Highly sensitive sensors using in-fiber gratings fabricated in photonic crystal nanostructures

2004 ◽  
Author(s):  
Yi Yang ◽  
Kun-Wook Chung ◽  
Shizhuo Yin ◽  
Karl Reichard ◽  
Zhiwen Liu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Fiber Gratings ◽  
Highly Sensitive ◽  
Highly Sensitive Sensors

scholarly journals Highly Sensitive Sensors Based on Photonic Crystal Fiber Modal Interferometers

2009 ◽  
Vol 2009 ◽  
pp. 1-11 ◽  
Author(s):  
Joel Villatoro ◽  
Vittoria Finazzi ◽  
Gonçal Badenes ◽  
Valerio Pruneri
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Thermal Sensitivity ◽  
Post Processing ◽  
Crystal Fiber ◽  
Sensing Applications ◽  
Highly Sensitive ◽  
Volatile Organic ◽  
Processing Techniques ◽  
Highly Sensitive Sensors

We review the research on photonic crystal fiber modal interferometers with emphasis placed on the characteristics that make them attractive for different sensing applications. The fabrication of such interferometers is carried out with different post-processing techniques such as grating inscription, tapering or cleaving, and splicing. In general photonic crystal fiber interferometers exhibit low thermal sensitivity while their applications range from sensing strain or temperature to refractive index and volatile organic compounds.

scholarly journals Long period fiber gratings written in photonic crystal fibers by use of CO2 laser

2013 ◽  
Vol 3 (3) ◽  
pp. 193-201 ◽  
Author(s):  
Yiping Wang ◽  
Changrui Liao ◽  
Xiaoyong Zhong ◽  
Jiangtao Zhou ◽  
Yingjie Liu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Co2 Laser ◽  
Photonic Crystal Fibers ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings ◽  
Crystal Fibers

scholarly journals Elongated-Hexagonal Photonic Crystal for Buffering, Sensing, and Modulation

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 809
Author(s):  
Sayed Elshahat ◽  
Israa Abood ◽  
Zixian Liang ◽  
Jihong Pei ◽  
Zhengbiao Ouyang
Keyword(s):  
Photonic Crystal ◽  
Irregular Waveguide ◽  
Optical Confinement ◽  
Physical Size ◽  
External Voltage ◽  
Dynamic Modulation ◽  
Highly Sensitive ◽  
Matter Interaction ◽  
Light Matter Interaction ◽  
Higher Sensitivity

A paradigm for high buffering performance with an essential fulfillment for sensing and modulation was set forth. Through substituting the fundamental two rows of air holes in an elongated hexagonal photonic crystal (E-PhC) by one row of the triangular gaps, the EPCW is molded to form an irregular waveguide. By properly adjusting the triangle dimension solitary, we fulfilled the lowest favorable value of the physical-size of each stored bit by about μ5.5510 μm. Besides, the EPCW is highly sensitive to refractive index (RI) perturbation attributed to the medium through infiltrating the triangular gaps inside the EPCW by microfluid with high RI sensitivity of about 379.87 nm/RIU. Furthermore, dynamic modulation can be achieved by applying external voltage and high electro-optical (EO) sensitivity is obtained of about 748.407 nm/RIU. The higher sensitivity is attributable to strong optical confinement in the waveguide region and enhanced light-matter interaction in the region of the microfluid triangular gaps inside the EPCW and conventional gaps (air holes). The EPCW structure enhances the interaction between the light and the sensing medium.

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.

scholarly journals Immunosensor Based on Long-Period Fiber Gratings for Detection of Viruses Causing Gastroenteritis

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 813 ◽  
Author(s):  
Marta Janczuk-Richter ◽  
Beata Gromadzka ◽  
Łukasz Richter ◽  
Mirosława Panasiuk ◽  
Karolina Zimmer ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Medical Diagnostics ◽  
Label Free ◽  
Fiber Gratings ◽  
Fast Detection ◽  
Long Period ◽  
Highly Sensitive ◽  
Protein Receptors ◽  
Long Period Fiber Gratings ◽  
Vaccine Testing

Since the norovirus is the main cause of acute gastroenteritis all over the world, its fast detection is crucial in medical diagnostics. In this work, a rapid, sensitive, and selective optical fiber biosensor for the detection of norovirus virus-like particles (VLPs) is reported. The sensor is based on highly sensitive long-period fiber gratings (LPFGs) coated with antibodies against the main coat protein of the norovirus. Several modification methods were verified to obtain reliable immobilization of protein receptors on the LPFG surface. We were able to detect 1 ng/mL norovirus VLPs in a 40-min assay in a label-free manner. Thanks to the application of an optical fiber as the sensor, there is a possibility to increase the user’s safety by separating the measurement point from the signal processing setup. Moreover, our sensor is small and light, and the proposed assay is straightforward. The designed LPFG-based biosensor could be applied in both fast norovirus detection and in vaccine testing.

Long period fiber gratings written in photonic crystal fibers by CO2laser

2013 ◽  
Author(s):  
Yiping Wang ◽  
Wei Jin ◽  
Dongning Wang ◽  
Changrui Liao ◽  
Xiaoyong Zhong ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fibers ◽  
Fiber Gratings ◽  
Long Period ◽  
Long Period Fiber Gratings ◽  
Crystal Fibers

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

scholarly journals Design A Sensor Mach Zender Interferometer for the Detection of Chemical and Organic Substances Present In Food and Health Drinks

2019 ◽  
Vol 8 (6) ◽  
pp. 4726-4730
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Model Simulation ◽  
Soft Drink ◽  
Cmos Technology ◽  
Experimental Program ◽  
Organic Substances ◽  
Highly Sensitive ◽  
Crystal Model ◽  
Small Change

This Paper includes the nano cavity implementation of the biosensors in the detection of any chemical analyte and pesticide. Chemical, organic substances or any biological analytes are deemed to be present in any food or soft drink. Detection of these kinds of analytes are the potential risk. Photonic Crystals are rapid and precise to reach the sky for the next future. The photonic crystal model simulation is performed using Beam Propagation technology, with change in the refractive index in one selected arm. Therefore the designed MZI acts as a bio sensing device to detect any kind of chemical, bio analyte and organic substances that are present in different food. MZI has many advantages in photonic crystal with the use of least instrument and ready to be compatible with CMOS technology. The experimental program is observed for minute change in refractive index, in this work. Mach Zender Interferometer shall behave as sensor for small change in refractive index of pesticide value and observed power and intensity thus will be accounted. Indicates that it is highly sensitive for the changes in refractive index and in turn it can differentiate between normal food which do not contain any chemical and pesticide present in food

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.

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