Determination of optical gain and absorption of quantum dots with an improved segmented contact method

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

doi:10.1117/12.591241

28 April 2005 Determination of optical gain and absorption of quantum dots with an improved segmented contact method

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

Author Affiliations +

Proceedings Volume 5722, Physics and Simulation of Optoelectronic Devices XIII; (2005) https://doi.org/10.1117/12.591241
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

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.

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Y.-C. Xin, H. Su, L. F. Lester, L. Zhang, A. L. Gray, S. Luong, K. Sun, Z. Zou, T. Whittington, J. Zilko, and P. M. Varangis "Determination of optical gain and absorption of quantum dots with an improved segmented contact method", Proc. SPIE 5722, Physics and Simulation of Optoelectronic Devices XIII, (28 April 2005); https://doi.org/10.1117/12.591241

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