Plasma oscillations in quasi-classical dots

Abstract

We discuss anti-crossing of magneto-plasmon modes in a square lattice of electron dots observed by Demel et al. [Phys. Rev. Lett. 64 (1990) 780]. The magneto-plasmon spectrum in the vicinity of the intersection point is obtained using a perturbation theory based on the theory of plasmon resonance eigenfrequencies in the quasi-classical dot with a parabolic confining potential.