We propose and demonstrate a novel concept for intersubband detectors at operating wavelengths of 3–5 μm using GaAs quantum wells. An extremely large intersubband spacing is obtained by using ultrathin AlAs barriers on either side of the GaAs quantum wells followed by a thicker Al0.3Ga0.7As layer. Simultaneously, the confining AlAs layers act as tunnel barriers which allow an electrical detection of the intersubband excitation.
REFERENCES
1.
B. F.
Levine
, A. Y.
Cho
, J.
Walker
, R. J.
Malik
, D. A.
Kleinman
, and D. L.
Sivco
, Appl. Phys. Lett.
52
, 1481
(1988
).2.
B. F.
Irvine
, C. G.
Bethea
, G.
Hasnain
, J.
Walker
, and R. J.
Malik
, Appl. Phys. Lett.
53
, 296
(1988
).3.
E.
Pelve
, F.
Beltram
, C. G.
Bethea
, B. F.
Levine
, V. O.
Shen
, S. J.
Hsieh
, and R. R.
Abbott
, J. Appl. Phys.
66
, 5656
(1989
).4.
G.
Hasnain
, B. F.
Levine
, D. L.
Siveo
, and A. V.
Cho
, Appl. Phys. Lett.
56
, 770
(1990
).5.
A.
Kastalsky
, T.
Duffield
, S. J.
Allen
, and J.
Harbison
, Appl. Phys. Lett.
52
, 1320
(1988
).6.
7.
8.
H.
Schneider
, K. v.
Klitzing
, and K.
Ploog
, Superlatt. Microstruct.
5
, 383
(1989
).9.
M.
Ramsteiner
, J. D.
Ralston
, P.
Koidl
, B.
Dischler
, H.
Biebl
, J.
Wagner
, and H.
Ennen
, J. Appl. Phys.
67
, 3900
(1990
).10.
J.
Feldraann
, J.
Nunnenkamp
, O.
Peter
, E.
Gobel
, J.
Kuhl
, K.
Ploog
, P.
Dawson
, and C. T.
Foxon
, Phys. Rev. B
42
, 5809
(1990
).11.
12.
B. Dischler, J. D. Ralston, P. Koidl, P. Hiesinger, M. Ramsteiner, and M. Maler, Mater. Res. Soc. Symp. Proc. Boston, 1990 (to be published).
13.
H. T.
Grahn
, H.
Schneider
, W. W.
Rühle
, K. v.
Klitzing.
and K.
Ploog
, Phys. Rev. Lett.
64
, 2426
(1990
).14.
S.
Collins
, D.
Lowe
, and J. R.
Barker
, J. Phys. C: Solid State Phys.
20
, 6233
(1987
).15.
M.
Tsuchiya
, T.
Matsusue
, and H.
Sakaki
, Phys. Rev. Lett.
59
, 2356
(1987
).16.
E. L. Wolf, Principles of Electron Tunneling Spectroscopy (Oxford University, New York, 1985).
This content is only available via PDF.
© 1991 American Institute of Physics.
1991
American Institute of Physics
You do not currently have access to this content.