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Proceedings Paper

Scattering of light by a sub-monolayer of randomly packed dielectric microspheres giving color effects in transmission
Author(s): Mickaël Guillaumée; Martha Liley; Raphaël Pugin; Ross P. Stanley
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Paper Abstract

In this paper, we show that a two-dimensional random system can display strong structural colors in transmission. Polystyrene microspheres with a diameter between 0.5 and 1μm have been randomly adsorbed onto a glass substrate. In this size range, light is mainly scattered in the forward direction. Consequently, in-plane multiple scattering can be neglected while spheres are not too close to each others. This allows one to use a single scattering approximation to reproduce transmission spectra of the system. Under appropriate conditions, destructive interferences between incident and scattered light can cause a full extinction in the transmission. In our case, transmission can be as low as 5% at some frequency ranges, generating strong color effects. Additionally, the film color changes with the angle of observation. This angular dependant color is reproduced theoretically taking into account multiple scattering between spheres.

Paper Details

Date Published: 23 April 2008
PDF: 8 pages
Proc. SPIE 6988, Nanophotonics II, 69881I (23 April 2008); doi: 10.1117/12.785120
Show Author Affiliations
Mickaël Guillaumée, Swiss Ctr. for Electronics and Microtechnology SA (Switzerland)
Martha Liley, Swiss Ctr. for Electronics and Microtechnology SA (Switzerland)
Raphaël Pugin, Swiss Ctr. for Electronics and Microtechnology SA (Switzerland)
Ross P. Stanley, Swiss Ctr. for Electronics and Microtechnology SA (Switzerland)

Published in SPIE Proceedings Vol. 6988:
Nanophotonics II
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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