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Parallel Transduction of Nanomechanical Motion Using Plasmonic Resonators.

Thijssen R, Kippenberg TJ, Polman A, Verhagen E - ACS Photonics (2014)

Bottom Line: We demonstrate parallel transduction of thermally driven mechanical motion of an array of gold-coated silicon nitride nanomechanical beams, by using near-field confinement in plasmonic metal-insulator-metal resonators supported in the gap between the gold layers.The free-space optical readout, enabled by the plasmonic resonances, allows for addressing multiple mechanical resonators in a single measurement.The appearance of photothermally driven parametric amplification indicates the possibility of plasmonic mechanical actuation.

View Article: PubMed Central - PubMed

Affiliation: Center for Nanophotonics, FOM Institute AMOLF , Science Park 104, 1098XG Amsterdam, The Netherlands.

ABSTRACT

We demonstrate parallel transduction of thermally driven mechanical motion of an array of gold-coated silicon nitride nanomechanical beams, by using near-field confinement in plasmonic metal-insulator-metal resonators supported in the gap between the gold layers. The free-space optical readout, enabled by the plasmonic resonances, allows for addressing multiple mechanical resonators in a single measurement. Light absorbed in the metal layer of the beams modifies their mechanical properties, allowing photothermal tuning of the eigenfrequencies. The appearance of photothermally driven parametric amplification indicates the possibility of plasmonic mechanical actuation.

No MeSH data available.


Mechanical response of a beam undergoing thermallyinduced parametricamplification, showing greatly increased response amplitude, higheffective Q-factor, and higher order sidebands ofthe fundamental out-of-plane mode at 2.21 MHz.
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fig6: Mechanical response of a beam undergoing thermallyinduced parametricamplification, showing greatly increased response amplitude, higheffective Q-factor, and higher order sidebands ofthe fundamental out-of-plane mode at 2.21 MHz.

Mentions: We have also studied the out-of-planemechanical mode under highillumination power; Figure 6 shows the mechanicalresonance spectrum for an array of eight beams under 10 mW irradiation.The mechanical transduction amplitude exceeds the noise by 50 dB andis much more than in Figure 3. Also, the effectivequality factor of the resonance increases to Qm > 50.000; this is a lower limit determined by thermalfluctuationsthat shift the resonance during the measurement averaging time. Figure 6 shows several harmonics at a frequency spacingexactly equal to the fundamental frequency of 2.21 MHz. The appearanceof these higher order sidebands is intrinsic to the large modulationamplitude (up to 10% of the dc transmitted power). At these modulationamplitudes, power is transferred not only to the first sideband butalso to higher order sidebands.33 Spectrasuch as that shown in Figure 6 are observedfor laser powers > 8 mW, with the exact threshold depending onthelaser focusing condition.


Parallel Transduction of Nanomechanical Motion Using Plasmonic Resonators.

Thijssen R, Kippenberg TJ, Polman A, Verhagen E - ACS Photonics (2014)

Mechanical response of a beam undergoing thermallyinduced parametricamplification, showing greatly increased response amplitude, higheffective Q-factor, and higher order sidebands ofthe fundamental out-of-plane mode at 2.21 MHz.
© Copyright Policy - editor-choice
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4307941&req=5

fig6: Mechanical response of a beam undergoing thermallyinduced parametricamplification, showing greatly increased response amplitude, higheffective Q-factor, and higher order sidebands ofthe fundamental out-of-plane mode at 2.21 MHz.
Mentions: We have also studied the out-of-planemechanical mode under highillumination power; Figure 6 shows the mechanicalresonance spectrum for an array of eight beams under 10 mW irradiation.The mechanical transduction amplitude exceeds the noise by 50 dB andis much more than in Figure 3. Also, the effectivequality factor of the resonance increases to Qm > 50.000; this is a lower limit determined by thermalfluctuationsthat shift the resonance during the measurement averaging time. Figure 6 shows several harmonics at a frequency spacingexactly equal to the fundamental frequency of 2.21 MHz. The appearanceof these higher order sidebands is intrinsic to the large modulationamplitude (up to 10% of the dc transmitted power). At these modulationamplitudes, power is transferred not only to the first sideband butalso to higher order sidebands.33 Spectrasuch as that shown in Figure 6 are observedfor laser powers > 8 mW, with the exact threshold depending onthelaser focusing condition.

Bottom Line: We demonstrate parallel transduction of thermally driven mechanical motion of an array of gold-coated silicon nitride nanomechanical beams, by using near-field confinement in plasmonic metal-insulator-metal resonators supported in the gap between the gold layers.The free-space optical readout, enabled by the plasmonic resonances, allows for addressing multiple mechanical resonators in a single measurement.The appearance of photothermally driven parametric amplification indicates the possibility of plasmonic mechanical actuation.

View Article: PubMed Central - PubMed

Affiliation: Center for Nanophotonics, FOM Institute AMOLF , Science Park 104, 1098XG Amsterdam, The Netherlands.

ABSTRACT

We demonstrate parallel transduction of thermally driven mechanical motion of an array of gold-coated silicon nitride nanomechanical beams, by using near-field confinement in plasmonic metal-insulator-metal resonators supported in the gap between the gold layers. The free-space optical readout, enabled by the plasmonic resonances, allows for addressing multiple mechanical resonators in a single measurement. Light absorbed in the metal layer of the beams modifies their mechanical properties, allowing photothermal tuning of the eigenfrequencies. The appearance of photothermally driven parametric amplification indicates the possibility of plasmonic mechanical actuation.

No MeSH data available.