Alexandria Digital Research Library

Nonpolar m-plane GaN-based Laser Diodes in the Blue Spectrum

Author:
Kelchner, Kathryn Merced
Degree Grantor:
University of California, Santa Barbara.Electrical & Computer Engineering
Degree Supervisor:
DenBaars Steven
Place of Publication:
[Santa Barbara, Calif.]
Publisher:
University of California, Santa Barbara
Creation Date:
2012
Issued Date:
2012
Topics:
Electrical engineering and Materials Science
Keywords:
Blue
Nonpolar
Gallium Nitride
Laser Diode
Description:

Gallium nitride (GaN), together with its alloys with aluminum and indium, have revolutionized the solid-state optoelectronics market for their ability to emit a large portion of the visible electromagnetic spectrum from deep ultraviolet and into the infrared. GaN-based semiconductor laser diodes (LDs) with emission wavelengths in the violet, blue and green are already seeing widespread implementation in applications ranging from energy storage, lighting and displays. However, commercial GaN-based LDs use the basal c-plane orientation of the wurtzite crystal, which can suffer from large internal electric fields due to discontinuities in spontaneous and piezoelectric polarizations, limiting device performance. The nonpolar orientation of GaN benefits from the lack of polarization-induced electric field as well as enhanced gain. This dissertation discusses some of the benefits and limitations of m-plane oriented nonpolar GaN for LD applications in the true blue spectrum (450 nm). Topics include an overview of material growth by metal-organic chemical vapor deposition (MOCVD), waveguide design and processing techniques for improving device performance for multiple lateral mode and single lateral mode ridge waveguides.

Format:
Text
Collection(s):
UCSB electronic theses and dissertations
ARK:
ark:/13030/m5gh9jnf
Merritt ARK:
ark:/13030/m5gh9jnf
Rights:
Inc.icon only.dark In Copyright
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