An ultrawide band quantum dot (QD) light emitting device (LED) with bandwidth of covering spectral range has been demonstrated by postfabrication laser-irradiation technique. The integrated light output of the QD LED was found to increase by four times after laser annealing, attributed to the improved homogeneity of the QDs and enhanced lateral electrical and optical confinements at the active region after intermixing. Large wavelength blueshift of has been obtained at the laser annealed region and an overall increase in bandwidth of 22% has been obtained in the QD LED after postfabrication laser annealing.
REFERENCES
1.
A. J.
Keating
and D. D.
Sampson
, J. Lightwave Technol.
15
, 53
(1997
).2.
S. J.
Park
, C. H.
Lee
, K. T.
Jeong
, H. J.
Park
, J. G.
Ahn
, and K. H.
Song
, J. Lightwave Technol.
22
, 2582
(2004
).3.
J. M.
Schmitt
, IEEE J. Sel. Top. Quantum Electron.
5
, 1205
(1999
).4.
C. F.
Lin
and B. L.
Lee
, Appl. Phys. Lett.
71
, 1598
(1997
).5.
C. E.
Dimas
, H. S.
Djie
, and B. S.
Ooi
, J. Cryst. Growth
288
, 153
(2006
).6.
L. H.
Li
, M.
Rossetti
, A.
Fiore
, L.
Occhi
, and C.
Velez
, Electron. Lett.
41
, 41
(2005
).7.
B. S.
Ooi
, K.
McIlvaney
, M. W.
Street
, A. S.
Helmy
, S. G.
Ayling
, A. C.
Bryce
, J. H.
Marsh
, and J. S.
Roberts
, IEEE J. Quantum Electron.
33
, 1784
(1997
).8.
C.
Dion
, P. J.
Poole
, S.
Raymond
, P.
Desjardins
, and F.
Schiettekatte
, Appl. Phys. Lett.
89
, 131905
(2006
).9.
V.
Aimez
, J.
Beauvais
, J.
Beerens
, D.
Morris
, H. S.
Lim
, and B. S.
Ooi
, IEEE J. Sel. Top. Quantum Electron.
8
, 870
(2002
).10.
S.
Barik
, H. H.
Tan
, and C.
Jagadish
, Appl. Phys. Lett.
88
, 223101
(2006
).11.
J. H.
Marsh
, S. A.
Bradshaw
, A. C.
Bryce
, R.
Gwilliam
, and R. W.
Glew
, J. Electron. Mater.
20
, 973
(1991
).12.
A.
McKee
, C. J.
McLean
, A. C.
Bryce
, R. M.
De La Rue
, J. H.
Marsh
, and C.
Button
, Appl. Phys. Lett.
65
, 2263
(1994
).13.
T. K.
Ong
, Y. W.
Chen
, B. S.
Ooi
, Y. L.
Lam
, and Y. C.
Chan
, Microelectron. Eng.
51-52
, 349
(2000
).14.
C. K.
Chia
, S. J.
Chua
, S.
Tripathy
, and J. R.
Dong
, Appl. Phys. Lett.
86
, 051905
(2005
).15.
C. K.
Chia
, J. R.
Dong
, S. J.
Chua
, and S.
Tripathy
, J. Cryst. Growth
288
, 57
(2006
).16.
H. S.
Djie
, O.
Gunawan
, D. N.
Wang
, B. S.
Ooi
, and J. C. M.
Hwang
, Phys. Rev. B
73
, 155324
(2006
).17.
S. D.
McDougall
, O. P.
Kowalski
, J. H.
Marsh
, and J. S.
Aitchison
, IEEE Photonics Technol. Lett.
11
, 1557
(1999
).18.
A.
McKee
, C. J.
McLean
, G.
Lullo
, A. C.
Bryce
, R. M.
De La Rue
, J. H.
Marsh
, and C. C.
Button
, IEEE J. Quantum Electron.
33
, 45
(1997
).19.
J. H.
Teng
, J. R.
Dong
, S. J.
Chua
, R.
Yin
, B. C.
Foo
, B. Z.
Wang
, and Y. J.
Wang
, Appl. Phys. Lett.
88
, 011109
(2006
).20.
E.
Dupont
, H. C.
Liu
, M.
Buchanan
, S.
Chiu
, and M.
Gao
, Appl. Phys. Lett.
76
, 4
(2000
).© 2007 American Institute of Physics.
2007
American Institute of Physics
You do not currently have access to this content.
