Dr preeta Sharan

• Ph.D from IIT BHU, Post Doctorate from IIT Kharagpur
• Professor at Oxford Educational Institutions

This research aims to design and simulate photonic crystal micro pillar based cavity sensors by varying structural parameters and materials. Configurations studied are single cavity, dual cavity and tri-cavity. Parameters Evaluated are radius 0.14 μm to 0.2 μm and lattice constant 0.9 μm to 0.96 μm. The material used for investigation is Gallium Ar...

To protect secrecy without compromising data, the study outlines a strong security framework for communications between mobile devices and servers and recommends encryption as the best option. Traditional encryption techniques are not immediately transferable due to the limitations of e-health data, including its size, redundancy, and bandwidth esp...

Rail wheel contact measurement is crucial for several reasons. First and foremost, it directly affects the safety of passengers, crew, and the general public. Accurate measurements help identify irregularities in wheel-rail contact, such as wheel defects, wear, or track anomalies, which can lead to derailments or accidents if left unaddressed. An i...

Security remains a critical concern in today's world, especially for protecting high-value assets and vital infrastructure such as refineries, petrochemical plants, government facilities, and military installations. Traditional security measures often fall short against increasingly sophisticated threats. To meet these challenges, perimeter intrusi...

Localized Surface plasmon-based sensors offer distinct advantages over traditional Surface Plasmon resonance-based sensors due to their enhanced sensitivity. Silver-TiO2 is chosen as the material composition for the LSPR-based sensor due to its higher precision, high chemical stability, low cost, and environmental friendliness which is ideal for op...

Cancer cell detection is critical to early diagnosis and treatment, aiming to improve patient outcomes through timely interventions. One promising approach involves using Fiber Bragg Grating (FBG) sensors due to their high sensitivity, biocompatibility, and ability to operate in real time. Due to the blood's refractive index, the wavelength shift i...

Cancer remains a significant health concern affecting many people globally. Recognizing the importance of early identification and treatment of thyroid cancer, we have developed a novel detection method utilizing supervised Machine Learning (ML) techniques, specifically Logistic Regression (LOR) and Artificial Neural Networks (ANN). Our approach le...

A cutting-edge method for monitoring the state of railway infrastructure is the combination of the Internet of Things (IoT) with Fiber Bragg Grating (FBG) sensors for railway health monitoring. Rail wheel contact temperature monitoring relies heavily on precise and timely parameter sensing because these components are subject to a wide range of sit...

Surface plasmon resonance (SPR) biosensors have become crucial in biochemistry and biophysics due to their high sensitivity in detecting biomolecular interactions. These sensors operate by monitoring changes in the refractive index near metal surfaces, typically gold or silver. This review outlines the evolution of SPR technology, from early observ...

Optical fiber Bragg grating (FBG) sensors have advanced significantly in the last several years. The use of innovative FBG in temperature and pressure measurement is examined in this study. The benefits of FBGs, such as their compact size, low weight, resilience to corrosion, immunity to electromagnetic interference, distributed sensing, and remote...

Localized Surface plasmon-based sensors offer distinct advantages over traditional Surface Plasmon resonance based sensors due to their enhanced sensitivity. Silver-TiO2 is chosen as the material composition for the LSPR-based sensor due to its higher precision, high chemical stability, low cost, and environmental friendliness which is ideal fo...

One of the diagnostic tool for clinical evaluation and disease diagnosis is a pulse waveform analysis. High fidelity radial artery pulse waveforms have been investigated in clinical research to compute central aortic pressure, which has been demonstrated to be predictive of cardiovascular diseases. The radial artery must be inspected from several a...

This research presents a comprehensive study focused on the design, implementation, and analysis of an innovative fiber Bragg grating (FBG) based foot pressure assessment system. FBG sensors strategically placed on the great toe, metatarsal 1, metatarsal 2, and heel provided distinct peak resonant wavelengths, strains, and pressures during experime...

The broad range of sexually transmitted viruses are infections generally attained through uncertain sexual contact and can lead to serious health complications or may result in death if not diagnosed earlier. In this work, a Biosensor based on two-dimensional (2D) photonic crystal structures is proposed and integrated with Machine learning performa...

This research encompasses a comprehensive study on the application of 1D photonic crystal-based detection in the context of infectious diseases, specifically targeting malaria stages, chikungunya, and dengue. It explores the interactions between the photonic crystal and various biomolecules associated with these diseases, with a focus on platelets,...

The major objective of this research is to estimate the effects of temperature on tapered roller bearings through the investigation of strain and thermal behaviors. Autodesk Fusion 360 is chosen to design the geometry in the manner specified and employing ANSYS Workbench to perform Finite Element Analysis. The stresses between the roller, interior,...

