Related Experiment Video
Updated: Apr 13, 2026

High-Speed Atomic Force Microscopy Imaging of DNA Three-Point-Star Motif Self Assembly Using Photothermal Off-Resonance Tapping
Published on: March 22, 2024
Cavity-enhanced field-free molecular alignment at a high repetition rate
Craig Benko1, Linqiang Hua1,2, Thomas K Allison3
1JILA, NIST and the University of Colorado, 440 UCB, Boulder, Colorado 80309-0440, USA.
Abstract:
Extreme ultraviolet frequency combs are a versatile tool with applications including precision measurement, strong-field physics, and solid-state physics. Here we report on an application of extreme ultraviolet frequency combs and their driving lasers for studying strong-field effects in molecular systems. We perform field-free molecular alignment and high-order harmonic generation with aligned molecules in a gas jet at a repetition rate of 154 MHz using a high-powered optical frequency comb inside a femtosecond enhancement cavity. The cavity-enhanced system provides a means to reach suitable intensities to study field-free molecular alignment and enhance the observable effects of the molecule-field interaction. We observe modulations of the driving field, arising from the nature of impulsive stimulated Raman scattering responsible for coherent molecular rotations. We foresee the impact of this work on the study of molecule-based strong-field physics, with improved precision and a more fundamental understanding of the interaction effects on both the field and molecules.
Related Concept Videos
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
Atomic Nuclei: Magnetic Resonance
Atomic Nuclei: Nuclear Relaxation Processes
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
NMR Spectrometers: Resolution and Error Correction
NMR Spectroscopy: Spin–Spin Coupling

