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Dynamic generation of plasmonic Moiré fringes using phase-engineered optical vortex beam |
Optics Letters, Vol. 37, Issue 13, pp. 2715-2717 (2012)
http://dx.doi.org/10.1364/OL.37.002715
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Abstract
Dynamic generation of plasmonic Moiré fringes using a phase engineered optical vortex (OV) beam is experimentally demonstrated. Owing to the unique helical phase carried by an OV beam, the initial phase of surface plasmon polaritons (SPPs) emanating from a metallic grating can be adjusted dynamically by changing the phase hologram displayed on a spatial light modulator. Plasmonic Moiré fringes are readily achieved by overlapping two SPP standing waves with certain angular misalignment, excited by the positive and negative topological charge components, respectively, of a cogwheel-like OV beam. The near-field scanning optical microscopy measurement result of SPP distributions has shown a good agreement with the numerical predictions.
© 2012 Optical Society of America
OCIS Codes
(120.4120) Instrumentation, measurement, and metrology : Moire' techniques
(240.6680) Optics at surfaces : Surface plasmons
(080.4865) Geometric optics : Optical vortices
ToC Category:
Optics at Surfaces
History
Original Manuscript: April 10, 2012
Revised Manuscript: May 17, 2012
Manuscript Accepted: May 17, 2012
Published: June 26, 2012
Citation
Guanghui Yuan, Qian Wang, and Xiaocong Yuan, "Dynamic generation of plasmonic Moiré fringes using phase-engineered optical vortex beam," Opt. Lett. 37, 2715-2717 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-13-2715
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