Mid-IR plasmonic antennas on silicon-rich oxinitride absorbing substrates: Nonlinear scaling of resonance wavelengths with antenna length - Sikola,T; Kekatpure,RD; Barnard,ES; White,JS; Van,Dorpe P; Brinek,L; Tomanec,O; Zlamal,J; Lei,DY; Sonnefraud,Y; Maier,SA; Humlicek,J; et al. (APPLIED PHYSICS LETTERS, 2009)