The Indian railway traffic is increasing and is expected to increase more in the future, thus making safety a critical issue to focus on. However, there is very little work on smart monitoring with respect to railway infrastructure in India. This paper analyses this problem and proposes an optical sensor-based smart monitoring solution for railways...

Fibre Bragg grating sensors are investigated in various structural health monitoring systems. Most of these research used a variety of FBG sensors to assess the structures' temperature and strain. The FBG sensor is combined with two fixed and cantilever beam structures in the proposed study. A wide range of pressure and temperature are considered d...

Gold and silver are the two notable noble metals with wide implications in surface plasmon resonance (SPR) based sensors. Gold possesses a superior SPR phenomenon compared to silver, however, with extremely high costs. To resolve this problem, the current study proposes a new gold–free SPR biosensor design employing silver as the noble metal for ef...

A key role of the World Health Organisation is improving the proportion of patients with early cancer diagnosis. Due to the high rates of mortality and recurrence, the treatment process requires several months and is very expensive. Over the years, advancements in computer engineering and optical field communication have inspired numerous scholars...

The new concept to measure snowfall and sophistication examines the relationship of the Technological Coefficient (T); the variables are grouped into three dimensions: Education and training, snowfall; and institutional strength. The analyzed population corresponds to 116 countries. 158 variables per country were collected for ten years. For the an...

In the proposed work, a defect cavity multi-layer Bragg reflector structure is proposed theoretically to find the presence of thyroid cancer cells in the given sample. The modelling, design and analysis of the sensor is performed using characteristic matrix method (CMM). Proposed structure has central defect cavity with 6 pairs of low and high...

With the increasing Urban population, the need for Internet of Things (IoT) based smart city applications, such as monitoring manhole covers (MC), becomes crucial. However, current MC monitoring systems lack full automation, have a short lifespan, and face design challenges from an IoT device perspective. In this study, we explore the use of compre...

In this study, a gallium arsenide (GaAs) composite semi-conductive material is used as rods with an air background lattice point as a photonic crystal for the detection of diabetes using urine, blood, and tear samples. The refractive index (RI) of bio-samples at various concentrations is used to determine the interaction between light and analyte....

Railway and train condition monitoring are two critical components in assuring passenger safety and comfort during their journey. In this work, a new laboratory downscale rail test rig has been designed and developed for exploring rail-wheel interaction and axle peak detection using fiber Bragg grating (FBG) optical sensors. This paper describes th...

In the proposed work we designed and analysed a two-dimensional photonic crystal based sensor for three different biosensing applications, including measuring the normal and abnormal levels of uric acid, glucose, and creatinine in the blood. We examine the sensitivity, Q factor, and wavelength shift of two different types of sensor cavity design. T...

In this work, a highly sensitive hydrostatic pressure sensor using one-dimensional (1D) photonic-crystal (PC) is designed and analyzed numerically for its sensing performance. The device design has silicon (Si) sensing layer at the top to sense the applied pressure. The proposed sensor performance has been studied for its pressure sensing, by apply...

The present study introduces a highly sensitive bimetallic SPR biosensor based on metal nitride for efficient urine glucose detection. Using a BK-7 prism, Au (25 nm), Ag (25nm), AlN (15 nm), and a biosample (urine) layer, the proposed sensor comprises of five layers. The selection of the sequence and dimensions of both metal layers is based on thei...

A theoretical investigation of multi-layer Bragg Reflector (BR) structure to design highly sensitive temperature sensor is proposed to measure the temperature over a wide range. Characteristic-Matrix (CM) mathematical tool is used to design and analyse the proposed temperature sensor. A 1D Distributed Bragg Reflector multi-layer structure is used t...

This paper presents a multi-layered Kretschmann configuration-based Surface Plasmon Resonance (SPR) biosensor for the detection of urine glucose. The modelling, simulation, and analysis have been done by using Silver (Ag) and Gold (Au) layer on the low refractive index prism BK-7 separately, which created two structures: structure-I (BK7/Ag/Bio-sam...

This work includes the design and simulation of optical fiber as strain sensor to measure equivalent elastic strain generated on the rail due to the load of the train wagon at different speeds when train passes over it. It presents a behavioural study of maximum elastic strain and von Mises stress due to wheel-rail contact of a freight train with v...

Current CMOS (Complementary metal–oxide–semiconductor) technology is no longer constrained in scaling by short channel effects. The semiconductor industry has developed a number of substitute technologies, including quantum-dot cellular automata, to get around these restrictions (QCA). In this study, a novel technique for developing digital differe...

In this article we proposed a one-dimensional (1D) silicon photonic-crystal (PC) as a highly sensitive pressure sensor to measure the applied hydrostatic pressure. A 1D flexible silicon layer is formed at the top of the proposed structure. The proposed sensor is designed to measure the low pressure in the range of 10kpa to 20kpa. An FEM tool Comsol...

