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

Abstract

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