The local temperature of quantum-cascade lasers operating in continuous wave mode is reported. This information is extracted from the thermal shift of the band-to-band photoluminescence peaks in the AlInAs and InP cladding layers of quantum-cascade laser facets using a high-resolution microprobe setup. Interpolation by means of a two-dimensional heat diffusion model allows to obtain the temperature profile and the thermal conductivity in the waveguide core. Comparison between substrate and epilayer-side mounted lasers shows the superior thermal dissipation capability of the latter, and explains their better performance with respect to threshold current and maximum operating temperature.

1.
J.
Faist
,
F.
Capasso
,
D. L.
Sivco
,
C.
Sirtori
,
A. L.
Hutchinson
, and
A. Y.
Cho
,
Science
264
,
553
(
1994
).
Google Scholar
 
2.
G.
Scamarcio
,
F.
Capasso
,
C.
Sirtori
,
J.
Faist
,
D. L.
Sivco
,
A. L.
Hutchinson
, and
A. Y.
Cho
,
Science
276
,
773
(
1997
).
Google Scholar
 
3.
F.
Capasso
,
A.
Tredicucci
,
C.
Gmachl
,
D. L.
Sivco
,
A. L.
Hutchinson
,
A. Y.
Cho
, and
G.
Scamarcio
,
IEEE J. Sel. Top. Quantum Electron.
5
,
792
(
1999
).
Google Scholar
 
4.
A.
Tredicucci
,
F.
Capasso
,
C.
Gmachl
,
D. L.
Sivco
,
A. L.
Hutchinson
, and
A. Y.
Cho
,
IEEE Photonics Technol. Lett.
12
,
260
(
2000
).
Google Scholar
 
5.
C.
Gmachl
,
F.
Capasso
,
A.
Tredicucci
,
D. L.
Sivco
,
R.
Köhler
,
A. L.
Hutchinson
, and
A. Y.
Cho
,
IEEE J. Sel. Top. Quantum Electron.
5
,
808
(
1999
).
Google Scholar
 
6.
C.
Gmachl
,
A.
Tredicucci
,
F.
Capasso
,
A. L.
Hutchinson
,
D. L.
Sivco
,
A. M.
Sergent
,
T.
Mentzel
, and
A. Y.
Cho
,
Electron. Lett.
23
,
723
(
2000
).
Google Scholar
 
7.
C.
Gmachl
,
A. M.
Sergent
,
A.
Tredicucci
,
F.
Capasso
,
A. L.
Hutchinson
,
D. L.
Sivco
,
J. N.
Baillargeon
,
S. N. G.
Chu
, and
A. Y.
Cho
,
IEEE Photonics Technol. Lett.
11
,
1369
(
1999
).
Google Scholar
 
8.
C.
Gmachl
,
F.
Capasso
,
R.
Köhler
,
A.
Tredicucci
,
A. L.
Hutchinson
,
D. L.
Sivco
,
J. N.
Baillargeon
, and
A. Y.
Cho
,
IEEE Circuits Devices
16
,
10
(
2000
).
Google Scholar
 
9.
D. C.
Hall
,
L.
Goldberg
, and
D.
Mehuys
,
Appl. Phys. Lett.
61
,
384
(
1992
).
Google Scholar
 
10.
R.
Schatz
and
C. G.
Bethea
,
J. Appl. Phys.
76
,
2509
(
1994
).
Google Scholar
 
11.
R.
Puchert
,
A.
Bärwolff
,
U.
Menzel
,
A.
Lau
,
M.
Voss
, and
T.
Elsaesser
,
J. Appl. Phys.
80
,
5559
(
1996
).
Google Scholar
 
12.
W. C.
Tang
,
H. J.
Rosen
,
P.
Vettiger
, and
D. J.
Webb
,
Appl. Phys. Lett.
58
,
557
(
1991
).
Google Scholar
 
13.
S. M.
Lee
,
D. G.
Cahill
, and
R.
Venkatasubramanian
,
Appl. Phys. Lett.
70
,
2957
(
1997
).
Google Scholar
 
14.
W. S.
Capinski
,
H. G.
Maris
,
T.
Ruf
,
M.
Cardona
,
K.
Ploog
, and
D. S.
Katzer
,
Phys. Rev. B
59
,
8105
(
1999
).
Google Scholar
 
15.
G.
Chen
,
Phys. Rev. B
57
,
14958
(
1998
).
Google Scholar
 
16.
Landolt-Börnstein Tables, edited by O. Madelung, M. Schultz, and H. Weiss (Springer, Berlin, 1982), Group III, Vol. 17a.
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