PreprintarXiv licencearXiv
Detuning-assisted cavity enhancement in spectroscopy
Abstract
Cavity-enhanced spectroscopy is a widely used experimental technique. We show that detuning the cavity frequency from the transition of interest can enhance the precision for dipole moment estimation by up to two orders of magnitude beyond the improvement when the cavity is resonant with the transition. We show this for both classical continuous-wave (CW) and pulsed single-photon probes, even in the presence of losses. We trace this enhancement to a detuning-controlled redistribution of information between the light- and matter-like polaritons, with losses determining the optimal branch. We show that this enhancement remains accessible using conventional photodetection and time-correlated single-photon counting.
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BibTeX
@misc{guha2026detuningassisted,
title = {{Detuning-assisted cavity enhancement in spectroscopy}},
author = {Subhasish Guha and Sourav Das and Francesco Albarelli and Aiman Khan and Elnaz Darsheshdar and Adam D. Wright and Animesh Datta},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.40216},
eprint = {2610.40216},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.40216},
}
RIS
TY - UNPB
TI - Detuning-assisted cavity enhancement in spectroscopy
AU - Subhasish Guha
AU - Sourav Das
AU - Francesco Albarelli
AU - Aiman Khan
AU - Elnaz Darsheshdar
AU - Adam D. Wright
AU - Animesh Datta
PY - 2026
DA - 2026/10/29
PB - arXiv
DO - 10.48550/arxiv.2610.40216
UR - https://arxiv.org/abs/2610.40216
AB - Cavity-enhanced spectroscopy is a widely used experimental technique. We show that detuning the cavity frequency from the transition of interest can enhance the precision for dipole moment estimation by up to two orders of magnitude beyond the improvement when the cavity is resonant with the transition. We show this for both classical continuous-wave (CW) and pulsed single-photon probes, even in the presence of losses. We trace this enhancement to a detuning-controlled redistribution of information between the light- and matter-like polaritons, with losses determining the optimal branch. We show that this enhancement remains accessible using conventional photodetection and time-correlated single-photon counting.
ER -