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http://dx.doi.org/10.3938/NPSM.68.1183

Optical Properties of Plasmons in a GaAs/AlxGa1-xAs Multiple Quantum Well Under Electric and Magnetic Fields  

Ahn, Hyung Soo (Department of Applied Physics, Korea Maritime University)
Lee, Sang Chil (Faculty of Science Education, Jeju National University)
Kim, Suck Whan (Department of Physics, Andong National University)
Publication Information
New Physics: Sae Mulli / v.68, no.11, 2018 , pp. 1183-1191 More about this Journal
Abstract
The plasmon behaviors in a superlattice of $GaAs/Al_xGa_{1-x}As$ multiple quantum wells with a half-parabolic confining potential due to different dielectric interfaces are studied under magnetic and electric fields perpendicular and parallel to the superlattice axis by using a previously published theoretical framework. From the density-density correlation functions by considering the intrasubband and the inter-subband transitions under the random phase approximation, we calculate the dispersion energies of the surface and the bulk states as functions of the composition of the multiple quantum well structure and of the magnetic field strength and the average electric field strength over the quantum well. The Raman intensities for various magnetic field strengths and average electric field strengths over the quantum well are also obtained as a function of the energy of the incoming light for these states.
Keywords
$GaAs/Al_xGa_{1-x}As$; Superlattice; Raman intensity; Plasmon; Dispersion relation; Random phase approximation; Density-density correlation function;
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