Linewidth narrowing attributed to superradiance has been observed in near bandgap radiation due to the recombination of impact ionized carriers in n-type CdTe at room temperature. The light emission was associated with a current breakdown that occurred at a threshold field of 12,000 V/cm in highly compensated n-type samples.
Recombination radiation from electron-hole pairs generated by impact ionization has been observed in heavily doped CdTe at electric field intensities higher than those required to produce Gunn oscillations in lightly doped material. The suppression of the Gunn effect in the more heavily doped CdTe is attributed to a decrease in the magnitude of the negative differential mobility displayed by the drift velocity vs electric field characteristic resulting from the presence of ionized impurity scattering.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.