title: Regular and anomalous extraordinary optical transmission at the THz-gap.
abstract: 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.
authors: Novosibirsk State University, Research-and-Education Centre Nanosystems and Modern Materials, 630090 Novosibirsk, Russia.
authors: S A
authors: SA
authors: Kuznetsov
authors: M
authors: M
authors: Navarro-Cía
authors: V V
authors: VV
authors: Kubarev
authors: A V
authors: AV
authors: Gelfand
authors: M
authors: M
authors: Beruete
authors: I
authors: I
authors: Campillo
authors: M
authors: M
authors: Sorolla
mesh_terms: D004867:Equipment Design; D005583:Fourier Analysis; D007259:Infrared Rays; D008670:Metals / Q000737:chemistry; D008872:Microwaves; D008962:Models, Theoretical; D011126:Polypropylenes / Q000737:chemistry*; D011827:Radiation; D012031:Refractometry; D012542:Scattering, Radiation; D012815:Signal Processing, Computer-Assisted; D020349:Surface Plasmon Resonance / Q000295:instrumentation* / Q000379:methods; D013499:Surface Properties; D055053:Terahertz Radiation
chemical_list: D008670:Metals; D011126:Polypropylenes