Transmitting hertzian optical nanoantenna with free-electron feed.
A pair of coupled gold nanorods excited by a beam of free electrons acts as a transmitting Hertzian antenna in the optical part of the spectrum. Significantly enhanced resonant emission is observed from the antenna when the electron beam is injected around the junction between the rods, where the local density of electromagnetic states is elevated.
Denisyuk
A I
AI
Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK.
Adamo
G
G
MacDonald
K F
KF
Edgar
J
J
Arnold
M D
MD
Myroshnychenko
V
V
Ford
M J
MJ
García de Abajo
F Javier
FJ
Zheludev
N I
NI