Electrical control of a laterally ordered InAs/InP quantum dash array

TL;DR

This study demonstrates electrical control over the charge and emission energy of an array of quantum dashes, fabricated from self-assembled semiconductor wires, with potential applications in nanoscale optoelectronics.

Contribution

We fabricated and electrically manipulated a quantum dash array embedded in a nanogap, revealing control over individual dash properties despite inhomogeneity.

Findings

Electric charge of quantum dashes can be externally tuned.

Emission energy of quantum dashes can be modified with lateral electric fields.

Performance is limited by size inhomogeneity of the self-assembly process.

Abstract

We have fabricated an array of closely spaced quantum dashes starting from a planar array of self-assembled semiconductor quantum wires. The array is embedded in a metallic nanogap which we investigate by micro-photoluminescence as a function of a lateral electric field. We demonstrate that the net electric charge and emission energy of individual quantum dashes can be modified externally with performance limited by the size inhomogeneity of the self-assembling process.