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Science 19 July 1996:
Vol. 273. no. 5273, pp. 347 - 349
DOI: 10.1126/science.273.5273.347
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Reports
Complex Optical Surfaces Formed by Replica Molding Against
Elastomeric Masters
Younan Xia,
Enoch Kim,
Xiao-Mei Zhao,
John A. Rogers,
Mara Prentiss,
George M. Whitesides
*
Complex, optically functional surfaces in organic polymers can be
fabricated by replicating relief structures present on the surface of
an elastomeric master with an ultraviolet or thermally curable organic
polymer, while the master is deformed by compression, bending, or
stretching. The versatility of this procedure for fabricating surfaces
with complex, micrometer- and submicrometer-scale patterns was
demonstrated by the production of (i) diffraction gratings with periods
smaller than the original grating; (ii) chirped, blazed diffraction
gratings (where the period of a chirped grating changes continuously
with position) on planar and curved surfaces; (iii) patterned
microfeatures on the surfaces of approximately hemispherical objects
(for example, an optical surface similar to a fly's eye); and (iv)
arrays of rhombic microlenses. These topologically complex,
micropatterned surfaces are difficult to fabricate with other
techniques.
Y. Xia, E. Kim, X.-M. Zhao, J. A. Rogers, G. M. Whitesides,
Department of Chemistry, Harvard University, Cambridge, MA 02138, USA.
M. Prentiss, Department of Physics, Harvard University, Cambridge, MA
02138, USA.
*
To whom correspondence should be addressed.
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