TY - JOUR
T1 - Collective cyclotron resonance of an inhomogeneous electron gas
AU - Ying, X.
AU - Karraï, K.
AU - Drew, H. D.
AU - Santos, M.
AU - Shayegan, M.
PY - 1992
Y1 - 1992
N2 - We report low-temperature far-infrared magneto-optical measurements on a remotely doped, asymmetric, wide parabolic AlxGa1-xAs quantum well with two curvatures. The collective cyclotron-resonance spectrum of the system, measured with an in-plane magnetic field, is found to depend on the electron areal density Ns. At sufficiently high Ns, so that the effective layer thickness is much larger than the magnetic length, two plasma frequencies associated with the two curvatures are observed, showing that the system behaves as a classical, inhomogeneous, three-dimensional electron plasma. At low Ns, only one resonance is observed, corresponding to the lowest optical transition between the quantized levels in the nearly empty well.
AB - We report low-temperature far-infrared magneto-optical measurements on a remotely doped, asymmetric, wide parabolic AlxGa1-xAs quantum well with two curvatures. The collective cyclotron-resonance spectrum of the system, measured with an in-plane magnetic field, is found to depend on the electron areal density Ns. At sufficiently high Ns, so that the effective layer thickness is much larger than the magnetic length, two plasma frequencies associated with the two curvatures are observed, showing that the system behaves as a classical, inhomogeneous, three-dimensional electron plasma. At low Ns, only one resonance is observed, corresponding to the lowest optical transition between the quantized levels in the nearly empty well.
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U2 - 10.1103/PhysRevB.46.1823
DO - 10.1103/PhysRevB.46.1823
M3 - Article
AN - SCOPUS:11544314244
SN - 0163-1829
VL - 46
SP - 1823
EP - 1826
JO - Physical Review B
JF - Physical Review B
IS - 3
ER -