Santosh Kumar
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View article: Multichannel Wavelength-Selective All-Dielectric Metasurfaces Based on Complex Amplitude Modulation
Multichannel Wavelength-Selective All-Dielectric Metasurfaces Based on Complex Amplitude Modulation Open
The ability to independently manipulate the amplitude, phase, and polarization state of light constitutes a central problem in the advancement of integrated photonic devices. In this paper, we propose three multichannel wavelength-selectiv…
View article: Quantitative Detection of CD44-Expressing Cancer Cells Using Label-Free Optical Fiber Biosensors with Quasi-Random Interferometry
Quantitative Detection of CD44-Expressing Cancer Cells Using Label-Free Optical Fiber Biosensors with Quasi-Random Interferometry Open
Background: Circulating tumor cells (CTCs), key biomarkers in cancer progression and metastasis, hold significant value for early cancer detection as predictive and prognostic indicators. However, detecting and quantifying whole cells rema…
View article: LHC signals for a 2HDM with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msup> <mml:mi>Z</mml:mi> <mml:mo>′</mml:mo> </mml:msup> </mml:math> in a neutrinophilic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>U</mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:mn>1</mml:mn> <mml:mo stretchy="false">)</mml:mo> </mml:math> model
LHC signals for a 2HDM with in a neutrinophilic model Open
We consider a neutrinophilic U ( 1 ) extension of the Standard Model (SM) under which only a second Higgs doublet and SM singlet scalars and fermions are charged. The new gauge boson Z ′ couples to the SM minimally, generated by Z −…
View article: Multifaceted role of Iroquois signaling in development and diseases
Multifaceted role of Iroquois signaling in development and diseases Open
The Iroquois (Iro/Irx) gene family encodes transcription factors that belong to the Three-Amino-Acid Loop Extension-class homeodomain group, distinguished by a conserved Iro-box domain. Iroquois signaling is evolutionarily conserved from i…
View article: Development of plasmonic biosensor with tooth-shaped fiber and hybrid AuNPs–cubic silver oxide interface for ultrasensitive detection of gentamicin in real food samples
Development of plasmonic biosensor with tooth-shaped fiber and hybrid AuNPs–cubic silver oxide interface for ultrasensitive detection of gentamicin in real food samples Open
Gentamicin is an important pollutant in milk that causes harm to the human body. In this study, a plasmonic biosensor with a tapered multi-mode fiber (MMF) and four-core fiber (FCF) and multi-mode fiber (MMF) structure was developed. Local…
View article: Real-time phase demodulation method for heterodyne Φ-OTDR using single-sideband spectrum interception and rotated-vector-sum
Real-time phase demodulation method for heterodyne Φ-OTDR using single-sideband spectrum interception and rotated-vector-sum Open
To meet the real-time requirements of phase-sensitive optical time-domain reflectometry (Φ-OTDR) applications in practical scenarios, accelerating the Rayleigh backscattering (RBS) phase demodulation is necessary. Here, we propose what we …
View article: Multi-tapered optical fiber-based plasmonic biosensor with KMO nanoflowers and MWCNTs for highly sensitive detection of tetrodotoxin in real food samples
Multi-tapered optical fiber-based plasmonic biosensor with KMO nanoflowers and MWCNTs for highly sensitive detection of tetrodotoxin in real food samples Open
Tetrodotoxin (TTX) is a highly potent neurotoxin found in various marine and terrestrial organisms, including pufferfish, gastropods, blue-ringed octopuses, and amphibians. It blocks voltage-gated sodium channels on nerve cell membranes, i…
View article: Flexible optical waveguides for health: a review of the current status and technological perspectives
Flexible optical waveguides for health: a review of the current status and technological perspectives Open
In response to the increasing demand for the prevention and control of chronic noncommunicable diseases, people are paying growing attention to the application of flexible optical waveguides in health assistance, and the specific functions…
View article: The Surface-Topography Challenge: A Multi-Laboratory Benchmark Study to Advance the Characterization of Topography
The Surface-Topography Challenge: A Multi-Laboratory Benchmark Study to Advance the Characterization of Topography Open
View article: Performance Analysis of SPR Sensor Based on Tin Di‐selenide, Silicon and Lead Titanate for Malaria Detection
