High-resolution spectroscopy on cold electrically trapped formaldehyde
Abstract
We present precision spectroscopy on electrically trapped formaldehyde (HCO), demonstrating key attributes which will enable molecular spectroscopy with unprecedented precision. Our method makes use of a microstructured electric trap with homogeneous fields in the trap center and rotational transitions with minimal Stark broadening at a 'magic' offset electric field. Using molecules cooled to the low millikelvin temperature regime via optoelectrical Sisyphus cooling, we reduce Stark broadening on the () transition at 364 GHz to well below 1 kHz, observe Doppler-limited linewidths down to 3.8 kHz, and determine the line position with sub-kHz uncertainty. Our results and clear prospects for even narrower spectra pave the way towards in-trap precision spectroscopy on diverse molecule species.
Cite
@article{arxiv.1807.06618,
title = {High-resolution spectroscopy on cold electrically trapped formaldehyde},
author = {Alexander Prehn and Martin Ibrügger and Gerhard Rempe and Martin Zeppenfeld},
journal= {arXiv preprint arXiv:1807.06618},
year = {2018}
}