Single quantum dot electroluminescence near [formula omitted

Abstract

We present the first electroluminescence spectra to resolve individual single quantum dot emission lines to the telecommunications transmission window at 1.3 μm . The dot is embedded within the i-region of a p– i– n diode to enable electrical excitation. Detection is performed using a cooled InGaAs array detector. Photoluminescence spectra of single quantum dots in small mesas (∼1 μm) reveal the complex emission line structure of these dots for the first time. Initial time-resolved electroluminescence measurements at wavelengths above 1 μm indicate lifetimes similar to those commonly measured in dots emitting around 900 nm .