Plasmonic tomography of optical vortices
Optics Letters, Vol. 35, Issue 22, pp. 3775-3777 (2010)
http://dx.doi.org/10.1364/OL.35.003775
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Abstract
We present a method for analyzing the wavefront of optical vortices that does not involve interferometry but rather uses surface plasmon polaritons (SPPs). We employ a subwavelength slit in a gold film to cut slices from an optical vortex beam and measure the diffraction of the generated SPPs by scattering them off a second slit. By moving the slits across the vortex beam, we create a tomogram, from which we can determine the vortex charge of the incident beam at a glance. We present results for vortex beams of integer- and half-integer-vortex charge.
© 2010 Optical Society of America
OCIS Codes
(100.6950) Image processing : Tomographic image processing
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(240.6680) Optics at surfaces : Surface plasmons
(050.4865) Diffraction and gratings : Optical vortices
(050.6624) Diffraction and gratings : Subwavelength structures
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: August 20, 2010
Revised Manuscript: October 8, 2010
Manuscript Accepted: October 13, 2010
Published: November 4, 2010
Citation
Philip F. Chimento, Gert W. ’t Hooft, and Eric R. Eliel, "Plasmonic tomography of optical vortices," Opt. Lett. 35, 3775-3777 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-22-3775
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