Direct comparison of optical properties and carrier dynamics of InGaN multiple quantum well (MQW) laser diode structures grown on pendeo epitaxial (PE)-GaN and sapphire substrates is reported. A strong increase in quantum efficiency and a dramatic reduction in stimulated emission threshold are observed for InGaN MQWs on PE-GaN substrates as compared to MQWs on sapphire substrates. Based on temperature-dependent time-resolved optical analysis, the authors find that a significant increase in nonradiative lifetime due to suppressed dislocation density plays an important role in enhancing optical properties of InGaN MQWs grown on PE-GaN substrates, resulting in radiative-process dominant emission even at room temperature.
REFERENCES
1.
N.
Gmeinwieser
, K.
Engl
, P.
Gottfriedsen
, U. T.
Schwarz
, J.
Zweck
, W.
Wegscheider
, S.
Miller
, H.-J.
Lugaur
, A.
Leber
, A.
Weimar
, A.
Lell
, and V.
Härle
, J. Appl. Phys.
96
, 3666
(2004
).2.
S.
Juršėnas
, E.
Kuokštis
, S.
Miasojedovas
, G.
Kurilčik
, A.
Žukauskas
, C. Q.
Chen
, J. W.
Yang
, V.
Adivarahan
, and M.
Asif Khan
, Appl. Phys. Lett.
85
, 771
(2004
).3.
X. A.
Cao
, J. M.
Teetsov
, M. P.
D’Evelyn
, D. W.
Merfeld
, and C. H.
Yan
, Appl. Phys. Lett.
85
, 7
(2004
).4.
O.
Nam
, M. D.
Bremser
, T. S.
Zheleva
, and R. F.
Davis
, Appl. Phys. Lett.
71
, 2638
(1997
).5.
O. H.
Nam
, K. H.
Ha
, J. S.
Kwak
, S. N.
Lee
, K. K.
Choi
, T. H.
Chang
, S. H.
Chae
, W. S.
Lee
, Y. J.
Sung
, H. S.
Paek
, J. H.
Chae
, T.
Sakong
, J. K.
Son
, H. Y.
Ryu
, Y. H.
Kim
, and Y.
Park
, Phys. Status Solidi A
201
, 2717
(2004
).6.
7.
H. S.
Paek
, T.
Sakong
, S. N.
Lee
, J. K.
Son
, H. Y.
Ryu
, O. H.
Nam
, and Y.
Park
, Physica B
376–377
, 499
(2006
).8.
Y.
Narukawa
, Y.
Kawakami
, S.
Fujita
, S.
Fujita
, and S.
Nakamura
, Phys. Rev. B
55
, R1938
(1997
).9.
A.
Yasan
, R.
McClintock
, K.
Mayes
, S. R.
Darvish
, H.
Zhang
, P.
Kung
, M.
Razeghi
, S. K.
Lee
, and J. Y.
Han
, Appl. Phys. Lett.
81
, 2151
(2002
).10.
S.
Miasojedovas
, S.
Jursenas
, A.
Zukauskas
, V. Yu.
Ivanov
, M.
Godlewski
, M.
Leszczynski
, P.
Perlin
, and T.
Suski
, J. Cryst. Growth
281
, 183
(2005
).11.
S. F.
Chichibu
, M.
Sugiyama
, T.
Onuma
, T.
Kitamura
, H.
Nakanishi
, T.
Kuroda
, A.
Tackeuchi
, T.
Sota
, Y.
Ishida
, and H.
Okumura
, Appl. Phys. Lett.
79
, 4319
(2001
).12.
Y. H.
Cho
G. H.
Gainer
, A. J.
Fischer
, J. J.
Song
, S.
Keller
, U. K.
Mishra
, and S. P.
Denbaars
, Appl. Phys. Lett.
73
, 1370
(1998
).© 2007 American Institute of Physics.
2007
American Institute of Physics
You do not currently have access to this content.