Molecular-Beam Spectroscopy with an Infinite Interferometer: Spectroscopic Resolution and Accuracy

TL;DR

This paper demonstrates that an interferometer with effectively infinite optical path difference can achieve unprecedented spectroscopic resolution and accuracy, exemplified by high-resolution rotational Raman spectra and analysis of current limitations.

Contribution

It introduces the concept of an infinite interferometer for spectroscopy and presents the highest resolution rotational Raman spectra to date, discussing future performance limits.

Findings

Achieved the highest resolution rotational Raman spectra.

Identified current and future limitations in spectroscopic performance.

Showcased the potential of infinite interferometry for enhanced resolution.

Abstract

An interferometer with effectively infinite maximum optical path difference removes the dominant resolution limitation for interferometric spectroscopy. We present mass-correlated rotational Raman spectra that represent the world's highest resolution scanned interferometric data and discuss the current and expected future limitations in achievable spectroscopic performance.