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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 25 — Sep. 1, 2007
  • pp: 6350–6354

Thick, three-dimensional nanoporous density-graded materials formed by optical exposures of photopolymers with controlled levels of absorption

Yun-Suk Nam, Seokwoo Jeon, Daniel Jay-Lee Shir, Alex Hamza, and John A. Rogers  »View Author Affiliations


Applied Optics, Vol. 46, Issue 25, pp. 6350-6354 (2007)
http://dx.doi.org/10.1364/AO.46.006350


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Abstract

Three-dimensional (3D) intensity distributions generated by light passing through conformal phase masks can be modulated by the absorption property of photosensitive materials. The intensity distributions have extremely long depth of focus, which is proportional to the size of the phase masks, and this enables one to pattern thick ( 100 μ m ) , nanoporous structures with precise control of grade density. Various density-graded 3D structures that result from computational modeling are demonstrated. Results of x-ray radiograph and the controlled absorption coefficient prove the dominant mechanism of the generated graded density is absorption of the photosensitive materials. The graded-density structures can be applied to a chemical reservoir for controlled release of chemicals and laser target reservoirs useful to shape shockless wave compression.

© 2007 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(220.4000) Optical design and fabrication : Microstructure fabrication
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

ToC Category:
Diffraction and Gratings

History
Original Manuscript: April 25, 2007
Revised Manuscript: June 5, 2007
Manuscript Accepted: June 13, 2007
Published: August 27, 2007

Virtual Issues
Vol. 2, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Yun-Suk Nam, Seokwoo Jeon, Daniel Jay-Lee Shir, Alex Hamza, and John A. Rogers, "Thick, three-dimensional nanoporous density-graded materials formed by optical exposures of photopolymers with controlled levels of absorption," Appl. Opt. 46, 6350-6354 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-25-6350

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