Journal
NANO LETTERS
Volume 13, Issue 7, Pages 3293-3297Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl4015028
Keywords
Plasmonics; optomechanics; resonator; Brownian motion
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Funding
- The Netherlands Organisation for Scientific Research (NWO)
- European Research Council
- Marie Curie IEF grant USOM
- NCCR of Quantum Engineering
- DARPA ORCHID
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We demonstrate plasmon-mechanical coupling in a metalized nanomechanical oscillator. A coupled surface plasmon is excited in the 25 nm wide gap between two metalized silicon nitride beams. The strong plasmonic dispersion allows the nanomechanical beams thermal motion at a frequency of 4.4 MHz to be efficiently transduced to the optical transmission, with a measured displacement spectral density of 1.11 x 10(13) m/Hz(1/2). When exciting the second-order plasmonic mode at lambda = 780 nm we observe optical-power-induced frequency shifts of the mechanical oscillator. Our results show that novel functionality of plasmonic nanostructures can be achieved through coupling to engineered nanoscale mechanical oscillators.
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