Far-field emission profiles from L3 photonic crystal cavity modes

TL;DR

This paper experimentally and theoretically analyzes the far-field emission profiles of L3 photonic crystal cavity modes, linking them to near-field features and the effects of disorder, aiding emission engineering.

Contribution

It provides a detailed experimental characterization of far-field profiles and connects them to near-field features using a Fabry-Perot model, including disorder effects.

Findings

Good agreement between experiments and FDTD simulations.

Far-field profiles are linked to near-field cavity mode features.

Disorder impacts the far-field emission profiles.

Abstract

We experimentally characterize the spatial far-field emission profiles for the two lowest confined modes of a photonic crystal cavity of the L3 type, finding a good agreement with FDTD simulations. We then link the far-field profiles to relevant features of the cavity mode near-fields, using a simple Fabry-Perot resonator model. The effect of disorder on far-field cavity profiles is clarified through comparison between experiments and simulations. These results can be useful for emission engineering from active centers embedded in the cavity.