Simultaneous four-photon luminescence, third-harmonic generation, and second-harmonic generation microscopy of GaN
Journal
Optics Letters
Journal Volume
30
Journal Issue
18
Pages
2463-2465
Date Issued
2005
Author(s)
Abstract
We demonstrate what is to our knowledge the first example of four-photon luminescence microscopy in GaN and apply it to quality mapping of bulk GaN. The simultaneously acquired second- and third-harmonic generation can be used to map the distribution of the piezoelectric field and the band-tail state density, respectively. Through spectrum- and power-dependent studies, the fourth power dependence of the band edge luminescence is confirmed. The superb spatial resolution of the four-photon luminescence modality is also demonstrated. This technique provides a high-resolution, noninvasive monitoring and tool for examining the physical properties of semiconductors.
SDGs
Type
journal article