Sensors are perhaps the most important and integral components of our modern society.
With global warming and environmental pollution garnering ever-increasing attention, as …

A laser frequency comb is a broad spectrum composed of equidistant narrow lines. Initially
invented for frequency metrology, such combs enable new approaches to spectroscopy over …

Cooling atoms to ultralow temperatures has produced a wealth of opportunities in
fundamental physics, precision metrology, and quantum science. The more recent …

Femtochemistry techniques have been instrumental in accessing the short time scales
necessary to probe transient intermediates in chemical reactions. In this study, we took the …

Mid-infrared optical frequency combs are of significant interest for molecular spectroscopy
due to the large absorption of molecular vibrational modes on the one hand, and the ability …

In recent years, an increasingly large variety of molecular species have been successfully
cooled to low energies, and innovative techniques continue to emerge to reach ever more …

In many chemical reactions, the transformation from reactants to products is mediated by
transient intermediate complexes. For gas-phase reactions involving molecules with a few …

Photocatalytic reduction of carbon dioxide (CO2) by visible light has the potential to mimic
plant photosynthesis and facilitate the renewable production of storable fuels …

We demonstrate an on-chip, optoelectronic device capable of sampling arbitrary, low-
energy, near-infrared waveforms under ambient conditions with sub-optical-cycle resolution …

A coherent, compact and robust light source with coverage from the ultraviolet to the infrared
is desirable for heterodyne super-resolution imaging, broadband infrared microscopy …