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

doi:10.1039/c6cp02163h

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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.

Titolo:	Comb-assisted cavity ring-down spectroscopy of a buffer-gas-cooled molecular beam
Autori:	Santamaria, Luigi Sarno, Valentina Di DE NATALE, PAOLO Rosa, Maurizio De INGUSCIO, MASSIMO Mosca, Simona Ricciardi, Iolanda CALONICO, DAVIDE LEVI, FILIPPO Maddaloni, Pasquale mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2016
Rivista:	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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.
Handle:	http://hdl.handle.net/11696/57397
Appare nelle tipologie:	1.1 Articolo in rivista

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