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Kyoto University Graduate School of Engineering and a research group at Shimadzu Corporation have developed an ultra-broadband quantum entangled light source that generates infrared photons at wavelengths from 2 to 5 µm and used this light to perform the world’s first successful quantum infrared spectroscopic analysis. This achievement will allow the identification of a variety of substances on compact and high-performance quantum infrared spectrometers that are expected to find use in medicine, security, environmental monitoring, and other applications. The basic technology developed by this research also has the potential to contribute to the development of quantum imaging in the infrared region and the development of quantum computers. The results of this research were published online on January 13, 2024, in the internationally recognized US journal Optica. Shimadzu’s contribution to this research was in the development of a chirped quasi-phase-matching device capable of generating quantum entangled light over a wide frequency range in the infrared region.

Paper information
Publishing journal: Optica
Paper title: Ultra-broadband quantum infrared spectroscopy
Authors: Toshiyuki Tashima (Kyoto University), Yu Mukai (Kyoto University), Masaya Arahata (Kyoto University), Norihide Oda (Kyoto University), Mamoru Hisamitsu (Shimadzu Corporation), Katsuhiko Tokuda (Shimadzu Corporation), Ryo Okamoto (Kyoto University), and Shigeki Takeuchi (Kyoto University)
DOI: 10.1364/OPTICA.504450