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A research team from Kyoto University has significantly enhanced infrared spectroscopy technology by integrating a quantum light source, overcoming the limitations of conventional Fourier transform infrared spectrometers (FTIRs) related to sensitivity and size. This innovation has resulted in ultra-broadband, quantum-entangled light capable of generating infrared photons in a range from 2 μm to 5 μm. The new technology promises the development of compact, portable, battery-operated scanners, making it easier to perform on-site material investigations in fields like environmental monitoring, medicine, and security.
Shigeki Takeuchi, from the Department of Electronic Science and Engineering, highlights that the team’s work improves both the sensitivity and scalability of infrared spectroscopy. Their method utilizes chirped quasi-phase-matching to produce quantum-entangled light across a wider bandwidth, a significant advancement compared to previous protocols limited to under 1 μm.
The research is part of the broader quest to develop practical quantum technologies, including improved sensitivity in infrared spectroscopy and quantum imaging. The project received support from various Japanese governmental initiatives aimed at advancing science and technology. This breakthrough sets the stage for the next generation of high-performance, portable spectrometers capable of identifying a diverse range of materials.
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