Thin films of peroxopolytungstic acids: applications to optical waveguide components
Article first published online: 1 NOV 2004
Copyright © 1991 John Wiley & Sons, Ltd.
Applied Organometallic Chemistry
Volume 5, Issue 4, pages 295–301, July/August 1991
How to Cite
Itoh, K., Okamoto, T., Wakita, S., Niikura, H. and Murabayashi, M. (1991), Thin films of peroxopolytungstic acids: applications to optical waveguide components. Appl. Organometal. Chem., 5: 295–301. doi: 10.1002/aoc.590050413
- Issue published online: 1 NOV 2004
- Article first published online: 1 NOV 2004
- Manuscript Revised: 24 APR 1991
- Manuscript Received: 27 FEB 1991
- Peroxopolytungstic acid;
- refractive index;
- optical waveguide;
- diffractional grating;
Thin films of peroxohetero(carbon)polytungstic acid (CW-HPA) and carbon-free isopolytungstic acid (W-IPA) were prepared, and examined in terms of optical and etching properties. Thermal decomposition was found to give good results in removing excess hydrogen peroxide (H2O2) during the preparation of CW-HPA and W-IPA. It was shown for the first time that thin films of CW-HPA and W-IPA have very high refractive indices (larger than 2.0) when sufficiently dried. Optical waveguide (OWG) characteristics of these films were examined using a slab-type OWG structure and ARROW (Antiresonance Reflection Optical Waveguide)-type structures. An embossing technique was applied to make diffractional grating couplers.