Regular and anomalous extraordinary optical transmission at the THz-gap.
In this paper Anomalous Extraordinary Transmission (ET) is reported for s-polarization of low loss doubly periodic subwavelength hole arrays patterned on polypropylene (PP) substrates by conventional contact photolithography at the so-called THz-gap (1-10 THz). The unexpected enhanced transmittance for s-polarization (i.e. without spoof plasmons) was previously numerically demonstrated in subwavelength slits arrays. However, subsequently no experimental work has been devoted to this unexpected Extraordinary Transmission neither in subwavelength slits nor in subwavelength holes. Here, numerical study and experimental results of the Anomalous ET and the symmetric and antisymmetric transmittance modes associated with the already well-known p-polarization ET are shown alongside a systematically analysis of the frequency peaks as a function of hole size for both incident polarizations.
|Title:||Regular and anomalous extraordinary optical transmission at the THz-gap.|
|Open access status:||An open access publication|
|Keywords:||Equipment Design, Fourier Analysis, Infrared Rays, Metals, Microwaves, Models, Theoretical, Polypropylenes, Radiation, Refractometry, Scattering, Radiation, Signal Processing, Computer-Assisted, Surface Plasmon Resonance, Surface Properties, Terahertz Radiation|
|UCL classification:||UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Engineering Science
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