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Wave vector dispersion of excitations of the two-dimensional electron gas from light scattering using a grating coupler

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Goñi,  A. R.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Grambow,  P.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons279906

Eberl,  K.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Kristukat, C., Goñi, A. R., Grambow, P., Eberl, K., & Thomsen, C. (2002). Wave vector dispersion of excitations of the two-dimensional electron gas from light scattering using a grating coupler. Physica E, 13(2-4), 341-344.


Cite as: https://hdl.handle.net/21.11116/0000-000E-E2DD-A
Abstract
We determined the wave vector dispersion of elementary
excitations of the two-dimensional electron gas (2DEG) like
plasmons and intersubband excitations of the charge (CDE) and
spin density (SDE) by inelastic light scattering using a
grating coupler. The 2DEG forms in a modulation-doped
AlGaAs/GaAs single quantum well sample on top of which we
evaporated a metallic grating. In this way, in backscattering
geometry with incident light perpendicular to the plane of the
2DEG, light can couple to elementary excitations with finite
wave vectors in the range from 10(4) to 10(6) cm(-1). (C) 2002
Elsevier Science B.V. All rights reserved.