Single quantum dot nanowire LEDs.

Minot, Ethan D; Kelkensberg, Freek; van Kouwen, Maarten; van Dam, Jorden A; Kouwenhoven, Leo P; Zwiller, Valery; Borgström, Magnus T; Wunnicke, Olaf et al. · Nano Lett · 2007

basic_science · Level V

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Abstract

We report reproducible fabrication of InP-InAsP nanowire light-emitting diodes in which electron-hole recombination is restricted to a quantum-dot-sized InAsP section. The nanowire geometry naturally self-aligns the quantum dot with the n-InP and p-InP ends of the wire, making these devices promising candidates for electrically driven quantum optics experiments. We have investigated the operation of these nanoLEDs with a consistent series of experiments at room temperature and at 10 K, demonstrating the potential of this system for single photon applications.