Integrated photonic glucose biosensor using a vertically coupled microring resonator in polymers
| Autor: | Sang-Shin Lee, Ki-Do Kim, Geun-Sik Son, Gun-Duk Kim, Hak-Soon Lee |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
business.industry Optical microcavity Waveguide (optics) Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Resonator Wavelength Optics law Electrical and Electronic Engineering Physical and Theoretical Chemistry Photonics business Refractive index Biosensor Free spectral range |
| Zdroj: | Optics Communications. 281:4644-4647 |
| ISSN: | 0030-4018 |
| Popis: | A photonic glucose biosensor incorporating a vertically coupled polymeric microring resonator was proposed and accomplished. The concentration of a glucose solution was estimated by observing the shift in the resonant wavelength of the resonator. For achieving higher sensitivity the contrast between the effective refractive index of the polymeric waveguide and that of the analyte was minimized. Actually, the effective refractive index of the polymeric waveguide ( n = ∼1.390) was substantially close to that ( n = ∼1.333) of the fresh solution with no glucose. The fabricated resonator sensor with the free spectral range of 0.66 nm yielded a sensitivity of ∼280 pm/(g/dL), which corresponds to ∼200 nm/RIU (refractive index units) as a refractometric sensor, and provided a detection limit of refractive index change on the order of 10 −5 RIU. |
| Databáze: | OpenAIRE |
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