Abstract
While plasmonic nano-antennas can produce intense electric fields in
a very small area, in general, these devices cannot handle high power, because
of their small footprints. In order to increase the maximum peak power that
these devices can withstand, they can be driven by nano-second pulses from
a larger diameter Q-switched laser, which reduces the fluence reaching the
devices, thus avoiding their destruction. Furthermore, we show that an increase
in the power density capacity of the nano-antennas can be achieved by replacing
gold with titanium: more than 18 dB greater power density can be handled by
titanium based nano-antennas without significant reduction in their electric
field enhancement capabilities.
© 2013 IEEE
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