Abstract
Subwavelength resonators at FIR are presented and studied. The structures consist of 1D cavities formed between a metallized (silver) surface and a metamaterial surface comprising a periodic array of silver patches on a silver-backed silicon substrate. The concept derives from recent discoveries of artificial magnetic conductors (AMC). By studying the currents excited on the metamaterial surface by a normally incident plane wave, the nature of the emerging resonant phenomena and the physical mechanism underlying the AMC operation are investigated. Full wave simulations, based on finite element method and time-domain transmission line modelling technique, have been carried out to demonstrate the effective AMC boundary condition and prove the possibilities for subwavelength cavities. The quality factor of the resonant cavities is assessed as a function of the cavity profile. It is demonstrated that the quality factor drops to about 1/8 of the half-wavelength value for a ?/8 resonant cavity. © 2007 IOP Publishing Ltd.
Original language | English |
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Pages (from-to) | S355-S360 |
Number of pages | 6 |
Journal | Journal of Optics A: Pure and Applied Optics |
Volume | 9 |
Issue number | 9 |
DOIs | |
Publication status | Published - Sept 2007 |
Event | 1st European Topical Meeting on Nanophotonics and Metamaterials - Seefeld, Austria Duration: 8 Jan 2007 → 11 Jan 2007 |
Keywords
- quality factor
- artificial magnetic conductor
- infrared filter
- metamaterials
- resonant cavities
- surfaces
- antennas