Simulation of artificial magnetic materials using lattices of loaded molecules

James T. Aberle; David A. Buchanan; William E. McKinzie III

doi:10.1117/12.370162

12 November 1999 Simulation of artificial magnetic materials using lattices of loaded molecules

James T. Aberle, David A. Buchanan, William E. McKinzie III

Proceedings Volume 3795, Terahertz and Gigahertz Photonics; (1999) https://doi.org/10.1117/12.370162
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Present are numerical studies of the magnetic permeability for arrays of artificial magnetic molecules simulated using a time domain TLM code. These artificial magnetic materials consist of a 3D periodic lattice of electrically small loaded loops suspended in a non-magnetic host medium. For this class of artificial magnetic media, we demonstrate good agreement between the permeability computed using a simple circuit theory model, and that computed using a full wave TLM simulation. This close agreement suggests that the salient physics for this type of artificial magnetic media may be well modeled using simple lumped equivalent circuits. A closed form expression is derived for the effective media permeability as a function of the molecular circuit loads. When molecules are uniformly loaded with lossless capacitors, the artificial media exhibits a Lorentzian response with a resonance ((mu) _r yields (infinity) ) below which the media is paramagnetic ((mu) _r > 1) and above which the media is diamagnetic ((mu) _r < 1). Resonant frequency, and magnetic permeability, can be adjusted by controlling the load capacitance.

Citation Download Citation

James T. Aberle, David A. Buchanan, and William E. McKinzie III "Simulation of artificial magnetic materials using lattices of loaded molecules", Proc. SPIE 3795, Terahertz and Gigahertz Photonics, (12 November 1999); https://doi.org/10.1117/12.370162

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