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Optical Study of Carrier Transfer in Strain-induced Quantum Dots

Published online by Cambridge University Press:  10 February 2011

Yitong Gu ,
M. D. Sturge ,
K. Kash ,
B. P. Van der Gaag ,
A. S. Gozdz ,
L. T. Florez  and
J. P. Harbison
Yitong Gu
Affiliation:
Department of Physics, Dartmouth College, Hanover, NH 03755-3528 U.S.A.
M. D. Sturge
Affiliation:
Department of Physics, Dartmouth College, Hanover, NH 03755-3528 U.S.A.
K. Kash
Affiliation:
Physics Department, Case Western Reserve University, Cleveland, OH 44106, U.S.A.
B. P. Van der Gaag
Affiliation:
Bellcore, 331 Newman Springs Road, Red Bank, NJ 07701-7040, U.S.A. ABST
A. S. Gozdz
Affiliation:
Bellcore, 331 Newman Springs Road, Red Bank, NJ 07701-7040, U.S.A. ABST
L. T. Florez
Affiliation:
Bellcore, 331 Newman Springs Road, Red Bank, NJ 07701-7040, U.S.A. ABST
J. P. Harbison
Affiliation:
Bellcore, 331 Newman Springs Road, Red Bank, NJ 07701-7040, U.S.A. ABST
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Abstract

We have studied excitation transfer from the host quantum well to strain-confined quantum dots. We find that there is a long-lived intermediate state acting as a reservoir, holding the excitation before it is thermally activated over a barrier to reach the quantum dot. The barrier height increases monotonically with dot size.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 417: Symposium EE – Optoelectronic Materials-Ordering, Composition Modulation, and Self-Assembled … , 1995 , 159
Copyright
Copyright © Materials Research Society 1996

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References

[1] See e.g., Kash, K., Bhat, R., Mahoney, Derek D., Lin, P.S.D., Scherer, A., Worlock, J.M., Gaag, B.P.Van der, Koza, M. and Grabbe, P., Appl.Phys.Lett.. 55, 681, (1989).Google Scholar
[2] Zhang, Yong, Sturge, M. D., Kash, K., Van der Gaag, B. P., Gozdz, A. S., Florez, L. T. and Harbison, J. P., Phys.Rev. B51, 13303, (1995)Google Scholar
[3] Zhang, Yong, Sturge, M. D., Kash, K., Gaag, B. P. Van der, Gozdz, A. S., Florez, L. T. and Harbison, J. P., Superlattices and Microstructures 17, 201, (1995).Google Scholar
[4] Zhang, Yong, Ph.D. Thesis, Dartmouth College, 1994.Google Scholar
[5] Zhang, Yong, Phys. Rev. B49, 14352 (1994)Google Scholar
[6] Citrin, D.S, Superlattices and Microstructures 13, 303 (1993)Google Scholar
[7] Gu, Yitong, Sturge, M.D., Kash, K., Gaag, B.P. Van der, Gozdz, A.S., Florez, L.T. and Harbison, J.P., Superlattices and Microstructures, in press.Google Scholar