Figure 6
From: InGaN Light-Emitting Diodes with an Embedded Nanoporous GaN Distributed Bragg Reflectors

The PL emission spectra of (a) the ST-LED and (b) the DBR-LED were measured through the angle-resolved PL measurements using a 405 nm diode laser as an excitation laser source. (c) The normalized far-field radiation pattern of both LED structures were observed.