Photonic crystal add–drop filter structures are promising technology for optical communication networks. This paper presents the design of H-shaped photonic crystal add–drop filter that consists of one straight waveguide and four arm waveguides. A ring resonator-based add–drop filter has been proposed with upper and lower waveguides for light propa...

Railways has huge network of trains which carries passenger and goods from one place to another. With increase in population, demand of railway transport is increasing day by day. Real challenge comes in continuous monitoring of train parameters such as axle count, weight of wagon, speeds etc. In this work, FEA (finite element analysis) is implemen...

This study ponders the prospect of a Plasmon enabled optical memory device to achieve higher data transfer rates and data density. The device is based upon Silicon as a substrate, Silver metal and Silicon nitride sandwiched between them. Paper discusses simulation based excitation analysis of two design variations of a memory device labelled device...

Quantum Dot Cellular Automata (QCA) technology is gaining popularity for its low power requirements, high speed and efficient miniaturization of digital circuits. Especially, digital circuits now need to be realized and investigated at quantum levels. The manuscript presents the design of several combinational and sequential logic circuits by emplo...

The strain sensing action of a photonic integrated microcantilever induced by the binding of biomolecules such as antibodies and antigens is an important factor in biosensing applications. Since sensitivity is the key factor in sensor performance for early detection of any bio analyte, increasing the sensitivity of the photonic integrated microcant...

Innovative Computing for Green Technologies aims to introduce the latest technologies and promote international collaborations across the scientific community and, eventually, the general public. It consists of 3 sections. Each section explores how technologies give real-time responses to current environmental, technological, social and economic ch...

This paper describes the measure of compactness using finite element analysis and stress–strain characteristics of freight wagon considering loaded and unloaded condition of wagon weight. Freight train wagons are used to carry various goods from one part to other parts of country. In terms of preserving the originality of the contact load transfer,...

The mounting demands for superior data processing and data storage due to the rapid growth in data analytics has led a new direction towards optical data computation and storage technology. Towards this endeavor, we have designed and simulated a Mach-Zhender interferometer based optical waveguide structure to store optical information. The simulate...

Brushless DC (BLDC) Motors are attracting considerable interest from robotics industry for most of the last decade. They are highly durable and weightless than other devices with approximately equal power outputs, and they are ideal for high-speed robotic applications This chapter presents a design and performance analysis of two outer rotor BLDC m...

Wheel flats are a key source of issues in railway systems, as they generate significant wear on both the infrastructure and the train carriages. Flat zones on the wheel tread are created by the wheel sliding unintentionally on the rail. They can cause serious damage to the train and accidents, so identifying worn wheels is critical for human safety...

In this proposed work, a plasmonic biosensor based on graphene has been presented to detect the biosample consisting of urine glucose. The proposed biosensor is comprised of five layers in the order of prism/Au/Si/graphene-sensing medium. P-polarized monochromatic light of 633 nm has been used for the excitation of the plasmons at the metal–semicon...

The goal of the proposed work is to design and analyze a low temperature sensor to measure cryogenic temperature in the range of 0–120 K. Proposed sensor design uses Distributed Bragg Reflector (DBR) multi-layer structure. DBR consists of high-low alternate dielectric materials arranged in one direction which acts as a one-dimensional photonic crys...

A completely novel Surface Plasmon Resonance (SPR) biosensor based on 2 D material Graphene and Transition Metal Dichalcogenides (TMDC) WS2 (Tungsten disulfide) is proposed for the detection of the urine glucose concentration levels. This proposed structure is comprised of the five-layered in the order of the Prism- Au-Graphene-WS2-Biosample. Bio...

A novel, to the best of our knowledge, optimized structure is proposed to enhance the sensitivity of a surface plasmon resonance (SPR)-based biosensor for urine glucose detection by adding a few layers of black phosphorous (BP) (two-dimensional material) over the zinc oxide (ZnO) sandwiched in between gold (Au) and silver (Ag) bimetallic layers. Re...

This study presented an overview of current developments in optical micro-electromechanical systems in biomedical applications. Optical micro-electromechanical system (MEMS) is a particular class of MEMS technology. It combines micro-optics, mechanical elements, and electronics, called the micro-opto electromechanical system (MOEMS). Optical MEMS c...

The Coronavirus pandemic and the work-from-anywhere has created a shift toward cloud-based services. The pandemic is causing an explosion in cloud migration, expected that by 2025, 95% of workloads will live in the cloud. One of the challenges of the cloud is data security. It is the responsibility of cloud service providers to protect user data fr...

