Emission from the defect level in alumina nanohole array photonic crystal with selective injection of functional polymer

An alumina nanohole array is composed of highly ordered nanoholes with a high aspect ratio (Masuda et al, 1997). The array is considered to be two-dimensional (2D) photonic crystal, and a photonic band gap has been confirmed (Masuda et al, 1999 and 2000). Fabrication of point defects or line defects in an alumina nanohole array is an attractive approach to achieve a functional photonic crystal-like photonic band-gap laser. Selective injection of nanoholes with functional polymer enables us to obtain such point defects. In this paper, we demonstrate the fabrication of functional defects in an alumina nanohole array by selective polymer injection and emission from the defect level in the photonic band gap.