scholarly journals Detection of Reproductive Hormones in Females by Using 1D Photonic Crystal-Based Simple Reconfigurable Biosensing Design

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1533
Author(s):  
Arafa Aly ◽  
S. Awasthi ◽  
A. Mohamed ◽  
Z. Matar ◽  
M. Mohaseb ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Incident Angle ◽  
Defect Mode ◽  
High Sensitivity ◽  
Reproductive Hormones ◽  
Buffer Layers ◽  
Angle Of Incidence ◽  
Blood Samples ◽  
Sensing Applications ◽  
1D Photonic Crystal

In this manuscript, we have explored the photonic biosensing application of the 1D photonic crystal (PhC) (AB)NCDC(AB)N, which is capable of detecting reproductive progesterone and estradiol hormones of different concentration levels in blood samples of females. The proposed structure is composed of an air cavity surrounded by two buffer layers of material MgF2, which is sandwiched between two identical 1D sub PhCs (AB)N. Both sub PhCs are made up of alternate layers of materials, SiO2 and Si, of period 5. MATLAB software has been used to obtain transmission characteristics of the structure corresponding TE wave, only with the help of the transfer matrix method. The mainstay of this research is focused on the dependence of the intensity and position of the defect mode inside the photonic bandgap with respect to reproductive hormone concentrations in blood samples, change in the thickness of the cavity region and change in angle of incidence corresponding to TE wave only. The proposed design shows high sensitivity of 98.92 nm/nmol/L and 96.58 nm/nmol/L when the cavity of a thickness of 340 nm is loaded with progesterone and estradiol hormones of concentrations of 80 nmol/L and 11 nmol/L, respectively, at an incident angle of 20°. Apart from sensitivity, other parameters such as quality factor and figure of merit have also been computed to gain deep insight about the sensing capabilities of the proposed design. These findings may pave the path for the design and development of various sensing devices capable of detecting gynecological problems pertaining to reproductive hormones in females. Thus, the simple design and excellent performance makes our design most efficient and suitable for sensing applications in industrial and biomedical fields.

1D reconfigurable bistable photonic device composed of phase change material for detection of reproductive female hormones

2021 ◽  
Vol 96 (12) ◽  
pp. 125533
Author(s):  
Arafa H Aly ◽  
S K Awasthi ◽  
Asmaa M. Mohamed ◽  
M. Al-Dossari ◽  
Z. S. Matar ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Visible Region ◽  
Reproductive Hormones ◽  
Buffer Layers ◽  
Electromagnetic Spectrum ◽  
Angle Of Incidence ◽  
Reproductive Process ◽  
Sensing Applications ◽  
Change Material

Abstract In this manuscript one-dimensional (1D) photonic biosensor (PQ) N GDG(PQ) N composed of phase change material (PCM) germanium antimony telluride (GST) has been studied in visible region of electromagnetic spectrum. This design is capable of label free recognition of reproductive hormones of female which are significant during reproductive process such as menstruation and parturition. The proposed structure is composed of an air cavity separated by two buffer layers of GST material. The GST buffer layers have been used to improve the sensing performance of the structure. The modified cavity associated with buffer GST layers is sandwiched between two 1D photonic structures (PS) (PQ) N . Both 1D PS are consisted of alternate material layers of SiO2 and Si of period 5. The transmission spectra of proposed design have been obtained by using transfer matrix method and MATLAB software. In this work the performance of the devise has been investigated for normal and oblique incidence corresponding to TE wave only under the influence of change of phases of GST. The mainstay of this research is focused on the tunable performance of proposed bio-sensing design due to switching between amorphous phase (aGST) and crystalline phase (cGST) of GST. Moreover how the change in the thickness of cavity region as well as angle of incidence corresponding to TE wave affects the performance of the design has also been studied. The sensitivity, quality factor and figure of merit values of the design have also been studied to get deep insight about the sensing capabilities of the proposed design under the influence of crystalline and amorphous phases of GST. Thus due to simple architecture and excellent switchable and reconfigurable characteristics, our structure works efficiently in industrial and biomedical refractive index based sensing applications.

