Share Email Print
cover

Proceedings Paper

Narrow linewidth quantum cascade lasers as ultra-sensitive probes of molecules
Author(s): Saverio Bartalini; Simone Borri; Pablo Cancio Pastor; Iacopo Galli; Giovanni Giusfredi; Davide Mazzotti; Paolo De Natale
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Recently, we have demonstrated that the "intrinsic" linewidth of Quantum Cascade Lasers (QCLs) can go beyond the radiative lifetime of the upper level. This represents the first demonstration of a sub-radiative linewidth for any laser. The intrinsic linewidth of a QCL can be as narrow as hundreds Hz, paving new ways for ultra-sensitive and precise harnessing and detection of molecules. We are working towards full exploitation of such intrinsic properties by designing appropriate phase-lock loops and enhancement-cavities for interaction with molecules. Combination with optical-frequency-comb-synthesizers and appropriate spectroscopic techniques, like saturated-cavity-ring-down-SCAR or polarization spectroscopy can provide unprecedented sensitivity and frequency accuracy for molecular detection.

Paper Details

Date Published: 24 January 2011
PDF: 6 pages
Proc. SPIE 7945, Quantum Sensing and Nanophotonic Devices VIII, 794505 (24 January 2011); doi: 10.1117/12.871401
Show Author Affiliations
Saverio Bartalini, CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Simone Borri, CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Pablo Cancio Pastor, CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Iacopo Galli, CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Giovanni Giusfredi, CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Davide Mazzotti, CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)
Paolo De Natale, CNR, Istituto Nazionale di Ottica (Italy)
European Lab. for Non-linear Spectroscopy (Italy)


Published in SPIE Proceedings Vol. 7945:
Quantum Sensing and Nanophotonic Devices VIII
Manijeh Razeghi; Rengarajan Sudharsanan; Gail J. Brown, Editor(s)

© SPIE. Terms of Use
Back to Top