Abstract

In recent years there has been much interest in the investigation of the squeezing bandwidth of sub-Poissonian light from a light-emitting diode (LED),^1-4 According to the collective (or macroscopic) Coulomb blockade effect,¹ in the low-current regimen the squeezing bandwidth is proportional to a driving current and inversely proportional to the operating temperature and the junction capacitance of the light emitter, whereas in the high-current regime, it is determined by the radiative recombination lifetime. This effect is explained by a macroscopic behavior of many electrons as a group and the feedback mechanism of these electrons in a light emitter. Recently, we demonstrated that, at room temperature, the squeezing bandwidth in the low-current regime depends strongly on the driving current, and this dependence on the driving current is explained by the collective Coulomb-blockade effect.⁴ In this paper we have measured the squeezing bandwidth as a function of the operating temperature.

© 1998 Optical Society of America