The interaction between point defects in the matrix and excitons localized in self-organized InGaAs/GaAs quantum dots is investigated for structures irradiated by protons. The exciton ground state is demonstrated to be unaffected by radiation doses up to The close proximity of radiation-induced defects leads to a strong nonmonotonous temperature dependence of the luminescence yield: Carriers are lost via tunneling from excited quantum dot states to irradiation-induced defects below ∼100 K, whereas at higher temperatures, carriers escape to the barrier and are captured by defects.
REFERENCES
1.
D. Bimberg, M. Grundmann, and N. N. Ledentsov, Quantum Dot Heterostructures, (Wiley, Chichester, 1999).
2.
3.
J. C.
Campbell
, D. L.
Huffaker
, H.
Deng
, and D. G.
Deppe
, Electron. Lett.
33
, 1337
(1997
).4.
H. C.
Liu
, M.
Gao
, J.
McCaffrey
, Z. R.
Wasilewski
, and S.
Fafard
, Appl. Phys. Lett.
78
, 79
(2001
).5.
H.
Pettersson
, L.
Baath
, N.
Carlsson
, W.
Seifert
, and L.
Samuelson
, Appl. Phys. Lett.
79
, 78
(2001
).6.
J. J.
Finley
, M.
Skalitz
, M.
Arzberger
, A.
Zrenner
, G.
Böhm
, and G.
Abstreiter
, Appl. Phys. Lett.
73
, 2618
(1998
).7.
R.
Heitz
, M.
Veit
, N. N.
Ledentsov
, A.
Hoffmann
, D.
Bimberg
, V. M.
Ustinov
, P. S.
Kop’ev
, and Z. I.
Alferov
, Phys. Rev. B
56
, 10435
(1997
).8.
9.
P.
Krispin
, J.-L.
Lazzari
, and H.
Kostial
, J. Appl. Phys.
84
, 6135
(1998
).10.
C.
Walther
, J.
Bollmann
, H.
Kissel
, H.
Kirmse
, W.
Neumann
, and W. T.
Masselink
, Appl. Phys. Lett.
76
, 2916
(2000
).11.
D.
Stievenard
, X.
Boddaert
, and J. C.
Bourgoin
, Phys. Rev. B
34
, 4048
(1986
).12.
H. H.
Tan
, J. S.
Williams
, and C.
Jagadish
, J. Appl. Phys.
78
, 1481
(1995
).13.
C. V.
Reddy
, S.
Fung
, and C. D.
Beling
, Phys. Rev. B
54
, 11290
(1996
).14.
R.
Leon
, G. M.
Swift
, B.
Magness
, W. A.
Taylor
, Y. S.
Tang
, K. L.
Wang
, P.
Dowd
, and Y. H.
Zhang
, Appl. Phys. Lett.
76
, 2074
(2000
).15.
N. A.
Sobolev
, A.
Cavaco
, M. C.
Carmo
, M.
Grundmann
, F.
Heinrichsdorff
, and D.
Bimberg
, Phys. Status Solidi B
224
, 93
(2001
).16.
C.
Ribbat
, R.
Sellin
, M.
Grundmann
, D.
Bimberg
, N. A.
Sobolev
, and M. C.
Carmo
, Electron. Lett.
37
, (2001
).17.
F. Heinrichsdorff, MOCVD Growth and Laser Applications of In(Ga)/As/GaAs Quantum Dots (Mensch and Buch, Berlin, 1998).
18.
F.
Guffarth
, R.
Heitz
, A.
Schliwa
, O.
Stier
, N. N.
Ledentsov
, A. R.
Kovsh
, V. M.
Ustinov
, and D.
Bimberg
, Phys. Rev. B
64
, 085305
(2001
).19.
C. M. A.
Kapteyn
, F.
Heinrichsdorff
, O.
Stier
, R.
Heitz
, M.
Grundmann
, N. D.
Zakharov
, D.
Bimberg
, and P.
Werner
, Phys. Rev. B
60
, 14265
(1999
).20.
R.
Heitz
, H.
Born
, F.
Guffarth
, O.
Stier
, A.
Schliwa
, A.
Hoffmann
, and D.
Bimberg
, Phys. Rev. B
64
, 241305
(R) (2001
).21.
F. Guffarth, R. Heitz, A. Schliwa, O. Stier, M. Geller, C. M. A. Kapteyn, R. Sellin, and D. Bimberg (unpublished).
This content is only available via PDF.
© 2003 American Institute of Physics.
2003
American Institute of Physics
You do not currently have access to this content.
