We can offer a selection of infrared (NIR and SWIR) down-converting phosphors and films that respond to visible light excitation, including blue and red LEDs or lasers. IR materials are used for security, imaging, and spectroscopy applications. Some of the most promising infrared phosphors are systems doped with various combinations and ratios of Ce, Cr, Yb, Ho, Pr, and/or Er. In most cases, co-dopants are used as sensitizers for energy transfer between the visible and infrared parts of the spectrum. For example, SWIR emission can be achieved using visible light excitation by energy transfer between various radiative centers. By optimizing the host composition and dopants, it is possible to achieve single- or dual-band IR emitters over a wide spectral range. The following chart illustrates some examples of fluorescent infrared-emitting phosphors. Many of those can also be supplied in film or large sheet formats.
We have also achieved laser-pumped thermal emission covering the mid-wave (MWIR) and long-wave (LWIR) spectral range using ceramic phosphors. A 445nm solid-state blue laser combined with an infrared phosphor can generate a broad IR emission covering the NIR, SWIR, MWIR, and LWIR spectral range.
MWIR Photos of Laser-pumped Ceramic IR Phosphor (Captured using InSb Camera: 3.5-5.1 microns)