IEEE Photonics Journal 4(5), 1267 – 1272, (2012)Data Storage Inst., Agency for Sci., Technol. & Res. (A*STAR), Singapore, Singapore
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.
......The pitch p of the samples is defined by the pitch size of the MLA, which is fixed at 100 m. The sample characterization is carried out with a THz time-domain spectroscopy (THz-TDS) system (TPS3000, Teraview Inc.) in ..
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