Metamaterial Devices Rubaiyat Islam The Edward S. Rogers Sr. Dept. of Electrical & Computer Engineering, University of Toronto, Toronto, ON

Introduction Shelby, Smith Science (April 2001) Boeing Physics Today (June 2004) Parker, Charlton Physics Web (Aug 2000) Metamaterial/Photonic Crystal: Artificial medium tailored for specific Electromagnetic properties by periodically altering the composition of a host dielectric.

Introduction Negative-Refractive-Index (NRI) Metamaterials. E H k S E H k S  > 0,  > 0  < 0,  < 0 (Right-handed) (Left-handed)  > 0  > 0 d  < 0  < 0

Metamaterial Devices mm 8.70 mm Compact phase shifters Inter-digital capacitor Plated via to ground Compact Branchline Coupler 72 % size reduction

Metamaterial Devices 3dB coupler prototype High Coupling edge-coupled coupler (3dB Power splitter implementation) High Directivity (over 40 dB) and high isolation (over 70 dB) coupler

MS/NRI balun for microstrip to coplanar strip transition Leaky wave backfire antenna (Grbic 2002) Compact Low profile antenna with vertical polarization (Qureshi, Antoniades 2005)

Sub-diffraction imaging microwave Lens (Grbic 2003) Broadband, zero degree phase, power divider (Antoniades 2005)

Summary 1.Theory of Negative-Refractive-Index material synthesis, experimental verification and device fabrication/testing 2.Ongoing work: Frequency selective surfaces, plasmonic metamaterials and waveguides, superluminal pulse propagation, electronically tunable phase shifters … etc 3.Future work: Compact low-loss highly selective filters, compact diplexer, evanescent wave filter … etc