And again, about lasing threshold, light localization, and density of states

TL;DR

This paper numerically explores how lasing threshold, density of states, and field localization interrelate in 1D photonic crystals, revealing complex dependencies and correlations crucial for optimizing laser designs.

Contribution

It provides a detailed numerical analysis of the relationship between lasing threshold, DOS, and localization in 1D photonic crystals, including angular and polarization effects.

Findings

Complex relationship between threshold and DOS near Brewster angle for p-polarization.

Strong correlation between threshold ratios and mode localizations for s-polarization.

Results can guide optimization of 1D photonic crystal lasers for various angles and polarizations.

Abstract

We investigated numerically the relationship between the lasing threshold, the density of states (DOS), and field localization in 1D photonic crystals (PC) for off-axis laser action. The angular dependence of the corresponding quantities for the two polarizations was obtained, and it was shown that the relationship between the threshold and DOS is complex, especially near the Brewster angle in the case of p-polarization. A strong correlation between the ratio of thresholds and localizations of the two edge modes was found for s-polarization. The results of this work can be used for optimizing lasers based on one-dimensional PCs, both for normal and off-axis lasing.