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Optical properties of plasmons in a GaAs/Al$_x$Ga$_{1-x}$As multiple quantum well under electric and magnetic fields
New Phys.: Sae Mulli
Published online October 4, 2018;  
© 2018 New Physics: Sae Mulli.

Hyung Soo AHN*, Sang Chil LEE, Suck Whan KIM*
Received September 11, 2018; Revised October 1, 2018; Accepted October 1, 2018.
Abstract
The plasmon behaviors in a superlattice of GaAs/Al$_x$Ga$_{1-x}$As multiple quantum wells with a half-parabolic confining potential by different dielectric interfaces are studied under magnetic and electric fields perpendicular and parallel to the superlattice axis, respectively, by using a previous theoretical framework. From the density-density correlation functions considering the intrasubband and inter-subband transitions under random phase approximation, the dispersion energies of the surface and bulk states are calculated as a function of composition, magnetic field strength, and 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 incoming light energy for these states.


October 2018, 68 (10)
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