Work

Letokhov-Chebotayev Intracavity Trapping Spectroscopy of H 2

Year: 2025

Type: article

Abstract: In the early days of laser spectroscopy, Letokhov and Chebotayev proposed a scheme for measuring narrow spectral lines where the resolution is not restricted to Doppler effects because the molecules are entrained in a standing-wave light field. Now, such one-dimensional trapping in the intensity maxima of an intracavity field, slightly detuned from resonance, is experimentally demonstrated in the measurement of the very weak S(0) (2-0) quadrupole overtone transition in H_{2} at 1189 nm. The trapping manifests as an extremely narrow absorption feature at the predicted zero-recoil position, a 70 kHz shift from the blue-recoil component observed in Lamb-dip spectroscopy. A quantitative analysis of the saturation and trapping conditions supports the findings.

Source: Physical Review Letters

DOI: 10.1103/rxcj-6dw6

Authors: Wim Ubachs, Frank M. J. Cozijn, Meissa L. Diouf, Clement Lauzin, Hubert Jóźwiak, Piotr Wcisło

Institutions: Vrije Universiteit Amsterdam, UCLouvain, Nicolaus Copernicus University

Language: English

Topic: Spectroscopy and Laser Applications

Subfield: Spectroscopy

Field: Chemistry

Domain: Physical Sciences

Open Access status: green

Funders: European Partnership on Metrology, European Commission, HORIZON EUROPE Research Infrastructures

Awards: G4027858219, G7521467390, G7642730041