Influence of incident angle on the defect mode of locally doped photonic crystal

2013 ◽  
Vol 34 (11) ◽  
pp. 112003 ◽  
Author(s):  
Jin Wang ◽  
Tingdun Wen ◽  
Liping Xu ◽  
Zufan Liu
Keyword(s):  
Photonic Crystal ◽  
Incident Angle ◽  
Defect Mode

scholarly journals Comparative Analysis of Highly Sensitive PCF for Chemical Sensing in THz Regime

2020 ◽  
Vol 12 (4) ◽  
pp. 94
Author(s):  
Mohammad Saiful Islam ◽  
Anwar Sadath ◽  
Md. Rakibul Islam ◽  
Mohammad Faisal
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Chemical Sensing ◽  
High Sensitivity ◽  
Confinement Loss ◽  
Core Diameter ◽  
Frequency Spectra ◽  
Crystal Fiber ◽  
Sensing Applications ◽  
Design Structure

Nowadays photonic crystal fiber (PCF) is used for sensing purposes in different fields. In this work, we have proposed a PCF based chemical (Benzene and Ethanol) sensor. Finite Element Method (FEM) based software COMSOL 5.3a is used to investigate the numerical characteristics for the proposed structure. From the numerical analysis, we obtained high sensitivity with low losses for an optimum core diameter of 210 µm. Our proposed PCF works on a broad range of core diameters and THz frequency spectra. The fabrication of this model is very simple due to its simplistic design structure. Full Text: PDF ReferencesMd.F.H. Arif, Md.J.H. Biddut, "A new structure of photonic crystal fiber with high sensitivity, high nonlinearity, high birefringence and low confinement loss for liquid analyte sensing applications", Sensing Bio-Sensing Res. 12, 8 (2017). CrossRef P. Kumar, Md.H. Bikash, K. Ahmed, S. Sen, "A Novel Hexahedron Photonic Crystal Fiber in Terahertz Propagation: Design and Analysis", Photonics 6(1), 32 (2019). CrossRef S. Asaduzzaman, K. Ahmed, T. Bhuiyan, T. Farah, "Hybrid photonic crystal fiber in chemical sensing", SpringerPlus 5, 748 (2016). CrossRef Md.S. Islam, J. Sultana, J. Atai, D. Abbott, S. Rana, M.R. Islam, "Ultra low-loss hybrid core porous fiber for broadband applications", App. Opt. 56(4), 1232 (2017). CrossRef S. Atakaramians, S. Afshar, H. Ebendorff-Heidepriem, M. Nagel, B.M. Fischer, D. Abbott, T.M. Monro, "THz porous fibers: design, fabrication and experimental characterization", Opt. Expr. 17(16), 14053 (2009). CrossRef

High tunability and sensitivity of 1D topological photonic crystal heterostructure

2021 ◽  
Author(s):  
Sayed Elshahat ◽  
Zain Elabdeen A. Mohamed ◽  
Mohamed Almokhtar ◽  
Cuicui Lu
Keyword(s):  
Photonic Crystal ◽  
Defect Mode ◽  
High Sensitivity ◽  
Edge State ◽  
Defect Layer ◽  
Glucose Sensing ◽  
Photonic Sensor ◽  
High Tunability ◽  
Interface Layers ◽  
Quality Factor Q

