LASER-COOLABLE ASYMMETRIC TOP MOLECULES

Augenbraun, Benjamin

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https://hdl.handle.net/2142/107707 Copy

Description

Title

LASER-COOLABLE ASYMMETRIC TOP MOLECULES

Author(s)

Augenbraun, Benjamin

Contributor(s)

Doyle, John M.; Zelevinsky, Tanya ; Kozyryev, Ivan ; Steimle, Timothy ; Mengesha, Ephriem Tadesse

Issue Date

25-Jun-20

Keyword(s)

Vibrational structure/frequencies

Abstract

We identify a diverse class of alkaline-earth containing asymmetric top molecules, ranging from bent triatomics to molecules containing carbon rings, which can be laser cooled effectively with reasonable experimental complexity. Potential scientific impacts of these species span frontiers in controlled chemistry, quantum simulation, and searches for physics beyond the Standard Model of particle physics. We calculate vibrational branching ratios for over a dozen such molecules using a GF-matrix approach. As part of this analysis, we also describe methods to achieve rotationally closed optical cycles in these molecules. Using dispersed laser-induced fluorescence, we experimentally determine vibrational branching ratios and radiative lifetimes for the low-lying electronic states of CaSH and CaNH2, two prototypical laser-coolable asymmetric tops. Both species are found to be highly favorable for direct laser cooling. These measurements are compared to \textit{ab initio} predictions. We present a practical roadmap to laser cool asymmetric top molecules, including chiral species.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

English

Permalink

http://hdl.handle.net/2142/107707

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