Design and optimization of a PCF-based chemical sensor in THz regime
Autor: | Rekha Saha, Md. Ekhlasur Rahaman, Himadri Shekhar Mondal, Md. Bellal Hossain, Abdullah Al-Mamun Bulbul, Rayhan Habib Jibon |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Confinement loss
Fabrication Materials science Terahertz radiation 02 engineering and technology Chemical sensor 01 natural sciences Sensitivity (control systems) Electrical and Electronic Engineering THz applications Bio-sensor business.industry 010401 analytical chemistry Photonic crystal fiber Sense (electronics) 021001 nanoscience & nanotechnology Cladding (fiber optics) Engineering (General). Civil engineering (General) Finite element method 0104 chemical sciences Electronic Optical and Magnetic Materials Core (optical fiber) Signal Processing Optoelectronics TA1-2040 0210 nano-technology business Biotechnology Photonic-crystal fiber |
Zdroj: | Sensing and Bio-Sensing Research, Vol 32, Iss, Pp 100422-(2021) |
ISSN: | 2214-1804 |
Popis: | In terahertz frequency (THz), we have proposed a hollow core photonic crystal fiber (HC-PCF) to sense chemical. The proposed sensor consists of square shaped air holes in the cladding region with a dumbbell shaped core which has been used to fill with sample liquid. A wide range of frequency has been considered to analysis the performance of the sensor in term of relative sensitivity, effective material loss, confinement loss and effective mode area. Finite element method (FEM) has used to design and analysis numerically the optical parameters of our proposed HC-PCF sensor. To optimize the fabrication tolerance and sensing performance of the proposed sensor, square shaped air holes length, strut and core size has been also studied. Maximum relative sensitivity of 96.25%, confinement loss of 2.11×10−14 cm−1, effective material loss of 9.16×10−4 cm−1 and effective mode area of 1.29 × 106μm2 has been obtained at optimal conditions for the proposed HC-PCF sensor. We strongly believe that the optimized geometrical structure of the proposed sensor will be fabrication friendly and the sensor will contribute in real life applications. |
Databáze: | OpenAIRE |
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