Planck Spectroscopy (Laser Photonics Rev. 15(10)/2021)

Planck Spectroscopy Existing spectrometers rely on wavelength-selective optical components such as gratings or prisms. As featured the cover, a new spectroscopic technique–Planck spectroscopy–that does not require any is demonstrated in article number 2100121 by Mikhail A. Kats and co-workers. The technique relies fundamental relationship that relates temperature to spectrum of blackbody radiation can be implemented using only heater, photodetector, computational algorithm.[Image credit: X. Zou]