TY - JOUR
T1 - Terahertz Dipole Nanoantenna Arrays
T2 - Resonance Characteristics
AU - Razzari, Luca
AU - Toma, Andrea
AU - Clerici, Matteo
AU - Shalaby, Mostafa
AU - Das, Gobind
AU - Liberale, Carlo
AU - Chirumamilla, Manohar
AU - Zaccaria, Remo Proietti
AU - De Angelis, Francesco
AU - Peccianti, Marco
AU - Morandotti, Roberto
AU - Di Fabrizio, Enzo
N1 - Funding Information:
Acknowledgments The authors gratefully acknowledge the support from European Projects SMD FP7 no. CP-FP 229375-2; Nanoantenna FP7 no. 241818; and FOCUS FP7 no. 270483.
PY - 2013/3
Y1 - 2013/3
N2 - Resonant dipole nanoantennas promise to considerably improve the capabilities of terahertz spectroscopy, offering the possibility of increasing its sensitivity through local field enhancement, while in principle allowing unprecedented spatial resolutions, well below the diffraction limit. Here, we investigate the resonance properties of ordered arrays of terahertz dipole nanoantennas, both experimentally and through numerical simulations. We demonstrate the tunability of this type of structures, in a range (~1-2 THz) that is particularly interesting and accessible by means of standard zinc telluride sources. We additionally study the near-field resonance properties of the arrays, finding that the resonance shift observed between near-field and far-field spectra is predominantly ascribable to ohmic damping.
AB - Resonant dipole nanoantennas promise to considerably improve the capabilities of terahertz spectroscopy, offering the possibility of increasing its sensitivity through local field enhancement, while in principle allowing unprecedented spatial resolutions, well below the diffraction limit. Here, we investigate the resonance properties of ordered arrays of terahertz dipole nanoantennas, both experimentally and through numerical simulations. We demonstrate the tunability of this type of structures, in a range (~1-2 THz) that is particularly interesting and accessible by means of standard zinc telluride sources. We additionally study the near-field resonance properties of the arrays, finding that the resonance shift observed between near-field and far-field spectra is predominantly ascribable to ohmic damping.
KW - Nanophotonics
KW - Nanostructure fabrication
KW - Plasmonics
KW - Terahertz spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=84874977815&partnerID=8YFLogxK
U2 - 10.1007/s11468-012-9439-0
DO - 10.1007/s11468-012-9439-0
M3 - Article
C2 - 23504505
AN - SCOPUS:84874977815
SN - 1557-1955
VL - 8
SP - 133
EP - 138
JO - Plasmonics
JF - Plasmonics
IS - 1
ER -