Continuous-wave blue semipolar III-nitride laser diodes were fabricated with highly vertical, smooth, and uniform mirror facets produced by chemically assisted ion beam etching. Uniform mirror facets are a requirement for accurate experimental determination of internal laser parameters, including internal loss and injection efficiency, which were determined to be 9 cm−1 and 73%, respectively, using the cavity length dependent method. The cavity length of the uncoated devices was varied from 900 μm to 1800 μm, with threshold current densities ranging from 3 kA/cm2 to 9 kA/cm2 and threshold voltages ranging from 5.5 V to 7 V. The experimentally determined internal loss was found to be in good agreement with a calculated value of 9.5 cm−1 using a 1D mode solver. The loss in each layer was calculated and in light of the analysis several modifications to the laser design are proposed.
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29 February 2016
Research Article|
March 02 2016
Measurement and analysis of internal loss and injection efficiency for continuous-wave blue semipolar III-nitride laser diodes with chemically assisted ion beam etched facets
Daniel L. Becerra
;
Daniel L. Becerra
a)
1Materials Department,
University of California
, Santa Barbara, California 93106, USA
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Leah Y. Kuritzky;
Leah Y. Kuritzky
1Materials Department,
University of California
, Santa Barbara, California 93106, USA
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Joseph Nedy;
Joseph Nedy
2Department of Electrical and Computer Engineering,
University of California
, Santa Barbara, California 93106, USA
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Arwa Saud Abbas;
Arwa Saud Abbas
1Materials Department,
University of California
, Santa Barbara, California 93106, USA
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Arash Pourhashemi;
Arash Pourhashemi
1Materials Department,
University of California
, Santa Barbara, California 93106, USA
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Robert M. Farrell;
Robert M. Farrell
1Materials Department,
University of California
, Santa Barbara, California 93106, USA
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Daniel A. Cohen;
Daniel A. Cohen
1Materials Department,
University of California
, Santa Barbara, California 93106, USA
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Steven P. DenBaars;
Steven P. DenBaars
1Materials Department,
University of California
, Santa Barbara, California 93106, USA
2Department of Electrical and Computer Engineering,
University of California
, Santa Barbara, California 93106, USA
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James S. Speck;
James S. Speck
1Materials Department,
University of California
, Santa Barbara, California 93106, USA
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Shuji Nakamura
Shuji Nakamura
1Materials Department,
University of California
, Santa Barbara, California 93106, USA
2Department of Electrical and Computer Engineering,
University of California
, Santa Barbara, California 93106, USA
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]
Appl. Phys. Lett. 108, 091106 (2016)
Article history
Received:
January 04 2016
Accepted:
February 20 2016
Citation
Daniel L. Becerra, Leah Y. Kuritzky, Joseph Nedy, Arwa Saud Abbas, Arash Pourhashemi, Robert M. Farrell, Daniel A. Cohen, Steven P. DenBaars, James S. Speck, Shuji Nakamura; Measurement and analysis of internal loss and injection efficiency for continuous-wave blue semipolar III-nitride laser diodes with chemically assisted ion beam etched facets. Appl. Phys. Lett. 29 February 2016; 108 (9): 091106. https://doi.org/10.1063/1.4943143
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