We present above-room-temperature operation of an injectorless quantum-cascade (QC) laser. The active region is designed as a four-level staircase and has been realized in the strain-compensated material system Ga0.4In0.6AsAl0.56In0.44As based on InP. In pulsed operation the lasers work up to a heat-sink temperature of 340K, the highest temperature achieved so far with injectorless QC lasers. A large wavelength shift is observed for higher bias fields and (therefore) at high temperatures (10μm at 77K and 8.4μm at 300K).

1.
J. S.
Yu
,
A.
Evans
,
J.
David
,
L.
Doris
,
S.
Slivken
, and
M.
Razeghi
,
IEEE Photonics Technol. Lett.
16
,
747
(
2004
).
2.
J.
Faist
,
D.
Hofstetter
,
M.
Beck
,
T.
Aellen
,
M.
Rochat
, and
S.
Blaser
,
IEEE J. Quantum Electron.
38
,
533
(
2002
).
3.
A.
Friedrich
,
G.
Scarpa
,
G.
Boehm
, and
M.-C.
Amann
,
Electron. Lett.
40
,
1416
(
2004
).
4.
B.
Knoll
and
F.
Keilmann
,
Nature (London)
399
,
134
(
1999
).
5.
P.
Werle
,
F.
Slemr
,
K.
Maurer
,
R.
Kormann
,
R.
Muecke
, and
B.
Jaenker
,
Opt. Lasers Eng.
37
,
101
(
2002
).
6.
S.
Blaser
,
D.
Hofstetter
,
M.
Beck
, and
J.
Faist
,
Electron. Lett.
37
,
778
(
2001
).
7.
G.
Scarpa
,
N.
Ulbrich
,
G.
Boehm
,
G.
Abstreiter
, and
M.-C.
Amann
,
IEEE Proc. IPRM
,
735
738
(
2002
).
8.
N.
Ulbrich
,
G.
Scarpa
,
G.
Boehm
,
G.
Abstreiter
, and
M.-C.
Amann
,
Appl. Phys. Lett.
80
,
4312
(
2002
).
9.
M.
Wanke
,
F.
Capasso
,
C.
Gmachl
,
A.
Tredicucci
,
D.
Sivco
,
A.
Hutchinson
,
G.
Chu
, and
A.
Cho
,
Appl. Phys. Lett.
78
,
3950
(
2001
).
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