Rayleigh scattering in multilayered structures of porous silicon
Por:
Solano M.T., Rubo Y.G., Del Rio J.A., Arenas M.C.
Publicada:
1 ene 2005
Resumen:
We present the transmittance spectra of several free-standing porous silicon multilayered structures, which are the sandwich arrangements of a half-wavelength "defect" layer embedded in two Bragg mirrors (one-dimensional photonic crystals made of a small number N of porous silicon reflective layers). For N = 3,4, and 5, the resonant transparency peaks were observed. These peaks, however, are greatly reduced with respect to the ideal Breit-Wigner peaks. The resonant peaks become completely suppressed for N > 5. The suppression of the resonant transmittance peaks is explained by the presence of the Rayleigh scattering (RS) of light by the disorder in the structure of the porous silicon. © 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.