Abstract A modality to high tunability and sensing performance of one-dimensional (1D) topological photonic crystal (PC) heterostructure is realized based on a new mechanism through 1D topological PC. With inserting a defect aqueous layer as a sandwich between two 1D PCs, the transmittance gradually decreases with the increasing thickness of the defect layer. When the two layers of the topological heterostructure interface are replaced by the defect layer, the tunability, all sensing capabilities have been improved and the principle of topology is preserved. A topologically protected edge state is formed at the heterostructure interface with a highly localized electric field. For glucose sensing, high sensitivity S = 603.753 nm/RIU is obtained at the low detection limit of about DL = 1.22×10^(-4) RIU with high-quality factor Q = 2.33×10^4 and a high figure of merit FOM = 8147.814 RIU^(-1). Besides, the transmittance can be maintained more than 99% at low and/or high glucose concentrations, due to the coupling topological edge mode between defect mode and topological edge state. An excellent platform is examined for the design of a topological photonic sensor which is a flexible platform that can be used for any type of sensor solely by replacing the interface layers with the sensor materials. Thus, our results will promote the development of 1D topological photonic devices.

scholarly journals EFFECT OF A SUBWAVELENGTH LAYER ON ALL OPTICAL-DIODE ACTION IN 1D PHOTONIC CRYSTAL

2012 ◽  
Vol 15 ◽  
pp. 48-53 ◽  
Author(s):  
KAZEM JAMSHIDI-GHALEH ◽  
ZEINAB SAFARI
Keyword(s):  
Crystal Structure ◽  
Photonic Crystal ◽  
Layer Thickness ◽  
Optical Computing ◽  
Defect Mode ◽  
Photonic Crystal Structure ◽  
Optical Interconnection ◽  
All Optical ◽  
1D Photonic Crystal ◽  
Optical Diode

In this paper, the effect of a subwavelength layer thickness with positive-refractive index material on all-optical diode action in a one-dimensional photonic crystal structure is investigated. An asymmetric multilayer stack composed of Kerr-type nonlinear and linear dielectric media and a subwavelength layer is considered. Behaviour of the linear transmission defect mode and nonlinear optical bistabilities for normal incidence of wave to 1D photonic crystal structure from left and right sides are studied. It is demonstrated that, with increasing of the subwavelength layer thickness, the linear defect mode shifts to the lower frequencies. Also, the left to right one-way transmission property of the structure is changed for right to left transmission at some subwavelength layer thicknesses. The changes of lower and higher bistability intensities thresholds and difference between left to right and right to left nonlinear transmissions versus subwavelength layer thickness are graphically illustrated. The photonic crystal all-optical diode is one of the important integrated devices, which has potential applications in the field of optical computing, optical interconnection systems and integrated photonic circuits.

Electromagnetic density of modes in one-dimensional photonic crystals containing dispersive metamaterials

2018 ◽  
Vol 96 (11) ◽  
pp. 1224-1229
Author(s):  
Y. Sharma ◽  
S. Shukla ◽  
A. Aman ◽  
S. Prasad ◽  
V. Singh
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Transfer Matrix Method ◽  
Incident Angle ◽  
Structural Parameters ◽  
Angle Of Incidence ◽  
Relative Thickness ◽  
One Dimensional ◽  
Unit Cells ◽  
Frequency Regime

The electromagnetic density of modes (DOM) in a finite one-dimensional photonic crystal containing dispersive metamaterials is computed using Wigner’s time approach. The expression of DOM is derived using the transfer matrix method. Different structural parameters, such as relative thickness, incident angle, and total number of unit cells are varied and their effects are investigated. It is observed that relative thickness, angle of incidence, and total number of unit cells all play an important role in determining the properties of DOM depending on the frequency regime under consideration.

scholarly journals Enhancement the sensitivity of humidity sensor based on an agarose infiltration reflection-type photonic crystal fiber interferometer

2018 ◽  
Vol 15 (35) ◽  
pp. 83-91
Author(s):  
Hassan F. Hassan
Keyword(s):  
Photonic Crystal ◽  
Response Time ◽  
Photonic Crystal Fiber ◽  
Humidity Sensor ◽  
High Sensitivity ◽  
Single Mode ◽  
Clinical Situation ◽  
Single Mode Fiber ◽  
Crystal Fiber ◽  
Sensing Applications

