Vertical high emission in photonic crystal nanocavities by band-folding design

Abstract

We demonstrate reshaping of the radiation pattern emitted from photonic crystal nanocavities. More than 80% of the radiated power can be collected by an optics having numerical aperture of 0.6. This technique is very robust against disorders. The band folding method can be applied to almost any kind of cavity in order to reach stronger and more directive emission.