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A: Atomphysik
A 6: Spectroscopy
A 6.10: Vortrag
Dienstag, 3. April 2001, 18:00–18:15, H1028
Magnetoelectric spectrums of artificial atoms — •Eugene O. Kamenetskii 1, Arun Kumar Saha2, and Ikuo Awai2 — 1Department of Electrical and Computer Engineering, Ben Gurion University of the Negev, Beer Sheva, 84105, ISRAEL — 2Department of Electrical and Electronic Engineering, Yamaguchi University, Tokiwadai 2-16-1, Ube city 755-8611, JAPAN
A vast range of problems in condensed medium electrodynamics is due to different properties of atoms and material structures in natural media. New materials that exhibit novel electromagnetic properties and, therefore, may give a basis for new fundamental problems and unexpected applications are urgently on the agenda in modern electromagnetics. New effects principally different from those of natural materials can be expected in composite materials based on artificial atomic structures. The question about local coupling of electric and magnetic polarizations arises in problems of artificial chiral and bianisotropic media. Nevertheless, two small, i.e. quasistatic (with sizes much less than the electromagnetic wavelength) coupled electric and magnetic dipoles cannot be considered as point sources of the electromagnetic field. Such particles - the magnetoelectric (ME) particles - cannot be explainable in terms of the Maxwell description entirely and a quantum or semiclassical/quantized picture should be applied. Recently, one of the authors put forth an idea that small ferromagnetic (quasi-magnetostatic) resonators with special-form surface electrodes can be considered in microwaves as ME particles [1,2]. The experimental evidence for this ME effect in ferrite particles has been obtained recently by the authors [3,4]. Such artificial atoms are small dynamic structures with multiresonance spectrums of ME oscillations. These ME spectrums are characterized by energy eigenstates, angle momentums and spinning properties. The unified ME fields originated by point sources - the ME particles - can exist with the symmetry properties distinguished from that of the electromagnetic fields. These symmetry properties are characterized by the so-called CPT invariance. It is shown that the problem of the charge conjugation has to be considered in connection with a sign of energy eigenstates of ME oscillations in a particle [5]. In this paper we give the results of energy spectrum calculations and an analysis of spinning properties of ME oscillations in a ferrite disk resonator.
REFERENCES:
[1] E.O.Kamenetskii, Microw. Opt. Technol. Lett., 11(2), 103 (1996).
[2] E.O.Kamenetskii, Phys.Rev.E, 57, 3563 (1998).
[3] E.O.Kamenetskii, I.Awai, A.K.Saha, Microw. Opt. Technol. Lett., 24(1), 56 (2000).
[4] A.K., Saha, E.O.Kamenetskii, and I.Awai, Phys. Rev. E. (submitted).
[5] E.O. Kamenetskii, A.K. Saha, and I. Awai, Phys. Rev. Lett. (submitted).