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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

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Published on: March 22, 2019

Broadband infrared light source by simultaneous parametric down-conversion.

Masayuki Hojo¹, Koichiro Tanaka²

¹Department of Physics, Science, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto, 606-8224, Japan. hojo.masayuki.33e@st.kyoto-u.ac.jp.

Scientific Reports

|September 10, 2021

Summary

This summary is machine-generated.

We developed a new spontaneous parametric down-conversion process for generating tunable, broadband infrared photon pairs. This quantum light source is ideal for advanced material identification, chemical analysis, and gas sensing applications.

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Area of Science:

Quantum optics
Nonlinear optics
Spectroscopy

Background:

Spontaneous parametric down-conversion (SPDC) is crucial for quantum light sources in the 2-5 µm infrared region.
Current SPDC methods using nonlinear crystals offer limited tunability and spectral range due to phase-matching constraints.

Purpose of the Study:

To overcome limitations in tunability and spectral range for infrared photon pair generation.
To introduce a novel SPDC process for enhanced quantum infrared spectroscopy.

Main Methods:

Utilizing periodically poled stoichiometric lithium tantalate (PPSLT) as the nonlinear medium.
Implementing a novel SPDC process enabling simultaneous visible and infrared photon pair production.

Main Results:

Achieved broadband and tunable generation of infrared photon pairs.
Demonstrated a new method for creating dual-spectrum photon pairs (visible and infrared).

Conclusions:

The novel SPDC process offers a superior alternative for quantum infrared spectroscopy.
This advancement expands the utility of SPDC for material identification, chemical analysis, and gas sensing.