Title :
Hybrid SRRs Design and Fabrication for Broadband Terahertz Metamaterials
Author :
Pan, Z.Y. ; Zhang, P. ; Chen, Z.C. ; Vienne, G. ; Hong, M.H.
Author_Institution :
Data Storage Inst., Agency for Sci., Technol. & Res. (A*STAR), Singapore, Singapore
Abstract :
Hybrid metamaterials comprising split-ring resonator (SRR) structures with different gap dimensions are fabricated on polyethylene naphthalate (PEN) films by parallel laser micro-lens array (MLA) lithography and a liftoff process. The unit cell of hybrid metamaterials consists of four SRRs with the same SRR core side length but different gap sizes. The different-gap-size SRRs in each unit cell correspond to different but successive resonance dips, which are coupled to form a significantly broader band with enhanced resonance. The hybrid SRRs design is numerically and experimentally demonstrated, showing a much broader bandwidth to cover all narrowband induced by each SRR and enhanced resonance as compared with a uniform SRR design.
Keywords :
laser materials processing; metamaterials; microlenses; optical design techniques; optical fabrication; optical films; optical resonators; photolithography; broadband terahertz metamaterials; hybrid metamaterials; hybrid split-ring resonator design; hybrid split-ring resonator fabrication; parallel laser micro-lens array lithography; polyethylene naphthalate films; Bandwidth; Broadband communication; Couplings; Films; Magnetic materials; Metamaterials; Resonant frequency; Hybrid split-ring resonators; broadband; terahertz metamaterials;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2012.2207711
