Evanescent absorption based fluoride fiber sensing enhancement led by doped graphene’s thermo-optic dispersion in NIR
| Autor: | Anuj K. Sharma, Ishika Sharma |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Amorphous silicon
Materials science Silicon chemistry.chemical_element 02 engineering and technology 01 natural sciences law.invention 010309 optics chemistry.chemical_compound law 0103 physical sciences Dispersion (optics) Fiber Electrical and Electronic Engineering Absorption (electromagnetic radiation) Graphene business.industry Doping 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry Fiber optic sensor Optoelectronics 0210 nano-technology business |
| Zdroj: | Optical and Quantum Electronics. 51 |
| ISSN: | 1572-817X 0306-8919 |
| DOI: | 10.1007/s11082-019-1876-y |
| Popis: | Evanescent wave absorption based fiber optic sensor with fluoride core, doped silica clad, amorphous silicon layer, and graphene monolayer is studied in near infrared for highly sensitive and precise recognition of melanoma in liver tissues. The findings reveal that by carefully tuning the graphene’s dispersive behavior through doping and operating at slightly increased temperature (above room temperature) can lead to significantly high sensitivity and fine resolution. An optimum combination ‘1550 nm wavelength, 0.6 eV chemical potential (of graphene), and 311.1 K temperature’ leads to 112.211 mW/RIU sensitivity and 8.91 × 10−10 RIU resolution. An ultrathin silicon layer leads to better performance along with improved stability against possible oxidation and thermal issues. A detailed survey finds that the above performance (resolution, in particular) is largely superior than the fiber sensors based on different techniques. The proposed sensor can be amended accordingly for biomedical applications needing high precision of tissue/process monitoring. |
| Databáze: | OpenAIRE |
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