Tunability of Planar Photonic Crystal Nanocavity: A Comparative study

TL;DR

This study compares the tunability of different planar photonic crystal nanocavities using finite domain time domain simulations, highlighting the effects of material losses and quality factors on tunability.

Contribution

It provides a comparative analysis of three cavity types with different active materials, revealing the relationship between quality factor, material loss, and tunability.

Findings

High quality factor cavities exhibit lower tunability.

Greater material loss results in increased tunability.

Graphene and BaTiO3 enable electrical tunability in cavities.

Abstract

A comparative study of the tunability of planar photonic crystal nanocavities is done in this work. Three different types of cavities, e.g., defect cavity, double heterostructure cavity and bandedge cavity are studied using finite domain time domain method. Electrically tunable materials like Graphene and ferroelectric BaTiO3 is used as the active materials. We found that high quality factor cavities have lower tunability and greater loss in the material leads to greater tunability.