Enhanced spontaneous emission from quantum dots in short photonic crystal waveguides

TL;DR

This paper demonstrates enhanced emission from quantum dots in short photonic crystal waveguides by leveraging slow-light effects and Fabry-Perot resonances, promising improved photon collection for quantum photonics.

Contribution

It provides experimental validation and simulation of enhanced quantum dot emission via slow-light and cavity effects in photonic crystal waveguides, advancing integrated quantum photonics.

Findings

Quantum dot emission intensity is strongly enhanced in resonance with Fabry-Perot modes.

Decay rates of quantum dots increase in the slow-light regime.

Experimental results agree with theoretical predictions and simulations.

Abstract

We report a study of the quantum dot emission in short photonic crystal waveguides. We observe that the quantum dot photoluminescence intensity and decay rate are strongly enhanced when the emission energy is in resonance with Fabry-Perot cavity modes in the slow-light regime of the dispersion curve. The experimental results are in agreement with previous theoretical predictions and further supported by three-dimensional finite element simulation. Our results show that the combination of slow group velocity and Fabry-Perot cavity resonance provides an avenue to efficiently channel photons from quantum dots into waveguides for integrated quantum photonic applications.