DocumentCode :
1913682
Title :
Experimental demonstration of spectral non-reciprocity and unidirectionality in volumetric and printed magnetic photonic crystals
Author :
Sertel, Kubilay ; Zhang, Lanlin ; Apaydin, Nil ; Volakis, John L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA
fYear :
2011
fDate :
13-20 Aug. 2011
Firstpage :
1
Lastpage :
4
Abstract :
We present experimental confirmation of spectral non-reciprocity and unidirectional propagation in magnetic photonic crystals. The unique dispersion properties of such periodic anisotropic/magnetic media were also emulated on simpler printed structures. We outline two designs that exhibit non-reciprocal dispersion diagrams (i.e. ω(K) ≠ ω (-K)) in volumetric and printed magnetic photonic crystals. Due to spectral non-reciprocity, unidirectional propagation properties were experimentally observed. These designs can also be tuned such that a stationary inflection point is achieved within the first propagation band, where ω\´= ω"= ω"\´=0 (where ω\´=∂ω/∂K). This special mode is referred to as the “frozen mode” (i.e. zero group velocity). Correspondingly, a significantly longer group delay is observed in experiments. These measurements constitute the first experimental demonstration of the unique properties of the subject magnetic photonic crystals.
Keywords :
electromagnetic wave propagation; optical dispersion; photonic crystals; frozen mode; nonreciprocal dispersion; periodic anisotropic/magnetic media; printed magnetic photonic crystals; printed structures; propagation band; spectral nonreciprocity; unidirectional propagation properties; volumetric magnetic photonic crystals; zero group velocity; Dielectrics; Dispersion; Magnetic materials; Perpendicular magnetic anisotropy; Photonic crystals; Transmission line measurements;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
Type :
conf
DOI :
10.1109/URSIGASS.2011.6050643
Filename :
6050643
Link To Document :
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