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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 3 — Feb. 1, 2014
  • pp: 606–609

Rapid fabrication of a large-area close-packed quasi-periodic microlens array on BK7 glass

Feng Chen, Zefang Deng, Qing Yang, Hao Bian, Guangqing Du, Jinhai Si, and Xun Hou  »View Author Affiliations


Optics Letters, Vol. 39, Issue 3, pp. 606-609 (2014)
http://dx.doi.org/10.1364/OL.39.000606


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Abstract

Large-area close-packed microlens arrays (MLAs) are highly desirable for structured light and integrated optical applications. However, efficient realization of ultralarge area MLAs with a high fill factor is still technically challenging, especially on glass material. In this Letter we propose a high-efficiency MLA fabrication method using single-pulsed femtosecond laser wet etch and close-packed quasi-periodic concave MLAs consisting of three million units fabricated on silica glass within an hour. The fabricated MLAs are demonstrated to have extreme optical smoothness (8.5nm) by an atomic force microscope. It has also been demonstrated that the profile of the quasi-periodic concave structures could be easily tuned by changing the laser scanning speed or the pulse energy. Additionally, the optical performances of the MLA diffusers were investigated by using sharp focusing, high-resolution imaging, and flat-top illumination.

© 2014 Optical Society of America

OCIS Codes
(140.3330) Lasers and laser optics : Laser damage
(140.3390) Lasers and laser optics : Laser materials processing
(220.3630) Optical design and fabrication : Lenses
(230.1980) Optical devices : Diffusers
(320.2250) Ultrafast optics : Femtosecond phenomena
(240.3990) Optics at surfaces : Micro-optical devices

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: September 30, 2013
Revised Manuscript: December 5, 2013
Manuscript Accepted: December 16, 2013
Published: January 28, 2014

Citation
Feng Chen, Zefang Deng, Qing Yang, Hao Bian, Guangqing Du, Jinhai Si, and Xun Hou, "Rapid fabrication of a large-area close-packed quasi-periodic microlens array on BK7 glass," Opt. Lett. 39, 606-609 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-3-606


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