Journal
OPTICS LETTERS
Volume 36, Issue 17, Pages 3305-3307Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.36.003305
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Funding
- National Natural Science Foundation of China (NSFC) [61008035, 90923037]
- 873 Program [2009AA03Z401]
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Herein, we report a facile approach for rapid and maskless production of subwavelength structured antireflective surfaces with high and broadband transmittance-direct laser interference ablation. The interfered laser beams were introduced into the surface of a bare optical substrate, where structured surfaces consisting of a micropillar array were produced by two-step laser irradiation in the time frame of seconds. A multiple exposure of the two-beam interference approach was proposed instead of multiple-beam interference to simply realize planar patterns of a high aspect ratio. Tall sinusoidal pillars were created and shaped by pulse shot number control. As an example of the application, zinc sulfide substrates were processed with the technology, from which high transmission at an infrared wavelength, over 92%, at normal incidence was experimentally achieved. (C) 2011 Optical Society of America
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