We investigate the optical properties of InAs self-assembled quantum dots grown on (N11)A/B GaAs substrates, by means of cw photoluminescence under different excitation power densities. We observe a sizeable blue-shift of photoluminescence band induced by increasing the photogenerated carrier density. The shift depends on the substrate orientation and exhibits a strong asymmetric dependence on the substrate termination. We attribute the photoluminescence blue-shift to a reverse quantum confined Stark shift of ground state transition energies in the quantum dots. This effect arises from the photogenerated charge screening of the built-in piezoelectric field present in such strained structures grown on high index planes.

1.
K.
Chang
and
J.-B.
Xia
,
Solid State Commun.
104
,
351
(
1997
).
2.
F.
Widmann
,
J.
Simon
,
B.
Daudin
,
G.
Feuillet
,
J.
Rouviere
,
N.
Pelekanos
, and
G.
Fishman
,
Phys. Rev. B
58
,
R15989
(
1998
).
3.
S.
Raymond
,
J.
Reynolds
,
J.
Merz
,
S.
Fafard
,
Y.
Feng
, and
S.
Charbonneau
,
Phys. Rev. B
58
,
R13415
(
1998
).
4.
P.
Fry
,
I.
Itskevich
,
D.
Mowbray
,
M.
Skolnick
,
J.
Finley
,
J.
Barker
,
E.
O’Reilly
,
L.
Wilson
,
I.
Larkin
,
P.
Maksyn
,
M.
Hopkinson
,
M.
Al-Khafaji
,
J.
David
,
A.
Cullis
,
G.
Hill
, and
J.
Clark
,
Phys. Rev. Lett.
84
,
733
(
2000
).
5.
D.
Miller
,
D.
Chemela
,
T.
Damen
,
A.
Gossard
,
W.
Wiegmann
,
T.
Wood
, and
C.
Burrus
,
Phys. Rev. B
32
,
1043
(
1985
).
6.
P.
Boring
,
B.
Gil
, and
K.
Moore
,
Phys. Rev. Lett.
71
,
1875
(
1993
).
7.
P.
Vaccaro
,
K.
Tominaga
,
M.
Hosoda
,
K.
Fujita
, and
T.
Watanabe
,
Jpn. J. Appl. Phys., Part 1
34
,
1362
(
1995
).
8.
P.
Vaccaro
,
M.
Takahashi
,
K.
Fuhita
, and
T.
Watanabe
,
Jpn. J. Appl. Phys., Part 2
34
,
L13
(
1995
).
9.
S.
Fortina
,
S.
Sanguinetti
,
E.
Grilli
,
M.
Guzzi
,
M.
Henini
,
A.
Polimeni
, and
L.
Eaves
,
J. Cryst. Growth
187
,
126
(
1998
).
10.
P.
Vaccaro
,
M.
Hosoda
,
K.
Fujita
, and
T.
Watanabe
,
Jpn. J. Appl. Phys., Part 1
35
,
1292
(
1996
).
11.
D.
Smith
and
C.
Mailhiot
,
J. Appl. Phys.
63
,
2717
(
1988
).
12.
L.
DeCaro
and
L.
Tapfer
,
Phys. Rev. B
48
,
2298
(
1993
).
13.
P. Bhattacharya, Properties of Lattice-Matched and Strained Indium Gallium Arsenide (INSPEC, Stevenage, UK, 1993).
14.
M.
Grundmann
,
O.
Stier
, and
D.
Bimberg
,
Phys. Rev. B
52
,
11969
(
1995
).
15.
P.
Joyce
,
T.
Krzyzewski
,
G.
Bell
,
B.
Joyce
, and
T.
Jones
,
Phys. Rev. B
58
,
15981
(
1998
).
This content is only available via PDF.
You do not currently have access to this content.