Lh. Wang et al., ANISOTROPIC SPECTRA OF MAGNETOPLASMONS IN WIDE PARABOLIC QUANTUM-WELLSYSTEMS, Physical review. B, Condensed matter, 47(24), 1993, pp. 16326-16332
Anisotropic intrasubband magnetoplasmons of an electron gas in a wide
parabolic quantum well are obtained by using a method within the frame
work of the random-phase approximation. The symmetries and shapes of t
he various perturbed Hartree potentials along the confining direction
at B=0 are found analytically. Anisotropy of the intrasubband modes in
the presence of a longitudinal magnetic field perpendicular to the co
nfinement direction is revealed and explained. We also make a striking
prediction that a strong longitudinal magnetic field can give rise to
an additional one-dimensional-like undamped intrasubband magnetoplasm
on mode which is well within the experimentally accessible range.