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Optical Characterization of Cadmium Telluride Doped Heterostructured Opaline Photonic Crystal

Published online by Cambridge University Press:  17 March 2011

V. G. Solovyev ,
S.G. Romanov ,
C.M. Sotomayor Torres ,
N. Gaponik ,
A. Eychmüller  and
A. L. Rogach
V. G. Solovyev
Affiliation:
Institute of Materials Science and Dept. of Electrical and Information Engineering, University of Wuppertal, Gauss-str. 20, 42097 Wuppertal, Germany
S.G. Romanov
Affiliation:
Institute of Materials Science and Dept. of Electrical and Information Engineering, University of Wuppertal, Gauss-str. 20, 42097 Wuppertal, Germany
C.M. Sotomayor Torres
Affiliation:
Institute of Materials Science and Dept. of Electrical and Information Engineering, University of Wuppertal, Gauss-str. 20, 42097 Wuppertal, Germany
N. Gaponik
Affiliation:
Institute of Physical Chemistry, University of Hamburg, Bundesstr. 45, 20146, Hamburg, Germany
A. Eychmüller
Affiliation:
Institute of Physical Chemistry, University of Hamburg, Bundesstr. 45, 20146, Hamburg, Germany
A. L. Rogach
Affiliation:
Institute of Physical Chemistry, University of Hamburg, Bundesstr. 45, 20146, Hamburg, Germany
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Abstract

A double-layer photonic crystal (PhC) possessing incomplete photonic band gap (PBG) has been prepared by successive formation of one opaline film on top of another and subsequent impregnation with CdTe colloidal nanocrystals as the light source. Transmission, reflection and photoluminescence (PL) spectra of this nanocomposite have been measured from 1.8 to 2.5 eV at different angles of the light incidence and detection. The suppression of emission intensity has been found at both stop bands of the PhC heterostructure. Depending on the excitation power, either suppression or enhancement of the emission rate at the stop band has been observed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 694: Symposium K – Microphotonics 2001–Materials, Physics and Applications , 2001 , K7.8
Copyright
Copyright © Materials Research Society 2002

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References

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