TY - JOUR
T1 - Direct measurement of dispersion relation for surface plasmon-polaritons on silver nanoantennas
AU - Saito, Hikaru
AU - Kurata, Hiroki
N1 - Publisher Copyright:
© The Author 2013. Published by Oxford University Press on behalf of The Japanese Society of Microscopy. All rights reserved.
PY - 2014/4
Y1 - 2014/4
N2 - We investigated the degree to which the dispersion relation of surface plasmon-polaritons excited on silver nanoantennas depends on length. To accomplish this, dispersion measurements for individual silver nanoantennas with lengths from 220 nm to 2.5 μm were performed using angle-resolved electron energy-loss spectroscopy (AREELS) and spatially resolved EELS (SREELS). AREELS enabled measurements of the dispersion relation extending into the high-energy region of 2.6 eV for a 2.5-μm-long silver nanoantenna, without the need to excite Fabry–Perot-type resonances. Our experiments showed that the dispersion relation of silver nanoantennas that have the same diameter is independent of their individual lengths.
AB - We investigated the degree to which the dispersion relation of surface plasmon-polaritons excited on silver nanoantennas depends on length. To accomplish this, dispersion measurements for individual silver nanoantennas with lengths from 220 nm to 2.5 μm were performed using angle-resolved electron energy-loss spectroscopy (AREELS) and spatially resolved EELS (SREELS). AREELS enabled measurements of the dispersion relation extending into the high-energy region of 2.6 eV for a 2.5-μm-long silver nanoantenna, without the need to excite Fabry–Perot-type resonances. Our experiments showed that the dispersion relation of silver nanoantennas that have the same diameter is independent of their individual lengths.
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U2 - 10.1093/jmicro/dft048
DO - 10.1093/jmicro/dft048
M3 - Letter
AN - SCOPUS:84929581100
VL - 63
SP - 155
EP - 159
JO - Microscopy (Oxford, England)
JF - Microscopy (Oxford, England)
SN - 2050-5698
IS - 2
ER -