In this work, we investigate the application of intermodal spontaneous four wave mixing (SFWM) to ghost spectroscopy in the mid-infrared (MIR) spectral region. This technique is of great interest for MIR sensing, being able to overcome the limitations faced by MIR detectors in terms of background noise and dark counts. Through intermodal SFWM in a Silicon-On-Insulator (SOI) waveguide, two temporally correlated photons are generated: using a standard C-band pump, the idler photon is in the near-infrared (NIR) and the signal photon is in the MIR. The integrated source, with a coincidence to accidental ratio (CAR) of 114 +/- 4, is used to demonstrate that, in situations of environmental noise, ghost spectroscopy yields advantages with respect to the traditional absorption spectroscopy. The time-energy entanglement of the photon pairs is used to enhance the visibility of the measurement against noisy background conditions and to increase the spectral resolution in the MIR by spectral filtering the NIR photons. Modeling and experimental data support these improvements.

An integrated entangled photons source for mid-infrared ghost spectroscopy / Sanna, M.; Rizzotti, D.; Signorini, S.; Pavesi, L.. - ELETTRONICO. - 12009:(2022), p. 69. (Intervento presentato al convegno SPIE Photonic West tenutosi a San Francisco (California, USA) nel 22nd-27th January 2022) [10.1117/12.2608514].

An integrated entangled photons source for mid-infrared ghost spectroscopy

Sanna M.
Primo
;
Signorini S.
Penultimo
;
Pavesi L.
Ultimo
2022-01-01

Abstract

In this work, we investigate the application of intermodal spontaneous four wave mixing (SFWM) to ghost spectroscopy in the mid-infrared (MIR) spectral region. This technique is of great interest for MIR sensing, being able to overcome the limitations faced by MIR detectors in terms of background noise and dark counts. Through intermodal SFWM in a Silicon-On-Insulator (SOI) waveguide, two temporally correlated photons are generated: using a standard C-band pump, the idler photon is in the near-infrared (NIR) and the signal photon is in the MIR. The integrated source, with a coincidence to accidental ratio (CAR) of 114 +/- 4, is used to demonstrate that, in situations of environmental noise, ghost spectroscopy yields advantages with respect to the traditional absorption spectroscopy. The time-energy entanglement of the photon pairs is used to enhance the visibility of the measurement against noisy background conditions and to increase the spectral resolution in the MIR by spectral filtering the NIR photons. Modeling and experimental data support these improvements.
2022
An integrated entangled photons source for mid-infrared ghost spectroscopy
Sanna, Matteo Rizzotti, Davide Signorini,Stefano Pavesi, Lorenzo
1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SPIE-INT SOC OPTICAL ENGINEERING
9781510648890
9781510648906
Sanna, M.; Rizzotti, D.; Signorini, S.; Pavesi, L.
An integrated entangled photons source for mid-infrared ghost spectroscopy / Sanna, M.; Rizzotti, D.; Signorini, S.; Pavesi, L.. - ELETTRONICO. - 12009:(2022), p. 69. (Intervento presentato al convegno SPIE Photonic West tenutosi a San Francisco (California, USA) nel 22nd-27th January 2022) [10.1117/12.2608514].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/377568
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