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Linear Response Theory
2 other sections not shown
2DEG band gaps band index changes Brillouin zone collective modes confined plasmon continuity equation density-density response function depolarization shifts diagonal matrix electron density electronic system Eliasson energy units excitation energies external potential f-sum rule Fermi energy fermion Green's function Hawrylak I I I I I I I I I I I I I I I I I I I I I I I I Imaginary incoherent excitation intersubband excitations intersubband transitions J.J. Quinn J.P. Kotthaus KP bands KP subbands Kronig-Penney band structure Kronig-Penney model lateral structure lOOnm LS2DEG matrix elements microscopic calculations modulation potential strength modulation strength non-local corrections number of plane optical response partially occupied Phys plane waves plasmon excitations plasmon modes qualitatively quantum wires resonance frequencies Sarma semiclassical approximation semiclassical calculations semiclassical theory sharp density profile strong modulation subband is occupied subbands are partially various q wave function wave vector weak modulation width wn,k zero modulation