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Submicrometer Dimple Array Based Interference Color Field Displays and

Summary: Submicrometer Dimple Array Based
Interference Color Field Displays and
H. J. Lezec,, J. J. McMahon, O. Nalamasu,| and P. M. Ajayan*,|
Thomas J. Watson Laboratory of Applied Physics, California Institute of Technology,
Pasadena, California 91125, Centre National de la Recherche Scientifique,
3 rue Michel-Ange, 75794 Paris Cedex 16, France, and Center for Integrated
Electronics and Department of Materials Science and Engineering, Rensselaer
Polytechnic Institute, Troy, New York 12180
Received October 15, 2006; Revised Manuscript Received December 10, 2006
We report a technique for producing bright color fields over extended surfaces, via optical interference, with the capability of producing
arbitrary visible colors in areas as small as 100 m2. Periodic arrays of submicrometer dimples are fabricated on reflective silicon surfaces,
and diffraction-induced mutual interference of light reflected from the upper and lower levels of the dimpled surfaces generates color depending
on wavelength scaled dimple depth and periodicity. Colors of the entire visible spectrum can be generated by dimple arrays with different
dimple depths. The topological permeability of such an open surface readily allows infusion of liquids, with different refractive indices, for
color switching and detection. These easy to fabricate, scalable, robust devices, on solid as well as flexible supports, could find a wide range
of applications such as cheap high-resolution printable dye/pigment-free displays, reliable index-of-refraction sensors with color readout for
liquids, and lab-on-chip liquid flow monitors.
Though colors are generally created from pigments or


Source: Ajayan, Pulickel M. - Department of Mechanical Engineering and Materials Science, Rice University


Collections: Materials Science