Silicon Colloids: From Microcavities to Photonic Sponges

Authors

  • R. Fenollosa,

    1. Unidad Asociada CSIC-UPV, Universidad Politécnica de Valencia, Avda Tarongers s/n, 46022, Valencia (Spain)
    2. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (CSIC), C/ Sor Juan Inés de la Cruz, 3, 28049, Madrid (Spain)
    Search for more papers by this author
  • F. Meseguer,

    1. Unidad Asociada CSIC-UPV, Universidad Politécnica de Valencia, Avda Tarongers s/n, 46022, Valencia (Spain)
    2. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (CSIC), C/ Sor Juan Inés de la Cruz, 3, 28049, Madrid (Spain)
    Search for more papers by this author
  • M. Tymczenko

    1. Unidad Asociada CSIC-UPV, Universidad Politécnica de Valencia, Avda Tarongers s/n, 46022, Valencia (Spain)
    2. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (CSIC), C/ Sor Juan Inés de la Cruz, 3, 28049, Madrid (Spain)
    Search for more papers by this author

  • This work was supported by project MAT2006-03097 of the Spanish Education and Science Ministry and a contract under the I3P program for doctors of the Spanish Research Council. M.T. acknowledges a scholarship from “Tekn. dr Marcus Wallenbergs Stiftelse för utbildning i internationellt industriellt företagande”. The authors would like to thank several researchers who facilitated this work: Juan Martínez Pastor and Josep Canet for advice about optical characterization, Ana Cros Stötter for performing Raman measurements, Vicente Fornés for help with optical transmittance measurements of photonic sponges, Luis M. Liz-Marzan for advice about Mie resonances calculation, and M.-Isabelle Rodríguez and Vicente Fornés for their critical reading of the manuscript.

Abstract

original image

Silicon colloids with diameters from 0.5 μm to 5 μm are synthesized. Because of their spherical shape and smooth surface they work as optical microcavities with well-defined resonating modes in the near-infrared range. Silicon colloids are also the building blocks of photonic sponges formed by disorder networks of microspheres of different sizes that scatter light strongly in a wide range of wavelengths

Ancillary