Abstract
The intersubband plasma excitation spectrum of a multiwire superlattice with finite potential barrier height is investigated theoretically within the random phase approximation. In this we consider a semiconductor quantum-wire superlattice composed of one-dimensional wires periodically repeated in two perpendicular directions. We examine the role of tunneling associated with incomplete confinement of the electrons in regard to their collective behavior, particularly in conjunction with intersubband transitions. The weak tunneling of electrons between adjacent quantum wires is treated employing a tight-binding scheme to approximate the single-electron wavefunction. It is shown that the intersubband plasmon modes depend critically on the symmetry properties of the subband wavefunctions.
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