Affiliation:
1. Nanoscience Laboratory, Department of Physics University of Trento Via Sommarive 14 Trento 38123 Italy
2. ICFO‐Institut de Ciencies Fotoniques Castelldefels Barcelona 08860 Spain
Abstract
AbstractA ghost spectroscopy measurement with an entangled photon source is demonstrated. The transmission spectrum at the 2 m absorption peak of gaseous carbon dioxide (CO2) is measured in a highly noisy environment. Despite the noise, a high sensitivity is obtained, a value that is larger than the one found for a classical spectroscopy measurement performed in the same conditions. The probe photons are time‐energy correlated photon pairs generated through intermodal spontaneous four‐wave mixing in a silicon waveguide. This observation opens the way to low‐cost on‐chip MIR sensors insensitive to environmental noise.
Funder
Provincia Autonoma di Trento
HORIZON EUROPE Marie Sklodowska-Curie Actions
Subject
Electrical and Electronic Engineering,Computational Theory and Mathematics,Condensed Matter Physics,Mathematical Physics,Nuclear and High Energy Physics,Electronic, Optical and Magnetic Materials,Statistical and Nonlinear Physics