Focusing of light beyond the diffraction limit of half the wavelength
Optics Letters, Vol. 35, Issue 22, pp. 3763-3765 (2010)
http://dx.doi.org/10.1364/OL.35.003763
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Abstract
The diffraction limit sets the smallest achievable linewidth at half the wavelength. With a subwavelength plasmonic lens allowing one to reduce the diffraction via an asymmetry and to generate and squeeze the wave functions, an incident light is focused by the aperture to a single line with its width smaller than the limited value in the intermediate zone. The focused fields are capable of propagating in free space. This light focusing process, besides being of academic interest, is expected to open up a wide range of application possibilities.
© 2010 Optical Society of America
OCIS Codes
(100.6640) Image processing : Superresolution
(110.0180) Imaging systems : Microscopy
(160.1245) Materials : Artificially engineered materials
(050.1965) Diffraction and gratings : Diffractive lenses
(110.4235) Imaging systems : Nanolithography
(050.6624) Diffraction and gratings : Subwavelength structures
ToC Category:
Diffraction and Gratings
History
Original Manuscript: June 9, 2010
Revised Manuscript: September 1, 2010
Manuscript Accepted: September 25, 2010
Published: November 4, 2010
Virtual Issues
Vol. 6, Iss. 1 Virtual Journal for Biomedical Optics
Citation
K. R. Chen, "Focusing of light beyond the diffraction limit of half the wavelength," Opt. Lett. 35, 3763-3765 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-22-3763
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