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Thin film composite optical waveguides for sensor applications: a review
Abliz Yimit1, Axel G Rossberg, Takashi Amemiya
1Graduate School of Environment and Information Sciences, Yokohama National University, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan; College of Chemistry and Chemical Engineering, Xinjiang University, Xinjiang Urumqi 830046, PR China.
Talanta
|October 31, 2008
Summary
We developed highly sensitive optical sensors using thin-film composite optical waveguides (OWG). These sensors show enhanced performance for gas and immunosensing applications compared to existing technologies.
Area of Science:
- Materials Science
- Photonics
- Sensor Technology
Background:
- Optical waveguides (OWG) are crucial for sensing applications.
- Thin-film composite structures offer potential for enhanced optical properties.
Purpose of the Study:
- To design and fabricate high refractive index thin-film composite OWG for sensor applications.
- To develop a highly sensitive optical sensor device based on these OWGs.
Main Methods:
- Deposited thin-film OWG onto potassium-ion-exchanged glass OWG using sputtering or spin coating.
- Engineered adiabatic transitions for enhanced evanescent wave electric fields.
- Investigated light attenuation and sensitivity to cladding refractive index.
Main Results:
- Achieved enhanced electric field of the evanescent wave at the thin film.
- Observed minimal light attenuation in the thin film layer.
- Demonstrated sensitive changes in guided light intensity with cladding refractive index.
Conclusions:
- Thin-film composite OWGs enable highly sensitive optical sensor devices.
- These sensors exhibit superior sensitivity for gas and immunosensing compared to other technologies.
