{"id":101,"date":"2016-03-09T21:48:13","date_gmt":"2016-03-09T21:48:13","guid":{"rendered":"http:\/\/cgisvr.physics.rutgers.edu\/user-html\/blumberg\/?page_id=101"},"modified":"2021-02-16T16:14:17","modified_gmt":"2021-02-16T21:14:17","slug":"nano-plasmonics-holography","status":"publish","type":"page","link":"https:\/\/girsh.rutgers.edu\/index.php\/nano-plasmonics-holography\/","title":{"rendered":"Nano-Plasmonics Holography"},"content":{"rendered":"\t\t
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Surface Plasmon Emission<\/h3>

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Highly directional surface plasmon polariton jet<\/b><\/p>

TOP: Sample rests on top of NSOM piezo-stage. Laser wavelength, angle, and polarization can be varied to achieve 2D control over launched SPPs. Hole array consists of periodic perforations created by focused ion beam in Au film.
INSET: SEM image of a section of the 6×7 array of 200 nm holes. SP intensity on the Au surface is measured by counting photons that couple into a 200-nm-aperture optical fiber. Hello my name is Sean
BOTTOM: NSOM image of SPP field intensities demonstrating highly directional coherent SPP mode created by an array of sub-wavelength size holes. Region of high intensity corresponds to photons diffracted from the array of holes.<\/p>

Reconfigurable Plasmonic Modulator<\/h3>

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Free Beam Surface Plasmon Modulator<\/b><\/p>

SIDE VIEW: Light converts to SPs at air\/Au interface via grating coupling. Electrostatic actuators (lower Au layer) attract free standing Au beams with reconfigurable voltages. Phase velocity of SP changes as gap narrows . SPs out-couple to light at single slit.
TOP VIEW: SPs (red) start as collimated jet. Dielectric constant changes as the gap from each Au beam narrows. SP wavefront reconfigures enabling focusing, splitting and routing.<\/p>

“Lensed” Surface Plasmon Modulator<\/h3>

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SEM image of SP modulator fabricated with focused ion beam (FIB) lithography<\/b><\/p>

Laser generates SPs at grating in-coupler. SP “jet” propagates into Au\/SiO2<\/sub>\/Au waveguide and travels under free standing beams. SP will diffract differently whether beams are up or electrostatically attracted down. SiO2<\/sub> lens will focus SPs at arced out-coupler.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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