Nanobeam Photonic Crystal Cavity Light-Emitting Diodes

TL;DR

This paper demonstrates electrically driven nanobeam photonic crystal cavities with embedded quantum dots, showing promising electroluminescence and potential for lasing, enabling advanced nanophotonic device applications.

Contribution

It introduces a novel electrically driven nanobeam cavity design with high current densities and room temperature electroluminescence from embedded quantum dots.

Findings

Bright electroluminescence at 1250 nm from quantum dots.

High current densities achievable at low power.

Potential for lasing demonstrated through differential gain.

Abstract

We present results on electrically driven nanobeam photonic crystal cavities formed out of a lateral p-i-n junction in gallium arsenide. Despite their small conducting dimensions, nanobeams have robust electrical properties with high current densities possible at low drive powers. Much like their two-dimensional counterparts, the nanobeam cavities exhibit bright electroluminescence at room temperature from embedded 1,250 nm InAs quantum dots. A small room temperature differential gain is observed in the cavities with minor beam self-heating suggesting that lasing is possible. These results open the door for efficient electrical control of active nanobeam cavities for diverse nanophotonic applications.