کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1486503 | 1510557 | 2006 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Planar chalcogenide glass waveguides for IR evanescent wave sensors Planar chalcogenide glass waveguides for IR evanescent wave sensors](/preview/png/1486503.png)
Multi-layered chalcogenide glass waveguide structures have been fabricated for evanescent wave sensing of bio-toxins and other sensor applications. Thin films of Ge containing chalcogenides have been deposited onto Si substrates, with a-GeSe2 as the lower cladding layer and a-GeSbSe as the core layer, to form the slab waveguide. The absence of a defined upper cladding layer enhances the leakage necessary to sense the target molecules. Modal refractive index is estimated from the m-lines. It is shown that photo-induced structural changes by 808 nm laser light in the core layer selectively enhance refractive index in the exposed regions, and thus provide a convenient method to form channel waveguides. A thin layer of Au has been deposited on top of the core layer for the attachment of linker molecules for biosensor application; ATR confirms this.
Journal: Journal of Non-Crystalline Solids - Volume 352, Issues 6–7, 15 May 2006, Pages 584–588