interaction for evanescent excitation…
Second Harmonic Generation from Grating-Coupled Hybrid Plasmon-Phonon Polaritons
Marcel Kohlmann, Christian Denker, Nikolai C. Passler +4
Polaritons can provide strong optical field enhancement allowing to boost light-matter interaction. Here, we experimentally observe enhancement of mid-infrared second-harmonic gene…
Average power scaling of THz spintronic emitters in reflection geometry
Tim Vogel, Alan Omar, Samira Mansourzadeh +10
Metallic spintronic THz emitters have become well-established for offering ultra-broadband, gap-less THz emission in a variety of excitation regimes, in combination with reliable f…
Infrared super-resolution wide-field microscopy using sum-frequency generation
Richarda Niemann, Sören Wasserroth, Guanyu Lu +6
Super-resolution microscopy in the visible is an established powerful tool in several disciplines. In the infrared (IR) spectral range, however, no comparable schemes have been dem…
Spintronic Sources of Ultrashort Terahertz Electromagnetic Pulses
Tom S. Seifert, Liang Cheng, Zhengxing Wei +2
Spintronic terahertz emitters are novel, broadband and efficient sources of terahertz radiation, which emerged at the intersection of ultrafast spintronics and terahertz photonics.…
Bright, polarization-tunable high repetition rate extreme ultraviolet beamline for coincidence electron-ion imaging
Antoine Comby, Etienne Bloch, Sandra Beauvarlet +9
After decades of supremacy of the Titanium:Sapphire technology, Ytterbium-based high-order harmonic sources are emerging as an interesting alternative for experiments requiring hig…
Discrete dispersion scan setup for measuring few-cycle laser pulses in the mid-infrared
Nils C. Geib, Richard Hollinger, Elissa Haddad +6
In this work, we demonstrate a discrete dispersion scan scheme using a low number of flat windows to vary the dispersion of laser pulses in discrete steps. Monte Carlo simulations…
Layer-Resolved Absorption of Light in Arbitrarily Anisotropic Heterostructures
Nikolai Christian Passler, Mathieu Jeannin, Alexander Paarmann
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…
Terahertz-Magnetic-Field Induced Ultrafast Faraday Rotation of Molecular Liquids
Vasileios Balos, Genaro Bierhance, Martin Wolf +1
Rotation of the plane of the polarization of light in the presence of a magnetic-field, known as the Faraday rotation, is a consequence of the electromagnetic nature of light and h…
Surface Polariton-Like s-Polarized Waveguide Modes in Switchable Dielectric Thin-Films on Polar Crystals
Nikolai Christian Passler, Andreas Heßler, Matthias Wuttig +2
Surface phonon polaritons (SPhP) and surface plasmon polaritons (SPP), evanescent modes supported by media with negative permittivity, are a fundamental building block of nanophoto…
Controlling Nanoscale Air-Gaps for Critically Coupled Surface Polaritons by Means of Non-Invasive White-Light Interferometry
Karsten Pufahl, Nikolai Christian Passler, Nicolai B. Grosse +3
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 surfa…
Strong Coupling of Epsilon-Near-Zero Phonon Polaritons in Polar Dielectric Heterostructures
Nikolai Christian Passler, Christopher R. Gubbin, Thomas Graeme Folland +7
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 adjace…
Second Harmonic Generation from Phononic Epsilon-Near-Zero Berreman Modes in Ultrathin Polar Crystal Films
Nikolai Christian Passler, Ilya Razdolski, D. Scott Katzer +4
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 fir…
Detecting Weak Signals from Interfaces by High Accuracy Phase-Resolved SFG Spectroscopy
Martin Thämer, R. Kramer Campen, Martin Wolf
Much work over the last 25 years has demonstrated that the interface-specific, alloptical technique, vibrational sum frequency generation (v-SFG) spectroscopy, is often uniquely ca…
Impact of pump wavelength on terahertz emission of a cavity-enhanced spintronic trilayer
Rosamund I. Herapath, Sam M. Hornett, T. Seifert +5
We systematically study the pump-wavelength dependence of terahertz pulse generation in thin-film spintronic THz emitters composed of a ferromagnetic Fe layer between adjacent nonm…
Surface plasmon-mediated nanoscale localization of laser-driven sub-THz spin dynamics in magnetic dielectrics
Alexander L. Chekhov, Alexander I. Stognij, Takuya Satoh +3
Ultrafast all-optical control of spins with femtosecond laser pulses is one of the hot topics at the crossroads of photonics and magnetism with a direct impact on future magnetic r…
Generalized 4 4 Matrix Formalism for Light Propagation in Anisotropic Stratified Media: Study of Surface Phonon Polaritons in Polar Dielectric Heterostructures
Nikolai Christian Passler, Alexander Paarmann
We present a generalized 4 4 matrix formalism for the description of light propagation in birefringent stratified media. In contrast to previous work, our algorithm is cap…