Abstract

We report an analysis of one-dimensional rod-based photonic crystal nanocavities. These cavities offer opportunities for dielectric materials which lack a matching low-refractive index substrate or are limited in under-etching possibilities to create slab-based PhC cavities. They offer high theoretical ${Q}$-values exceeding ${{10}^6}$ for transverse magnetic polarized modes with modal volumes below ${2.5}\;{(\lambda /n)^3}$. For practical implementations, we propose embedding these structures in a low-refractive index polymer. An analysis of intentionally introduced variations in a rod diameter reveals which design directions should be followed in order to create cavities that are most robust for fabrication-induced variations.

© 2021 Optical Society of America

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