In this paper, we study the radiation from embedded sources in two-dimensional finite-size “photonic- quasicrystal” PQC slabs made of dielectric rods arranged according to a 12-fold symmetric aperiodic tiling. The results from our investigation, based on rigorous full-wave simulations, show the possibility of achieving broadside radiation at multiple frequencies, with high directivity ͑e.g., 15 dB͒ and low sidelobes ͑e.g., −12 dB͒. We also show that leaky waves are supported by a PQC slab and that the beamwidth is directly proportional to the leaky wave attenuation constant, which provides a physically incisive interpretation of the observed radiation characteristics.

Directive emission from defect-free dodecagonal photonic quasicrystals: A leaky-wave characterization

GALDI V;PIERRO V;
2009-01-01

Abstract

In this paper, we study the radiation from embedded sources in two-dimensional finite-size “photonic- quasicrystal” PQC slabs made of dielectric rods arranged according to a 12-fold symmetric aperiodic tiling. The results from our investigation, based on rigorous full-wave simulations, show the possibility of achieving broadside radiation at multiple frequencies, with high directivity ͑e.g., 15 dB͒ and low sidelobes ͑e.g., −12 dB͒. We also show that leaky waves are supported by a PQC slab and that the beamwidth is directly proportional to the leaky wave attenuation constant, which provides a physically incisive interpretation of the observed radiation characteristics.
2009
photonic bean gap; quasi crystal; leaky wave
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12070/2257
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