We demonstrate continuous-wave cavity ring-down spectroscopy of a partially hydrodynamic molecular beam emerging from a buffer-gas-cooling source. Specifically, the (ν1 + ν3) vibrational overtone band of acetylene (C2H2) around 1.5 μm is accessed using a narrow-linewidth diode laser stabilized against a GPS-disciplined rubidium clock via an optical frequency comb synthesizer. As an example, the absolute frequency of the R(1) component is measured with a fractional accuracy of ∼1 × 10(-9). Our approach represents the first step towards the extension of more sophisticated cavity-enhanced interrogation schemes, including saturated absorption cavity ring-down or two-photon excitation, to buffer-gas-cooled molecular beams.

Comb-assisted cavity ring-down spectroscopy of a buffer-gas-cooled molecular beam / Santamaria, Luigi; Sarno, Valentina Di; DE NATALE, Paolo; Rosa, Maurizio De; Inguscio, Massimo; Mosca, Simona; Ricciardi, Iolanda; Calonico, Davide; Levi, Filippo; Maddaloni, Pasquale. - In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS. - ISSN 1463-9084. - 18:25(2016), p. 16715-20. [10.1039/c6cp02163h]

Comb-assisted cavity ring-down spectroscopy of a buffer-gas-cooled molecular beam

DE NATALE, PAOLO;Inguscio, Massimo;Calonico, Davide;Levi, Filippo;
2016

Abstract

We demonstrate continuous-wave cavity ring-down spectroscopy of a partially hydrodynamic molecular beam emerging from a buffer-gas-cooling source. Specifically, the (ν1 + ν3) vibrational overtone band of acetylene (C2H2) around 1.5 μm is accessed using a narrow-linewidth diode laser stabilized against a GPS-disciplined rubidium clock via an optical frequency comb synthesizer. As an example, the absolute frequency of the R(1) component is measured with a fractional accuracy of ∼1 × 10(-9). Our approach represents the first step towards the extension of more sophisticated cavity-enhanced interrogation schemes, including saturated absorption cavity ring-down or two-photon excitation, to buffer-gas-cooled molecular beams.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/57397
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