Toward quantum state resolved infrared frequency comb spectroscopy of the C60 fullerene

Changala, Bryan

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https://hdl.handle.net/2142/100830 Copy

Description

Title

Toward quantum state resolved infrared frequency comb spectroscopy of the C60 fullerene

Author(s)

Changala, Bryan

Contributor(s)

• Ye, Jun
• Fermann, Martin
• Lee, Kevin
• Weichman, Marissa L.

Issue Date

2018-06-20

Keyword(s)

Mini-symposium: Frequency-Comb Spectroscopy

Abstract

In this talk, we report on progress toward high resolution infrared frequency comb spectroscopy of buckminsterfullerene, C60. A rotationally resolved spectrum of C60 has to date remained elusive, despite the very intense research into this molecule’s chemical and physical properties since its discovery in 1985. Our approach utilizes cyrogenic buffer gas cooling of the output of a 1000 K effusive oven to prepare cold gas phase C60 molecules. We subsequently probe these with a difference frequency generation-based frequency comb tuned to the 8.5 µm IR active fundamental. The combination of a high finesse absorption enhancement cavity and Fourier transform interferometry read-out provide sensitive, broadband detection, while retaining the high spectral resolution of the frequency comb light. We will discuss our preliminary results, which tentatively suggest successful ground state vibrational cooling and observation of resolved rotational fine structure, as well as experimental modifications that we expect to improve the C60 number density and internal state cooling efficiency.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/100830

DOI

10.15278/isms.2018.WG06

Copyright and License Information

Copyright 2018 Bryan Changala

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