Light well: a tunable free-electron light source on a chip.
The passage of a free-electron beam through a nanohole in a periodically layered metal-dielectric structure creates a new type of tunable, nanoscale radiation source--a "light well". In the reported demonstration, tunable light is generated at an intensity of approximately 200 W/cm(2) as electrons with energies in the 20-40 keV range are injected into gold-silica well structures with a lateral size of just a few hundred nanometers.
Adamo
G
G
Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, United Kingdom.
MacDonald
K F
KF
Fu
Y H
YH
Wang
C-M
CM
Tsai
D P
DP
de Abajo
F J García
FJ
Zheludev
N I
NI