Alexandria Digital Research Library

Design, Growth and Fabrication of Nitride-based Semipolar (2021) Laser Diodes

Author:
Huang, Chia-Yen
Degree Grantor:
University of California, Santa Barbara. Materials
Degree Supervisor:
Shuji Nakamura
Place of Publication:
[Santa Barbara, Calif.]
Publisher:
University of California, Santa Barbara
Creation Date:
2012
Issued Date:
2012
Topics:
Engineering, Electronics and Electrical and Engineering, Materials Science
Keywords:
LED
Semipolar
Nitride
Laser diodes
Genres:
Dissertations, Academic and Online resources
Dissertation:
Ph.D.--University of California, Santa Barbara, 2012
Description:

Nonpolar and semipolar planes on wurtzite nitride have attracted much attention due to their eliminated and reduced polarization-related electric field in the quantum wells (QWs). Violet and blue nonpolar m-plane laser diodes (LDs) have been demonstrated under continuous wave operation. However, the operation in green spectral region has been limited due to low In incorporation and the formation of basal plane stacking faults on m-plane. With decent In incorporation on semipolar planes, high performance green light-emitting diodes (LEDs) and LDs have been demonstrated on (202¯1) plane. On the other hand, low efficiency droop and high optical polarization ratio were also observed on semipolar (202¯1¯) LEDs.

Index-guided ridge lasers with cleaved facets were fabricated. Polishing and dry-etching were applied on the backside surface after lapping to improve the contact characteristics. To suppress the morphologies, InGaN/GaN superlattices were used as guiding layers instead of conventional bulk InGaN layers. Semipolar (202¯1¯) laser diodes with lasing wavelength up to 505 nm were demonstrated with 4 nm blueshift between the spontaneous emission and lasing.

Physical Description:
1 online resource (161 pages)
Format:
Text
Collection(s):
UCSB electronic theses and dissertations
ARK:
ark:/48907/f3ng4nj2
ISBN:
9781267767578
Catalog System Number:
990039147560203776
Rights:
Inc.icon only.dark In Copyright
Copyright Holder:
Chia-Yen Huang
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