TY - JOUR
T1 - Nanoantenna array-induced fluorescence enhancement and reduced lifetimes
AU - Bakker, R. M.
AU - Drachev, V. P.
AU - Liu, Z.
AU - Yuan, H.K.
AU - Pedersen, Rasmus Haugstrup
AU - Boltasseva, Alexandra
AU - Chen, J.
AU - Irudayaraj, J.
AU - Kildishev, A.V.
AU - Shalaev, V.M.
PY - 2008
Y1 - 2008
N2 - Enhanced fluorescence is observed from dye molecules interacting with optical nanoantenna arrays. Elliptical gold dimers form individual nanoantennae with tunable plasmon resonances depending upon the geometry of the two particles and the size of the gap between them. A fluorescent dye, Rhodamine 800, is uniformly embedded in a dielectric host that coats the nanoantennae. The nanoantennae act to enhance the dye absorption. In turn, emission from the dye drives the plasmon resonance of the antennae; the nanoantennae act to enhance the fluorescence signal and change the angular distribution of emission. These effects depend upon the overlap of the plasmon resonance with the excitation wavelength and the fluorescence emission band. A decreased fluorescence lifetime is observed along with highly polarized emission that displays the characteristics of the nanoantenna's dipole mode. Being able to engineer the emission of the dye-nanoantenna system is important for future device applications in both bio-sensing and nanoscale optoelectronic integration.
AB - Enhanced fluorescence is observed from dye molecules interacting with optical nanoantenna arrays. Elliptical gold dimers form individual nanoantennae with tunable plasmon resonances depending upon the geometry of the two particles and the size of the gap between them. A fluorescent dye, Rhodamine 800, is uniformly embedded in a dielectric host that coats the nanoantennae. The nanoantennae act to enhance the dye absorption. In turn, emission from the dye drives the plasmon resonance of the antennae; the nanoantennae act to enhance the fluorescence signal and change the angular distribution of emission. These effects depend upon the overlap of the plasmon resonance with the excitation wavelength and the fluorescence emission band. A decreased fluorescence lifetime is observed along with highly polarized emission that displays the characteristics of the nanoantenna's dipole mode. Being able to engineer the emission of the dye-nanoantenna system is important for future device applications in both bio-sensing and nanoscale optoelectronic integration.
U2 - 10.1088/1367-2630/10/12/125022
DO - 10.1088/1367-2630/10/12/125022
M3 - Journal article
SN - 1367-2630
VL - 10
SP - 125022
JO - New Journal of Physics
JF - New Journal of Physics
ER -