Publication detail
Mid-IR plasmonic antennas on silicon-rich oxinitride absorbing substrates: Nonlinear scaling of resonance wavelengths with antenna length
ŠIKOLA, T. KEKATPURE, R. BARNARD, E. WHITE, J. VAN DORPE, P. BŘÍNEK, L. TOMANEC, O. ZLÁMAL, J. LEI, D. SONNEFRAUD, Y. MAIER, S. HUMLÍČEK, J. BRONGERSMA, M.
English title
Mid-IR plasmonic antennas on silicon-rich oxinitride absorbing substrates: Nonlinear scaling of resonance wavelengths with antenna length
Type
Peer-reviewed article not indexed in WoS or Scopus
Language
en
Original abstract
We report on the resonant properties of platinum dipole antennas fabricated on a silicon-rich-oxinitride thin film that exhibits significant absorption in the mid-infrared of the electromagnetic spectrum (lambda-1 = 1100 cm-1). A nonlinear scaling between the resonant wavelength and the antenna length has been found and quantitatively confirmed by full-field electromagnetic simulations. The resonant wavelength increases linearly with antenna length for small lengths and tends to saturate for large ones length of 0.004 mm. This saturation effect is attributed to the coupling of a geometrical antenna resonance and an absorption resonance of the substrate material.
Keywords in English
dipole antennas; infrared spectra; plasmonics; platinum; silicon compounds; thin films
Released
2009-12-22
ISSN
0003-6951
Journal
Applied Physics Letters
Volume
95
Number
25
Pages from–to
253109-1–253109-3
Pages count
3