Planar metamaterial analogue of electromagnetically induced transparency for plasmonic sensing.
We experimentally demonstrate a planar metamaterial analogue of electromagnetically induced transparency at optical frequencies. The structure consists of an optically bright dipole antenna and an optically dark quadrupole antenna, which are cut-out structures in a thin gold film. A pronounced coupling-induced reflectance peak is observed within a broad resonance spectrum. A metamaterial sensor based on these coupling effects is experimentally demonstrated and yields a sensitivity of 588 nm/RIU and a figure of merit of 3.8.
Liu
Na
N
4 Physikalisches Institut, Universität Stuttgart, Stuttgart, Germany.
Weiss
Thomas
T
Mesch
Martin
M
Langguth
Lutz
L
Eigenthaler
Ulrike
U
Hirscher
Michael
M
Sönnichsen
Carsten
C
Giessen
Harald
H
D004574:Electromagnetic Fields; D004867:Equipment Design; D006046:Gold / Q000737:chemistry; D008567:Membranes, Artificial; D036103:Nanotechnology / Q000295:instrumentation*; D055095:Optics and Photonics; D010316:Particle Size; D012031:Refractometry / Q000295:instrumentation*; D013499:Surface Properties
D008567:Membranes, Artificial; D006046:Gold