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Relationship between Microscopic Structure and Optical Property of Polycrystalline GaN on Silica Glass

Published online by Cambridge University Press:  17 March 2011

Hidetaka Kagatsume ,
Hiroaki Aono ,
Tsutomu Araki  and
Yasushi Nanishi
Hidetaka Kagatsume
Affiliation:
Department of Photonics, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu 525-8577, Japan
Hiroaki Aono
Affiliation:
Department of Photonics, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu 525-8577, Japan
Tsutomu Araki
Affiliation:
Department of Photonics, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu 525-8577, Japan
Yasushi Nanishi
Affiliation:
Department of Photonics, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu 525-8577, Japan
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Abstract

We have investigated relationships between the microscopic structure and optical property of polycrystalline GaN grown by (electron-cyclotron-resonance plasma-excited molecular beam epitaxy) ECR-MBE on silica glass substrates, using scanning electron microscope (SEM) and cathodoluminescence (CL). It was found that CL intensity was stronger for the samples with a large columnar domain size. These individual columnar domains showed clear luminescence. It was found that the origin of strong luminescence from polycrystalline GaN is due to such a columnar domain. That luminescence was closely related to the morphology of the columnar domains. It was revealed that the columnar domain with a homogeneous and hexagonal shape showed clear luminescence.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 639: Symposium G – GaN and Related Alloys-2000 , 2000 , G6.43
Copyright
Copyright © Materials Research Society 2001

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References

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