Photonic Crystal Fiber Interferometers (PCFIs) are widely used for sensing applications. This work presents the fabrication and study the characterization of a relative humidity sensor based on a polymer-infiltrated photonic crystal fiber that operates in a Mach- Zehnder Interferometer (MZI) reflection mode. The fabrication of the sensor only involves splicing and cleaving Photonic Crystal Fiber (PCF) with Single Mode Fiber (SMF). A stub of (LMA-10) PCF spliced to SMF (Corning-28). In the splice regions. The PCFI sensor operation based on the adsorption and desorption of water vapour at the silica-air interface within the PCF. The sensor shows a high sensitivity to RH variations from (27% RH - 95% RH), with a change in its reflected power and the position of the interference peaks is found to be shifted that the interference pattern with a 100 nm span can be observed with high humidity sensitivity of (8.49 pm / %RH) is achieved with compact (4mm) PCF length . The sensor has the advantages for suitable for monitoring humidity in microenvironments. The repeatability, long-term stability, measurement accuracy. Wide humidity range. The response time of the sensor is found to be 1.4 sec for a change in RH of 50 %RH. The fast response time suggests that the sensor can potentially be used as a human breath rate monitor in a clinical situation.

scholarly journals Design of Cold Plasma Based Ternary Photonic Crystal for Microwave Applications

2021 ◽  
Author(s):  
Narendra Kumar ◽  
Sonu Kaliramna ◽  
Mahima Singh
Keyword(s):  
Photonic Crystal ◽  
High Frequency ◽  
Collision Frequency ◽  
Angle Of Incidence ◽  
Photonic Bandgaps ◽  
Frequency Spectra ◽  
Unit Cells ◽  
Ternary Photonic Crystal ◽  
1D Photonic Crystal ◽  
Transmission And Reflection

Abstract In this paper, we propose a Silicon/Plasma/Air ternary 1D photonic crystal, whose transmission and reflection properties have been studied. We draw the transmittance and reflectance versus frequency spectra in microwave region (GHz) for RHP Plasma based ternary PC by changing the angle of incidence for a fixed value of unit cells, magnetic field, layer thickness, collision frequency, and electron density. It is observed that with increase in angle of incidence, there is increase in photonic bandgap obtained in low and high frequency regions. With increase in angle, the photonic bandgaps shift towards higher frequencies. At angle 89° there are multiple sharp peaks of transmission are obtained. By comparing this ternary PC with a binary silicon/plasma PC, it is observed that this proposed PC has higher number of bands for smaller angles which makes them a good candidate for making multi-channel tunable filters, and for higher angle it behaves like broadband reflector. The proposed structure may also be a good candidate for many applications in making other microwave devices.

scholarly journals Remote Temperature Sensor Based on Tamm Resonance

2021 ◽  
Author(s):  
Zaky A. Zaky ◽  
Ashour M. Ahmed ◽  
Arafa Aly
Keyword(s):  
Photonic Crystal ◽  
Temperature Sensor ◽  
Signal To Noise Ratio ◽  
Incident Angle ◽  
High Sensitivity ◽  
Incident Radiation ◽  
High Signal ◽  
Crystal Unit Cell ◽  
Silicon Photonic ◽  
Highly Sensitive

Abstract A highly-sensitive remote temperature sensor based on Tamm resonance is proposed using a one-dimensional photonic crystal. The proposed structure is prism/Ag/Toluene/SiO2 /(PSi1/PSi2)N/Si. The transfer matrix method is used to discuss the interaction between the structure and the S-polarization of the incident radiation waves. We optimized the structure by studying the effect of the incident angle, the thickness of the first and second layers of the photonic crystal unit cell, the porosity of them, and the thickness of the toluene layer. High sensitivity, high signal-to-noise ratio, and very low resolution are achieved due to the coupling between the porous silicon photonic crystal properties and Tamm resonance that makes it very distinguished compared to previous works.

Sign in / Sign up

Export Citation Format

Share Document