Tunability of Planar Photonic Crystal Nanocavity: A Comparative study

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.