Slanted annular aperture arrays as enhanced-transmission metamaterials: Excitation of the plasmonic transverse electromagnetic guided mode

Abdoulaye Ndao (1) , Abderrahmane Belkhir (2) , Roland Salut (1) , Fadi Issam Baida (1)

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
2 LPCQ - Laboratoire de Physique et Chimie Quantique [Tizi-Ouzou]

We present here the fabrication and the optical characterization of slanted annular aperture arrays engraved into silver film. An experimental enhanced transmission based on the excitation of the cutoff-less plasmonic guided mode of the nano-waveguides (the transmission electron microscopy mode) is demonstrated and agrees well with the theoretical predicted results. By the way, even if it is less efficient (70% → 20%), an enhanced transmission can occur at larger wavelength value (720 nm-930 nm) compared to conventional annular aperture arrays structure by correctly setting the metal thickness.

Domaines: Optique / photonique; Optique [physics.optics]

Abdoulaye Ndao, Abderrahmane Belkhir, Roland Salut, Fadi Issam Baida. Slanted annular aperture arrays as enhanced-transmission metamaterials: Excitation of the plasmonic transverse electromagnetic guided mode. Applied Physics Letters, 2013, 103, pp.211901. ⟨10.1063/1.4832227⟩. ⟨hal-00924320⟩