Broadband tunable hybrid photonic crystal-nanowire light emitter

TL;DR

This paper demonstrates a tunable hybrid light emitter by integrating semiconductor nanowires into photonic crystal cavities, achieving high Q-factors and spectral tuning at room temperature, with potential for diverse active materials.

Contribution

It introduces a scalable method for integrating nanowires into photonic crystals with tunable emission, enabling broad spectral coverage and high-quality emission at room temperature.

Findings

Achieved Q-factor up to 5000 in nanowire emitters.

Demonstrated spectral tuning across the emission range.

Integrated over 100 nanowires in a single process.

Abstract

We integrate about 100 single Cadmium Selenide semiconductor nanowires in self-standing Silicon Nitride photonic crystal cavities in a single processing run. Room temperature measurements reveal a single narrow emission linewidth, corresponding to a Q-factor as large as 5000. By varying the structural parameters of the photonic crystal, the peak wavelength is tuned, thereby covering the entire emission spectral range of the active material. A very large spectral range could be covered by heterogeneous integration of different active materials.