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Proceedings Paper

Determination of optical gain and absorption of quantum dots with an improved segmented contact method
Author(s): Y.-C. Xin; H. Su; L. F. Lester; L. Zhang; A. L. Gray; S. Luong; K. Sun; Z. Zou; T. Whittington; J. Zilko; P. M. Varangis
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Paper Abstract

For understanding the fundamental processes in QDs and optimizing the design of QD optical devices, it is essential to obtain accurate optical gain and absorption spectra. An improved segmented-contact method is described that subtracts the unguided spontaneous emission that normally introduces error into the calculated gain and absorption. Using the technique a QD gain spectrum is measured to an accuracy of less than 0.2/cm at nominal gain values below 2/cm. This capability also enables precise measurement of waveguide internal loss, unamplified spontaneous emission spectra and Stark shift data.

Paper Details

Date Published: 28 April 2005
PDF: 11 pages
Proc. SPIE 5722, Physics and Simulation of Optoelectronic Devices XIII, (28 April 2005); doi: 10.1117/12.591241
Show Author Affiliations
Y.-C. Xin, CHTM/Univ. of New Mexico (United States)
H. Su, CHTM/Univ. of New Mexico (United States)
L. F. Lester, CHTM/Univ. of New Mexico (United States)
L. Zhang, Zia Laser, Inc. (United States)
A. L. Gray, Zia Laser, Inc. (United States)
S. Luong, Zia Laser, Inc. (United States)
K. Sun, Zia Laser, Inc. (United States)
Z. Zou, Zia Laser, Inc. (United States)
T. Whittington, Zia Laser, Inc. (United States)
J. Zilko, Zia Laser, Inc. (United States)
P. M. Varangis, Zia Laser, Inc. (United States)


Published in SPIE Proceedings Vol. 5722:
Physics and Simulation of Optoelectronic Devices XIII
Marek Osinski; Fritz Henneberger; Hiroshi Amano, Editor(s)

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