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Thermo‐optic properties of oxidised porous silicon impregnated with index‐matching liquids for active optical components
Author(s) -
Charrier J.,
Pirasteh P.,
Pédrono N.,
Joubert P.,
Haji L.,
Bosc D.
Publication year - 2003
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
eISSN - 1521-396X
pISSN - 0031-8965
DOI - 10.1002/pssa.200306483
Subject(s) - refractive index , materials science , porosity , porous silicon , composite number , composite material , porous medium , optics , silicon , layer (electronics) , optoelectronics , physics
Oxidised porous layers (OPS) were impregnated with index‐matching liquids with high thermo‐optical coefficient. In this paper, we will present some results on the evolution of the refractive index of impregnated OPS, as a function of the temperature. Refractive index linearly varies with temperature. The thermo‐optical coefficients of OPS/liquid composite material have been measured. They directly depend on the OPS porosity. We have shown that the experimental results are in agreement with the temperature variations of the refractive index calculated using the effective medium Bruggeman model. The existence of a switching temperature T s in impregnated two‐layer plane waveguides has been demonstrated and the possibility for obtaining thermo‐optical switches is discussed.

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