Slab waveguide with conducting interfaces as an efficient optical sensor: TE case
| Autor: | Sameh S. Mahdi, Ibrahim M. Qadoura, Sofyan A. Taya, Anas A. Alkanoo |
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| Rok vydání: | 2016 |
| Předmět: |
Analyte
Materials science business.industry Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Cladding (fiber optics) 01 natural sciences Atomic and Molecular Physics and Optics 010309 optics Surface conductivity Optics Optical sensing 0103 physical sciences Slab Optoelectronics 0210 nano-technology business Refractive index |
| Zdroj: | Journal of Modern Optics. 64:836-843 |
| ISSN: | 1362-3044 0950-0340 |
| DOI: | 10.1080/09500340.2016.1262072 |
| Popis: | In this paper, three-layer slab waveguide structure is treated for optical sensing applications. Four waveguide configurations including different guiding films and analytes are assumed. A conducting two-dimensional free charge layers with a surface conductivity is assumed to exist at the substrate/film and film/cladding interfaces. The sensing sensitivity of the proposed structure to any changes in an analyte refractive index uniformly distributed in the cladding layer is investigated. Positive as well as negative surface conductivities are considered. It is found that utilizing positive surface conductivity can enhance the sensitivity, whereas using negative values of the surface conductivity reduces the sensitivity. |
| Databáze: | OpenAIRE |
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