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Omnidirectional reflectance and optical gap properties of Si/SiO2 Thue-Morse quasicrystals

Published online by Cambridge University Press:  15 March 2011

L. Dal Negro ,
M. Stolfi ,
Y. Yi ,
J. Michel ,
X. Duan ,
L.C. Kimerling ,
J. Leblanc  and
J. Haavisto
L. Dal Negro
Affiliation:
Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
M. Stolfi
Affiliation:
Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 Charles Stark Draper Laboratory, 555 Technology Square, Cambridge, MA 02139
Y. Yi
Affiliation:
Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
J. Michel
Affiliation:
Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
X. Duan
Affiliation:
Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
L.C. Kimerling
Affiliation:
Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
J. Leblanc
Affiliation:
Charles Stark Draper Laboratory, 555 Technology Square, Cambridge, MA 02139
J. Haavisto
Affiliation:
Charles Stark Draper Laboratory, 555 Technology Square, Cambridge, MA 02139
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Abstract

Aperiodic one dimensional Si/SiO2 Thue-Morse (T-M) multilayer structures have been fabricated, for the first time, in order to investigate both the band-gap behavior, with respect to the system size (band-gap scaling), and the omnidirectional reflectance of the fundamental optical band-gap. Variable angle reflectance data have experimentally demonstrated a large reflectance band-gap in the optical spectrum of a T-M quasicrystal, in agreement with transfer matrix simulations. We have explained the physical origin of the T-M omnidirectional band-gap as a result of periodic spatial correlations in the self-similar T-M structure, as revealed by Fourier Transform and Wavelet analysis. The unprecedented degree of structural flexibility showed by T-M systems can provide an attractive alternative to photonic crystals for the fabrication of photonic devices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 817: Symposium L – New Materials for Microphotonics , 2004 , L2.5
Copyright
Copyright © Materials Research Society 2004

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