Scientific Results

Narrow linewidth quantum cascade lasers as ultra-sensitive probes of molecules

Year: 2011

Authors: Bartalini S., Borri S., Cancio P., Galli I., Giusfredi G., Mazzotti D., De Natale P.

Autors Affiliation: Istituto Nazionale di Ottica (INO) – CNR, Largo E. Fermi 6, 50125 Firenze, Italy, and European Laboratory for Nonlinear Spectroscopy (LENS), via N. Carrara 1, 50019 Sesto Fiorentino (FI), Italy

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.

Conference title:
Place:

KeyWords: Frequency accuracy; Frequency metrology; Intrinsic property; Molecular detection; Narrow-line width; Phase lock loops; Polarization spectroscopy; Quantum cascades; Radiative lifetime; Spectroscopic technique, Infrared spectroscopy; Linewidth; Molecules; Nanophotonics; Quantum cascade lasers, Infrared lasers
DOI: 10.1117/12.871401

Citations: 1
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-10
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here

gdpr-image
This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more