We describe an all-electrical plasmon detection based on the near field coupling between plasmons and percolating electrons. It is the technique to electrically detect the local field enhancement from randomly distributed Cu nanoparticles coupled to a plasmon resonance. In addition, we revealed that plasmon-sensitivity is maximized at the percolation threshold, the minimum Cu particle surface coverage which can make the percolation path through the particles. Our detectors have a simple structure for easy fabrication and a high level of sensitivity to plasmon resonance.
© 2010 OSA
(230.2090) Optical devices : Electro-optical devices
(240.6680) Optics at surfaces : Surface plasmons
(260.5150) Physical optics : Photoconductivity
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(310.6628) Thin films : Subwavelength structures, nanostructures
Optics at Surfaces
Original Manuscript: June 8, 2010
Revised Manuscript: July 8, 2010
Manuscript Accepted: July 8, 2010
Published: July 20, 2010
Ki Youl Yang, Kyung Cheol Choi, Il-Suk Kang, and Chi Won Ahn, "Surface plasmon resonance enhanced photoconductivity in Cu nanoparticle films," Opt. Express 18, 16379-16386 (2010)
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