"Vibrational Bending Modes Metrology In The 670-720 <span Class=""roman"">cm</span>^&#8722;1range"

Gatti, Davide

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https://hdl.handle.net/2142/111088 Copy

Description

Title

"Vibrational Bending Modes Metrology In The 670-720 cm⁻¹range"

Author(s)

Gatti, Davide

Contributor(s)

• Marangoni, Marco
• Farooq, Aamir
• Schunemann, P. G.
• Laporta, Paolo
• Tamassia, Filippo
• Canè, Elisabetta
• Shakfa, Mohammad Khaled
• Gotti, Riccardo
• Lamperti, Marco

Issue Date

2021-06-24

Keyword(s)

Mini-symposium: Precision Spectroscopy for Fundamental Physics

Abstract

We introduce a comb-referenced optical spectrometer operating in the long-wavelength (LW) part of the mid-infrared (MIR) region. It is based on an innovative laser source based on difference frequency generation between two MIR lasers, namely a cw DFB-QCL and a CO$_{2}$ laser, which produces widely tunable light from 12.1 to 14.8 $\mu$m with optical power up to 110 $\mu$W and MHz-level linewidth. We exploit it to give the first evidence of bending modes metrology in this region, with the assessment of several CO$_{2}$-based frequency benchmarks with uncertainties down to 30 kHz, and the accurate study of the $\nu$$_{11}$ band of benzene, which is a significant testbed for the resolution of the spectrometer. These results foster optical metrology in a region not explored so far and pave the way for accurate rotationally-resolved studies of the energy structure of large molecules, such as aromatic hydrocarbons.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/111088

DOI

10.15278/isms.2021.RB12

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