Room-temperature mid-infrared single-photon spectral imaging. Infrared Spectroscopy: Fundamentals and Applications (Wiley, 2004). Mid-infrared detector development for the Origins Space Telescope. Mid-infrared tunable laser-based broadband fingerprint absorption spectroscopy for trace gas sensing: a review. Widely-tunable mid-infrared fiber-coupled quartz-enhanced photoacoustic sensor for environmental monitoring. Beyond human vision: the development and applications of infrared thermal imaging. in Terahertz and Mid Infrared Radiation: Detection of Explosives and CBRN (Using Terahertz) 153–165 (Springer, 2014). Mid-infrared emission prior to strong earthquakes analyzed by remote sensing data. Mid-infrared laser applications in medicine and biology. We anticipate that these lanthanide nanotransducers can be extended to MIR light manipulation at the microscale for chip-integrated device applications. We also developed a camera with lanthanide nanotransducers, which enable room-temperature MIR imaging. The ratiometric sensor based on lanthanide nanotransducers does not require cryogenic cooling, polarization control, phase matching or nanoantenna design for light confinement. Ratiometric modulation of luminescence enables a detection limit of ~0.3 nW × µm −2 with an internal quantum efficiency on the order of 3 × 10 −3. The ratiometric luminescence of lanthanide nanotransducers in the NIR region can be incoherently modulated by MIR radiation in the 4.5–10.8 µm wavelength range. Here we report lanthanide-based MIR-to-NIR nanotransducers that enable broadband MIR sensing at room temperature by harnessing ratiometric luminescence changes. Spectral conversion of mid-infrared (MIR) radiation to visible (VIS) and near-infrared (NIR) wavelengths is a fundamental technology for spectroscopy and imaging however, current MIR-to-VIS/NIR conversion technology is limited to nonlinear optics with bulky crystals or resonant nanocavities.
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