TY - JOUR
T1 - Extremely large extinction efficiency and field enhancement in terahertz resonant dipole nanoantennas
AU - Razzari, Luca
AU - Toma, Andrea
AU - Shalaby, Mostafa
AU - Clerici, Matteo
AU - Zaccaria, Remo Proietti
AU - Liberale, Carlo
AU - Marras, Sergio
AU - Al-Naib, Ibraheem A.I.
AU - Das, Gobind
AU - De Angelis, Francesco
AU - Peccianti, Marco
AU - Falqui, Andrea
AU - Ozaki, Tsuneyuki
AU - Morandotti, Roberto
AU - Di Fabrizio, Enzo
PY - 2011/12/19
Y1 - 2011/12/19
N2 - The distinctive ability of nanometallic structures to manipulate light at the nanoscale has recently promoted their use for a spectacular set of applications in a wide range of areas of research including artificial optical materials, nano-imaging, biosensing, and nonlinear optics. Here we transfer this concept to the terahertz spectral region, demonstrating a metal nanostructure in shape of a dipole nanoantenna, which can efficiently resonate at terahertz frequencies, showing an effective cross section >100 times larger than its geometrical area, and a field enhancement factor of ∼280, confined on a lateral section of ∼λ/1,000. These results lead to immediate applications in terahertz artificial materials exhibiting giant dichroism, suggest the use of dipole nanoantennas in nanostructure-based terahertz metamaterials, and pave the way for nanoantenna-enhanced terahertz few-molecule spectroscopy and localized terahertz nonlinear optics.
AB - The distinctive ability of nanometallic structures to manipulate light at the nanoscale has recently promoted their use for a spectacular set of applications in a wide range of areas of research including artificial optical materials, nano-imaging, biosensing, and nonlinear optics. Here we transfer this concept to the terahertz spectral region, demonstrating a metal nanostructure in shape of a dipole nanoantenna, which can efficiently resonate at terahertz frequencies, showing an effective cross section >100 times larger than its geometrical area, and a field enhancement factor of ∼280, confined on a lateral section of ∼λ/1,000. These results lead to immediate applications in terahertz artificial materials exhibiting giant dichroism, suggest the use of dipole nanoantennas in nanostructure-based terahertz metamaterials, and pave the way for nanoantenna-enhanced terahertz few-molecule spectroscopy and localized terahertz nonlinear optics.
UR - https://www.scopus.com/pages/publications/84555202866
U2 - 10.1364/OE.19.026088
DO - 10.1364/OE.19.026088
M3 - Article
C2 - 22274197
AN - SCOPUS:84555202866
SN - 1094-4087
VL - 19
SP - 26088
EP - 26094
JO - Optics Express
JF - Optics Express
IS - 27
ER -