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Experimental demonstration of the origin of photonic bandgap creation and associated defect modes in microwave planar circuits

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Saib, Aimad [UCL] Platteborze, Robert [UCL] Huynen, Isabelle [UCL]

This paper presents an experimental demonstration of the origin of the Photonic bandgap, using a planar dielectric substrate with a ID finite array of rectangular holes. A microstrip of uniform width placed above the array show's a periodic variation of impedance and refractive index. The measured transmission factor of the line exhibits a strong bandgap. When the width of the microstrip periodically changes in order to keep a constant impedance along the array, the bandgap in the measured transmission totally disappears. This proves that the creation of bandgap is due to the periodic variation of impedances instead of refractive indexes. The effect of the presence of defects is also illustrated. (C) 2004 Wiley Periodicals. Inc.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2004
Language Anglais
Journal information "Microwave & Optical Technology Letters" - Vol. 41, no. 1, p. 5-9 (2004)
Peer reviewed yes
Publisher John Wiley & Sons Inc (Hoboken)
issn 0895-2477
e-issn 1098-2760
Publication status Publié
Affiliation UCL - FSA/ELEC - Département d'électricité
Keywords photonic bandgap ; impedance ; refractive index ; defect mode ; planar devices
Links
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Bibliographic reference Saib, Aimad ; Platteborze, Robert ; Huynen, Isabelle. Experimental demonstration of the origin of photonic bandgap creation and associated defect modes in microwave planar circuits. In: Microwave & Optical Technology Letters, Vol. 41, no. 1, p. 5-9 (2004)
Permanent URL http://hdl.handle.net/2078.1/40312