67 citations · 172 across the 8 of their papers we have counts for
9 papers
A two-color dual-oscillator infrared free-electron laser
Wieland Schöllkopf, Sandy Gewinner, Marco De Pas +16
We report on the design and performance of a two-color dual-oscillator infrared free-electron laser (FEL). The mid-infrared (MIR) FEL at the Fritz Haber Institute (FHI FEL) has bee…
Controlling isomer population using a dual-oscillator infrared free-electron laser
América Y. Torres-Boy, Anoushka Ghosh, Myles B. T. Osenton +8
We report on the control and characterization of the isomer population of ions inside superfluid helium nanodroplets, using two-color operation of a dual-oscillator infrared free-e…
Non-equilibrium state during proton-deuteron exchange at a liquid-liquid interface
Tillmann Buttersack, Niclas Sven Mueller, Giulia Carini +12
Proton-deuteron exchange is a very fast process, even across macroscopic length scales. Here we directly and quantitatively measure the formation of HDO within the first 100 micros…
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…
Surface phonon polariton resonance imaging using long-wave infrared-visible sum-frequency generation microscopy
Riko Kiessling, Yujin Tong, Alexander J. Giles +5
We experimentally demonstrate long-wave infrared-visible sum-frequency generation microscopy for imaging polaritonic resonances of infrared (IR) nanophotonic structures. This nonli…
Second-harmonic phonon spectroscopy of -quartz
Christopher J. Winta, Sandy Gewinner, Wieland Schöllkopf +2
We demonstrate midinfrared second-harmonic generation as a highly sensitive phonon spectroscopy technique that we exemplify using -quartz (SiO) as a model system. A midinfra…
Second Harmonic Generation from Critically Coupled Surface Phonon Polaritons
Nikolai Christian Passler, Ilya Razdolski, Sandy Gewinner +3
Mid-infrared nanophotonics can be realized using sub-diffractional light localization and field enhancement with surface phonon polaritons in polar dielectric materials. We experim…
Effects of Crystal Anisotropy on Optical Phonon Resonances in the Mid-Infrared Second Harmonic Response of SiC
Alexander Paarmann, Ilya Razdolski, Sandy Gewinner +2
We study the effects of crystal anisotropy on optical phonon resonances in the second harmonic generation (SHG) from silicon carbide (SiC) in its Reststrahl region. By comparing ex…
Resonant enhancement of second harmonic generation in the mid-infrared using localized surface phonon polaritons in sub-diffractional nanostructures
Ilya Razdolski, Yiguo Chen, Alexander J. Giles +8
We report on strong enhancement of mid-infrared second harmonic generation (SHG) from SiC nanopillars due to the resonant excitation of localized surface phonon-polaritons within t…