Comparative study of the highly sensitive plasmonic sensor based on a D-Shaped photonic crystal fiber with silver or gold layers

2021 ◽  
Author(s):  
Bahar Meshginqalam ◽  
Jamal Barvestani

Abstract A highly sensitive D-shaped photonic crystal fiber sensor with circular lattice is proposed for external plasmonic sensing. The proposed design of plasmonic material in a D-shaped form effectively facilitates the excitation of surface plasmons and enhances the sensor performance. As a comparative study, two different plasmonic materials, gold and silver, are applied D-shapely on the fiber and the proposed sensor performance is numerically investigated and evaluated. Moreover, the optimized structural parameters such as air-hole diameters and the thickness of silver and gold layers are selected via simulation results which cause the highest sensitivity of 40000nm/RIU for the gold coated fiber using the wavelength interrogation method. Furthermore, the maximum figure of merit can reach 621.50RIU-1. Analytes with the refractive indices ranging from 1.34 to 1.39 can be detected by double-loss peak that is a more reliable method of simultaneous detection and verification of sensing characteristics. Due to its promising results, the proposed sensor can be widely useful in the area of chemical and biological sensing.

2021 ◽  
pp. 104050
Author(s):  
M. Hussayeen Khan Anik ◽  
S.M. Riazul Islam ◽  
Hriteshwar Talukder ◽  
Sakib Mahmud ◽  
M. Ifaz Ahmad Isti ◽  
...  

2022 ◽  
Author(s):  
Pibin Bing ◽  
Qing Liu ◽  
Guifang Wu ◽  
Sheng Yuan ◽  
Zhongyang Li ◽  
...  

Abstract In this paper, a dual-core microchannel-based fiber sensor is studied by using finite element method in the visible and near-infrared bands. Plasmonic material gold (Au) is deposited in microchannel to generate the surface plasmon resonance (SPR) effect, so that sensor can detect the change in RI of its surrounding analyte. Simulation results show that the maximum wavelength sensitivity and resolution are 33600nm/RIU and 2.97×10−6RIU for y polarization in the RI range of 1.33 to 1.44, respectively. The highest figure of merit (FOM) of the sensor is 961 for y polarization. In addition, we study the effects brought by the structural changes of the fiber sensor, and the results show that the design of “microchannel coating” dramatically improves the refractive index detection ability of the sensor. The D-shaped dual-core microchannel-based photonic crystal fiber sensor proposed in this paper has a simple structure, low manufacturing complexity, and high sensitivity. Combined with external sensing technology, this sensor has great application potential in the fields of biotechnology, medical diagnosis, and environmental protection.


2021 ◽  
Author(s):  
vijayalakshmi Dhinakaran ◽  
C.T. Manimegalai ◽  
Natesan Ayyanar ◽  
Truong Khang Nguyen ◽  
K. Kalimuthu

Abstract Platinum Diselenide, PtSe2 is becoming highly trending owing to its fascinating optoelectronic, thermoelectric and semiconductor properties. They are non-toxic, chemically inert and allow high biomolecule absorption which makes them highly applicable in sensors to boost the sensing performance. Here, we propose Surface Plasmon Resonance (SPR) based Photonic Crystal Fiber (PCF) sensor for enhanced refractive index sensing at mid infrared wavelengths. In order to achieve this, tri-path PCF coated with hybrid layer of gold/PtSe2 which allows light to travel freely through the cladding and interact with the plasmonic material to create strong coupling effect. Finite Element Method is used for numerical examination and investigation of the sensing performance for the designed tri-path sensor. The optimized proposed sensor exhibits maximum wavelength sensitivity of 42,000 nm/RIU and maximum wavelength resolution of 2.4 x 10-6 within the analyte range from 1.33 to 1.38, which almost covers the unknown analytes of chemical, bio and gas. Further, we achieve very low loss and unique design to accomplish high sensitivity which makes it applicable to be a future candidate in various sensing applications.


2018 ◽  
Author(s):  
Salah S.A. Obayya ◽  
Ahmed E. Khalil ◽  
Ahmed H. El-Saeed ◽  
Mohamed A. Farag ◽  
Mohamed Farhat O. Hameed ◽  
...  

2018 ◽  
Vol 43 (4) ◽  
pp. 891 ◽  
Author(s):  
Ahmmed A. Rifat ◽  
Firoz haider ◽  
Rajib Ahmed ◽  
Ghafour Amouzad Mahdiraji ◽  
F. R. Mahamd Adikan ◽  
...  

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1587 ◽  
Author(s):  
Chen ◽  
Chang ◽  
Zhang ◽  
Zhou ◽  
Lu ◽  
...  

:A plasmonic sensor based on a dual-side polished photonic crystal fiber operating in a telecommunication wavelength range is proposed and investigated numerically by the finite element method (FEM). We study the effects of structural parameters on the sensor’s performance and analyze their tuning effects on loss spectra. As a result, two configurations are found when the analyte refractive index (RI) changes from 1.395 to 1.415. For configuration 1, an RI resolution of 9.39 × 10−6, an average wavelength sensitivity of 10,650 nm/RIU (the maximum wavelength sensitivity is 12,400 nm/RIU), an amplitude sensitivity of 252 RIU−1 and a linearity of 0.99692 are achieved. For configuration 2, the RI resolution, average wavelength sensitivity, amplitude sensitivity and linearity are 1.19 × 10−5, 8400 nm/RIU, 85 RIU−1 and 0.98246, respectively. The combination of both configurations can broaden the wavelength range for the sensing detection. Additionally, the sensor has a superior figure of merit (FOM) to a single-side polished design. The proposed sensor has a maximum wavelength sensitivity, amplitude sensitivity and RI resolution of the same order magnitude as that of existing sensors as well as higher linearity, which allows it to fulfill the requirements for modern sensing of being densely compact, amenable to integration, affordable and capable of remote sensing.


2021 ◽  
Vol 53 (8) ◽  
Author(s):  
Dhinakaran Vijayalakshmi ◽  
C. T. Manimegalai ◽  
Natesan Ayyanar ◽  
Truong Khang Nguyen ◽  
K. Kalimuthu

Photonics ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 40 ◽  
Author(s):  
Sohel Rana ◽  
Nirmala Kandadai ◽  
Harish Subbaraman

In this paper, a high sensitivity, polarization preserving photonic crystal fiber (PCF), based on circular air holes for sensing in the terahertz (THz) band, is presented. The finite element method, a practical and precise computational technique for describing the interactions between light and matter, is used to compute the modal properties of the designed fiber. For the designed PCF, comprising of circular air holes in both the cladding and in the porous core, a relative sensitivity of 73.5% and a high birefringence of 0.013 are achieved at 1.6 THz. The all circular air-hole structure, owing to its simplicity and compatibility with the current fiber draw technique for PCF fabrication, can be realized practically. It is anticipated that the designed fiber can be employed in applications such as detection of biological samples and toxic chemicals, imaging, and spectroscopy.


2012 ◽  
Vol 33 (1) ◽  
pp. 293-298 ◽  
Author(s):  
Dinish U. S. ◽  
Chit Yaw Fu ◽  
Kiat Seng Soh ◽  
Bhuvaneswari Ramaswamy ◽  
Anil Kumar ◽  
...  

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