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Efficiency of cavity-enhanced high harmonic generation with geometric output coupling
Cavity-enhanced high-order harmonic generation (HHG) affords broadband, coherent extremeultraviolet (XUV) pulse trains with repetition rates of several tens of MHz. Geometrically coupling out the intracavity...
PublikationenInterferometric delay tracking for low-noise Mach-Zehnder-type scanning measurements
Precise delay control is of paramount importance in optical pump-probe measurements. Here, we report on a high-precision delay tracking technique for mechanical scanning measurements in a Mach-Zehnder...
PublikationenBroadband interferometric subtraction of optical fields
We present a Mach-Zehnder-like interferometer capable of simultaneous superoctave (950 – 2100 nm) destructive interference with an intensity extinction of 4 × 10−4. Achromatic nulling is achieved...
PublikationenCavity-enhanced noncollinear high-harmonic generation
Femtosecond enhancement cavities have enabled multi-10-MHz-repetition-rate coherent extreme ultraviolet (XUV) sources with photon energies exceeding 100 eV – albeit with rather severe limitations of...
PublikationenMid-infrared long-pass filter for high-power applications based on grating diffraction
A gold-coated silicon grating has been developed, enabling efficient spatial separation of broadband mid-infrared (MIR) beams with wavelengths >5 ìm from collinearly propagating, broadband, high-power...
PublikationenSub-optical-cycle light-matter energy transfer in molecular vibrational spectroscopy
The evolution of ultrafast-laser technology has steadily advanced the level of detail in studies of light-matter interactions. Here, we employ electric-fieldresolved spectroscopy and quantum-chemicalmodelling...
Publikationen | 08.03.2023Cavity-enhanced field-resolved spectroscopy
Femtosecond enhancement cavities1 are key to applications including high-sensitivity linear2–4 and nonlinear5,6 gas spectroscopy, as well as efficient nonlinear optical frequency conversion7–10. Yet,...
Publikationen | 08.03.2023Average power scaling of THz spintronic emitters efficiently cooled in reflection geometry
Metallic spintronic terahertz (THz) emitters have becomewell-established for offering ultra-broadband, gapless THz emission in a variety of excitation regimes, in combination with reliable fabrication...
Publikationen | 08.03.2023Enhanced intrapulse difference frequency generation in the mid-infrared by a spectrally dependent polarization state
We present a technique to optimize the intrapulse difference frequency generation efficiency for mid-infrared generation. The approach employs a multi-order wave plate that is designed to selectively rotate...
Publikationen | 08.03.2023Ultra-rapid electro-optic sampling of octave-spanning mid-infrared waveforms
We demonstrate ultra-rapid electro-optic sampling (EOS) of octave-spanning midinfrared pulses centered at 9 ìm, implemented by mechanically scanning a mirror with a sonotrode resonating at 19 kHz (forward...
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