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Generating a sub-wavelength Bessel-like light beam using a tapered hollow tube |
Optics Letters, Vol. 37, Issue 21, pp. 4537-4539 (2012)
http://dx.doi.org/10.1364/OL.37.004537
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Abstract
We present a series of sub-wavelength annular aperture (SAA) structures with annular width equal to the tip of a tapered hollow tube, which was fabricated using a heat-pulled method. The light beams emitted from the SAA-like structures created by the tapered hollow tube produced light beams characteristic of Bessel beams. We obtained a sub-micrometer focal spot with a depth-of-focus larger than 7 μm and identified the proper structure parameters needed to generate Bessel-like light beams. Our new design has potential application to areas such as optical lithography, optical trapping, and the fabrication of high aspect ratio structures.
© 2012 Optical Society of America
OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(220.4000) Optical design and fabrication : Microstructure fabrication
(050.6624) Diffraction and gratings : Subwavelength structures
ToC Category:
Diffraction and Gratings
History
Original Manuscript: September 5, 2012
Revised Manuscript: October 1, 2012
Manuscript Accepted: October 1, 2012
Published: October 30, 2012
Citation
Chun-Yen Chen, Yu-Hsun Lee, Chih-Jen Chien, Ming-Han Chung, Yuh-Yan Yu, Te-Hsun Chen, and Chih-Kung Lee, "Generating a sub-wavelength Bessel-like light beam using a tapered hollow tube," Opt. Lett. 37, 4537-4539 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-21-4537
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