Hedgehog subwavelength hole arrays: control over the THz enhanced transmission

M Navarro-Cía, Pablo Rodriguez-Ulibarri, M Beruete
2013 New Journal of Physics  
By backing or sandwiching a holey metal layer with or between isotropic dielectric slabs, additional peaks of transmission within the longwavelength regime arise as a result of the induced transverse magnetic (TM) or transverse electric (TE) grounded dielectric modes. A similar control of the complex surface wave modes, and thus of the extraordinary transmission (ET) peaks, is demonstrated here via anisotropic slabs in the form of a fakir's bed of nails. However, it is shown that those ET peaks
more » ... that those ET peaks formed from TE modes are suppressed because of the inherent dispersion characteristics of the free-standing grounded pins. This allows the red-shifting of the ET for the polarization parallel to the larger in-plane period of the hole array, but unlike the dielectric isotropic slab configuration, the orthogonal polarization remains inhibited.
doi:10.1088/1367-2630/15/1/013003 fatcat:ev2k743iz5brhduisfj6yf4rum