scholarly journals Modal Interferometers Based on a Tapered Special Photonic Crystal Fiber for Highly Sensitive Detection

2019 ◽  
Author(s):  
Vladimir (or Uladzimir) P. Minkovich ◽  
Joel Villatoro ◽  
Pavel V. Minkovich
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Sensitive Detection ◽  
Crystal Fiber ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

scholarly journals Research on Dual-Channel and Dual-core Plasmonic Sensor Based Photonic Crystal Fiber for Refractive Index Sensing

2021 ◽  
Author(s):  
Shenxi Jiao ◽  
Xiaolei Ren ◽  
Hanrui Yang ◽  
Shibo Xu
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Biomedical Analysis ◽  
Crystal Fiber ◽  
Dual Channel ◽  
Highly Sensitive ◽  
Left And Right ◽  
Highly Sensitive Detection ◽  
Dual Core

Abstract A dual-core photonic crystal fiber (PCF) with dual-channel based surface plasmon resonance (SPR) sensor is designed. The silver and gold films are severally coated in the inner walls of two large ring detection channels to excite the plasmon modes, which can make the designed sensor achieve the dual-channel sensing. The effect of structure parameters on the sensing properties and loss spectrum is numerically analyzed by finite element method (FEM). When the analyte refractive index (RI) changes from 1.340 to 1.360, the average spectral sensitivities of 4280 and 3940 nm/RIU are obtained for the left and right channels, corresponding to the RI resolutions of 2.34×10-5 and 2.54×10-5 RIU, respectively. The simulation results suggest that the designed dual-channel sensor can realize highly sensitive detection of two analytes simultaneously, which has a wide application in the fields of biomedical analysis and environmental monitoring.

scholarly journals A Highly Sensitive, Polarization Maintaining Photonic Crystal Fiber Sensor Operating in the THz Regime

Photonics ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 40 ◽  
Author(s):  
Sohel Rana ◽  
Nirmala Kandadai ◽  
Harish Subbaraman
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
High Sensitivity ◽  
Relative Sensitivity ◽  
Computational Technique ◽  
The Finite Element Method ◽  
High Birefringence ◽  
Crystal Fiber ◽  
Highly Sensitive ◽  
Imaging And Spectroscopy

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.

Highly sensitive SERS detection of cancer proteins in low sample volume using hollow core photonic crystal fiber

2012 ◽  
Vol 33 (1) ◽  
pp. 293-298 ◽  
Author(s):  
Dinish U. S. ◽  
Chit Yaw Fu ◽  
Kiat Seng Soh ◽  
Bhuvaneswari Ramaswamy ◽  
Anil Kumar ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Sample Volume ◽  
Hollow Core ◽  
Crystal Fiber ◽  
Highly Sensitive ◽  
Sers Detection

A highly sensitive D-type photonic crystal fiber infrared sensor with indium tin oxide based on surface plasmon resonance

2021 ◽  
Author(s):  
Wei Liu ◽  
Chunjie Hu ◽  
Lei Zhou ◽  
Zao Yi ◽  
Ying Shi ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Surface Plasmon ◽  
Tin Oxide ◽  
Plasmon Resonance ◽  
Indium Tin Oxide ◽  
Type Structure ◽  
Crystal Fiber ◽  
Highly Sensitive

A highly sensitive surface plasmon resonance (SPR) sensor composed of a photonic crystal fiber (PCF) with the D-type structure is designed and analyzed by the full-vector finite element method (FEM). Indium tin oxide (ITO) is adopted as the plasmonic substance on account of the low cost and controllable infrared range (1500–2600 nm). By optimizing the structural parameters, the sensor shows a maximum wavelength sensitivity of 46,000 nm/RIU and average sensitivity of 13,166.67 nm/RIU for analyte refractive indexes between 1.355 and 1.385. This PCF combining a circular layout and D-type structure offers excellent sensitivity while the deposition and manufacturing complexity can be reduced. This sensor will possess an extremely expansive development space in the field of chemical analysis and environmental safety.

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
Keyword(s):  
Photonic Crystal ◽  
Comparative Study ◽  
Photonic Crystal Fiber ◽  
Structural Parameters ◽  
Simultaneous Detection ◽  
Plasmonic Sensor ◽  
Plasmonic Material ◽  
Sensor Performance ◽  
Crystal Fiber ◽  
Highly Sensitive

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.

scholarly journals Highly sensitive photonic crystal fiber salinity sensor based on Sagnac interferometer

2020 ◽  
Vol 16 ◽  
pp. 103022 ◽  
Author(s):  
Md. Aslam Mollah ◽  
Md. Yousufali ◽  
Md. Rifat Bin Asif Faysal ◽  
Md. Rabiul Hasan ◽  
Md. Biplob Hossain ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Sagnac Interferometer ◽  
Crystal Fiber ◽  
Highly Sensitive

Highly Sensitive Plasmonic Biosensor on Photonic Crystal Fiber

2019 ◽  
Author(s):  
Iffat Mahmud ◽  
Kamrun Nahar Shushama ◽  
Abdul Khaleque ◽  
Alok Kumar Paul ◽  
Sunjidah Hossain ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Crystal Fiber ◽  
Highly Sensitive

scholarly journals Helicity Enhanced Torsion Sensor Based on Liquid Filled Twisted Photonic Crystal Fibers

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1490
Author(s):  
Feng Zhang ◽  
Ying Wang ◽  
Zhiyong Bai ◽  
Shen Liu ◽  
Cailing Fu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Phase Matching ◽  
Core Mode ◽  
Crystal Fiber ◽  
Numerical Predictions ◽  
Highly Sensitive ◽  
Fiber Devices ◽  
Twist Rate ◽  
Crystal Fibers

A highly sensitive torsion sensor can be constructed by combining a twisted photonic crystal fiber with a liquid-filled waveguide in its air-hole cladding. The torsion sensitivity of this type of sensor is determined directly by the phase-matching conditions between the fiber core mode and the liquid waveguide mode, which can be improved by tuning the helicity (denoted by the initial twist rate, α0) of the twisted photonic crystal fiber. The enhancement mechanism of α0 on the sensitivity of the proposed torsion sensor is investigated theoretically, followed by experimental verifications, and a torsion sensitivity as high as 446 nm∙mm∙rad−1 can be obtained by tailoring these parameters. Experimental results show that the torsion sensitivity increases with α0 decreasing from 3.142 to 3.925 rad/mm, which are in consistence with that of the numerical predictions. The demonstrated torsion sensor is expected to contribute to the development of highly sensitive torsion-related photonic crystal fiber devices.

Highly sensitive photonic crystal fiber gas sensor

Optik ◽  
2019 ◽  
Vol 188 ◽  
pp. 78-86 ◽  
Author(s):  
Ahmed Saber H. Rabee ◽  
Mohamed Farhat O. Hameed ◽  
Ahmed M. Heikal ◽  
S.S.A. Obayya
Keyword(s):  
Photonic Crystal ◽  
Gas Sensor ◽  
Photonic Crystal Fiber ◽  
Crystal Fiber ◽  
Highly Sensitive
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