CAVITY RING-DOWN SPECTROSCOPY OF JET-COOLED YO MOLECULES

Paul, Anam C.

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https://hdl.handle.net/2142/104518 Copy

Description

Title

CAVITY RING-DOWN SPECTROSCOPY OF JET-COOLED YO MOLECULES

Author(s)

Paul, Anam C.

Contributor(s)

Liu, Jinjun ; Hu, Xiye ; Telfah, Hamzeh

Issue Date

2019-06-18

Keyword(s)

Radicals

Abstract

Yttrium (II) oxide (YO) is one of the first molecules that have been laser-cooled. Although the laser-cooling cycle in the reported experiment\footnote{ M. T. Hummon, M. Yeo, B. K. Stuhl, A. L. Collopy, Y. Xia, and J. Ye, \emph{Phys. Rev. Lett.} \textbf{110}, 143001 (2013) } involves the $\tilde A ^2 \Pi_{1/2} - \tilde X ^2 \Sigma ^+$ (0, 0) transition, ``dark’’ electronic states such as $\tilde A$'$^2 \Delta_{3/2}$ also play important roles and directly affect the cooling efficiency. Moreover, the forbidden $\tilde A$'$^2 \Delta_{3/2} - \tilde X ^2 \Sigma ^+$ transition can be utilized for further cooling of YO molecules.\footnote{ A. L Collopy, M. T Hummon, M. Yeo, B. Yan, and Jun Ye, \emph{New J. Phys.} \textbf{17}, 055008 (2015) } To better understand the ro-vibronic structure of YO, we have obtained and analyzed the cavity ring-down (CRD) spectrum of the $\tilde A ^2 \Pi_{3/2, 1/2} - \tilde X ^2 \Sigma ^+$ (0, 0) transition of jet-cooled YO molecules. Detection of the $\tilde A$'$^2 \Delta - \tilde X ^2 \Sigma ^+$ (0, 0) transition is in process. We will discuss experimental measures that will be taken to further improve the signal-to-noise ratio for the pursuit of “dark”-state spectra of YO and other candidate molecules for laser cooling.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/104518

DOI

10.15278/isms.2019.TD10

Copyright and License Information

Copyright 2019 Anam C. Paul

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