Digital design of multimaterial photonic particles

TitleDigital design of multimaterial photonic particles
Publication TypeJournal Article
Year of Publication2016
AuthorsTao, G, Kaufman, JJ, Shabahang, S, Naraghi, RRezvani, Sukhov, SV, Joannopoulos, JD, Fink, Y, Dogariu, A, Abouraddy, AF
JournalProceedings of the National Academy of Sciences of the United States of America
Pagination6839 - 6844
Date Published2016/06/21/
ISBN Number0027-8424
Keywordscapillary instabilities, core-shell nanoparticles, encapsulation, fibers, fluid instabilities, light-scattering, microparticles, mie scattering, multimaterial fibers, optical scattering, particles, resonances, spectral optical-properties, spheres

Scattering of light fromdielectric particles whose size is on the order of an optical wavelength underlies a plethora of visual phenomena in nature and is a foundation for optical coatings and paints. Tailoring the internal nanoscale geometry of such "photonic particles" allows tuning their optical scattering characteristics beyond those afforded by their constitutive materials-however, flexible yet scalable processing approaches to produce such particles are lacking. Here, we show that a thermally induced in-fiber fluid instability permits the "digital design" of multimaterial photonic particles: the precise allocation of high refractive-index contrast materials at independently addressable radial and azimuthal coordinates within its 3D architecture. Exploiting this unique capability in all-dielectric systems, we tune the scattering cross-section of equisized particles via radial structuring and induce polarization-sensitive scattering from spherical particles with broken internal rotational symmetry. The scalability of this fabrication strategy promises a generation of optical coatings in which sophisticated functionality is realized at the level of the individual particles.

Short TitleProc. Natl. Acad. Sci. U. S. A.