The Coronavirus pandemic and the work-from-anywhere has created a shift toward cloud-based services. The pandemic is causing an explosion in cloud migration, expected that by 2025, 95% of workloads will live in the cloud. One of the challenges of the cloud is data security. It is the responsibility of cloud service providers to protect user data fr...

When there is stress on the eardrum because of a change in air pressure is known as Barotrauma. If there is excessive pressure than 20KPa, damage to the eardrum may occur. During air travel, Barotrauma can occur due to pressure differences at high altitudes. This paper presented a MOEMS based pressure sensor using Photonic Crystal. Two variants of...

The proposed work consists of a ring resonator-based pressure sensor. Double and triple ring photonic crystal resonators are configured in series and in parallel combinations. The sensing layer is designed and simulated for a varying pressure of 3–9 MPa using ansys workbench to obtain the stress and deformation experienced by the sensor. The equiva...

In the present paper, the design and simulation of a surface plasmon resonance (SPR) Sensor for better sensitivity performance by employing a thin layer of barium titanate (BaTiO3) has been presented. The proposed biosensor is comprised of layers in the following order: Prism–Ag–SiO2/BaTiO3–Au–Analyte. Urine Sample with different glucose levels is...

The QCA is an upcoming and innovative concept which exist in the scope of nanoscale with an estimated range of less than 18nm so as to help the design and implementation of the applications in nano range. The reversible logic concept is acquiring wide significance as a logical configuration style for current nanotechnology and quantum. In order to...

In the proposed work, a multi-layered Distributed Bragg’s Reflector (DBR) Fabry Perot Microcavity resonator is proposed theoretically to sense bio-analyte. One dimensional Photonic-Crystal (PhC) sensor is designed and analysed to sense the presence of oral cancerous cells in the analyte. The Characteristic Matrix Method (CMM) is used to design, mod...

The need for improved safety, reliability and efficiency is one of the most important aspects of the railway industry worldwide. Optical sensors can be used in smart condition monitoring system that can allow real time and continuous monitoring of the structural and operational conditions of trains. Railway monitoring is carried by the use of Fiber...

We explored the design of an optical pressure sensor. The objective is to create a photonic microelectromechanical system-based cantilever sensor design to detect prostate-specific antigen, a protein biomarker associated with prostate cancer. Sensor’s performance for the early detection of cancerous cells is dependent on sensitivity. The designed s...

Dielectrophoresis [DEP] is a process which results due to the particle movement in a non-uniform electric field as there is a continuous interaction of particle dipole and spatial gradient of electric field. Dielectrophoresis is one of the commonly used methods for the particle manipulation in microfluidic devices. DEP is used in the separation of...

Proposed work involves the development of algorithm and computer simulation of a Hexagonal Ring Structure-based photonic sensor for the detection of harmful water impurities. An optical sensor ring structure is used to detect impurities such as Lead, DDT, Chlorine, PCB, Arsenic, Mercury, Fluoride, Aluminum. A comparison between two types of sensing...

The Exploration of the ocean with sound waves submarines, object tracking, bed deposits, and ocean communications requires a high sensitive hydroacoustic pressure sensor. Design of highly sensitive hydroacoustic challenges and needs of the present scenario. Proposed work involves the design and development of fiber Bragg grating hydroacoustic press...

Proposed work consist of simple and micro size optical MEMS based displacement sensor for detection of muscle movement in human body. Optical MEMS based structure, analyzed with rods-in air and hole-in slab configuration of photonic crystal. Remarkable shift in wavelength is observed in RIA configuration with high quality factor of 3245 compare to...

This paper presents a performance analysis of different microcantilever shapes integrated with the optical MEMS system in different fluid mediums. Microcantilevers such as rectangular, trapezoidal, and triangle profile are coupled with optical sensing layers. Here, the concept of integration of optical sensing layer with different shapes of microca...

With the development of the technology, the researchers have started exploring the domain of reversible logic based computing in correlation with the nano scaling dimensions of the processors. The reversible logic based design and implementation of the circuits in correlation with QCA has emerged as the area of thrust for developing systems with de...

The Bacillus cereus or B. cereus group comprises genetically closely related species with variable toxigenic characteristics. Most human food poisoning is caused by B. cereus. B. cereus is associated with nosocomial and opportunistic infections, particularly in immunocompromised patients. The motivation for this work was to provide an alternate met...

In this paper, we present a novel microcantilever sensor for early detection of cancer in human body using an integrated optical micro ring resonator. Effect of geometrical modification of microcantilever on sensitivity and quality factor of proposed sensor is investigated. Regular rectangular and triangular profile are the two types of microcantil...

In this paper,five layeredSurface Plasmon Resonance (SPR) based optical biosensor has been designed for the detection of sugar concentration level in human body. For accuracy and sensitivity measurement here metamaterial and silica has been considered in the third layer for two different structure, respectively. Considering the advantages of except...