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  • Vol. 27, Iss. 20 — Oct. 15, 2002
  • pp: 1824–1826

Near-infrared photonic crystals with higher-order bandgaps generated by two-photon photopolymerization

Martin Straub and Min Gu  »View Author Affiliations


Optics Letters, Vol. 27, Issue 20, pp. 1824-1826 (2002)
http://dx.doi.org/10.1364/OL.27.001824


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Abstract

Three-dimensional photonic crystals with bandgaps of 1.5–2.3 μm in wavelength and with gap/midgap ratios of as much as 18% were generated efficiently by two-photon photopolymerization in a liquid resin. From 0.5–1.1-mW femtosecond-pulsed 540-nm light, woodpile structures consisting of 40 layers of elliptically shaped rods spaced at 350–500 nm were fabricated by focusing with a 1.3-N.A. objective. The high degree of correlation in these structures allowed the suppression of infrared transmission by as much as 50% as well as the observation of higher-order bandgaps. We also investigated the decrease in the gap wavelength on reduction of layer spacing, in-plane rod spacing, and rod size.

© 2002 Optical Society of America

OCIS Codes
(130.0250) Integrated optics : Optoelectronics
(140.7090) Lasers and laser optics : Ultrafast lasers
(160.5470) Materials : Polymers
(220.4000) Optical design and fabrication : Microstructure fabrication
(300.6340) Spectroscopy : Spectroscopy, infrared

Citation
Martin Straub and Min Gu, "Near-infrared photonic crystals with higher-order bandgaps generated by two-photon photopolymerization," Opt. Lett. 27, 1824-1826 (2002)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-27-20-1824


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