Surface patterning of nonscattering phosphors for light extraction.

Journal: Optics Letters
Published:
Abstract

A two-dimensional TiO₂ photonic crystal layer is fabricated on Y3Al5O12:Ce3+ (YAG:Ce) yellow ceramic plate phosphor (CPP) to enhance its forward emission. A triangle lattice pattern is defined by molecular transfer lithography with polyvinyl alcohol nanostructured templates. A 4.5 improvement in yellow emission is achieved from photonic-crystal-structure (PhC) patterned YAG:Ce CPP compared to a nonpatterned one. The PhC-patterned YAG:Ce CPP shows a collimated far-field intensity emission pattern compared to the random-patterned and nonpatterned one.

Authors
An Mao, Robert Karlicek