Performance Analysis of SPR Sensor Based on Tin Di‐selenide, Silicon and Lead Titanate for Malaria Detection Open
This paper introduces the design of a high‐performance Surface Plasmon Resonance (SPR) sensor using a SnSe 2 /Si/PbTiO 3 heterostructure for detecting malaria, targeting the different stages of the plasmodium parasite lifecycle. The Tin di…
View article: Multi Moire Networks in Engineered Lateral Hetero-Bilayers: Programmable Phononic Reconfiguration and Second Harmonic Generation
Multi Moire Networks in Engineered Lateral Hetero-Bilayers: Programmable Phononic Reconfiguration and Second Harmonic Generation Open
Moire engineering in two-dimensional transition metal dichalcogenides enables access to correlated quantum phenomena. Realizing such effects demands simultaneous control over twist angle and material composition to modulate phonons, excito…
View article: Spectral Envelope Analysis of Subwavelength Grating Waveguide Micro Racetrack Ring Resonator for Cancer Sensing Using Integrated Photonics
Spectral Envelope Analysis of Subwavelength Grating Waveguide Micro Racetrack Ring Resonator for Cancer Sensing Using Integrated Photonics Open
Silicon-on-Insulator (SOI) technology and optical resonators have significantly influenced the field of photonics for malignancy sensing. Cancer, a malignant disease, necessitates the precise and advanced diagnostic technique. This study i…
View article: Can LLMs Simulate Personas with Reversed Performance? A Benchmark for Counterfactual Instruction Following
Can LLMs Simulate Personas with Reversed Performance? A Benchmark for Counterfactual Instruction Following Open
Large Language Models (LLMs) are now increasingly widely used to simulate personas in virtual environments, leveraging their instruction-following capability. However, we discovered that even state-of-the-art LLMs cannot simulate personas …
View article: Structural and Dielectric Properties of Al-Doped ZnO Nanoparticles for High-Frequency Applications
Structural and Dielectric Properties of Al-Doped ZnO Nanoparticles for High-Frequency Applications Open
This study reports the synthesis of 5% Al-doped zinc oxide (ZnO) nanoparticles using the sol-gel method, followed by a comprehensive analysis of their structural and dielectric properties. X-ray diffraction (XRD) confirmed a hexagonal wurt…
View article: Advances in optical devices for the detection of contaminants in food and water
Advances in optical devices for the detection of contaminants in food and water Open
The detection of water and food contaminants is contributing to reach the Global Goals and the 2030 Agenda for Sustainable Development (especially Goal 2 “Zero hunger” and Goal 6 “Clean water and sanitation”: ensure availability and sustai…
View article: A Systematic Analysis on the Applications of AlGaN/GaN HEMT for High-Performance Sensing
A Systematic Analysis on the Applications of AlGaN/GaN HEMT for High-Performance Sensing Open
View article: <p>NO ABSOLUTE RIGHT TO BODY: A QUESTION OF SCRUTINY</p>
NO ABSOLUTE RIGHT TO BODY: A QUESTION OF SCRUTINY Open
View article: Emerging Role of 2-D Nanomaterials in the Design and Development of Optical Sensors: Mechanisms, Architectures, and Applications
Emerging Role of 2-D Nanomaterials in the Design and Development of Optical Sensors: Mechanisms, Architectures, and Applications Open
View article: Synergistic Integration of SPR With Photonic Crystal Fibers for Emerging Biosensing Strategies and Real-World Applications
Synergistic Integration of SPR With Photonic Crystal Fibers for Emerging Biosensing Strategies and Real-World Applications Open
View article: Unveiling the Potential of Zirconium-Based Metal-Organic Framework as an Efficient Adsorbent and DNA Binder
Unveiling the Potential of Zirconium-Based Metal-Organic Framework as an Efficient Adsorbent and DNA Binder Open
View article: Reduced Graphene Oxide-Based Broadband Photodetector for Silicon-Compatible Optical Sensing Application
Reduced Graphene Oxide-Based Broadband Photodetector for Silicon-Compatible Optical Sensing Application Open
View article: Microwave-Assisted Synthesis and Characterization of Iron Oxide Nanoparticles for Advanced Biomedical Sensing Applications
Microwave-Assisted Synthesis and Characterization of Iron Oxide Nanoparticles for Advanced Biomedical Sensing Applications Open
This study focuses on the synthesis and characterization of Superparamagnetic Iron Oxide Nanoparticles (IONPs) with potential biomedical and sensing applications. These nanoparticles are in high demand for their biocompatibility, biodegrad…
View article: Heart Rate Variability as a Noninvasive Sensor for Acute Mental Stress and Cardiac Abnormalities: Comparative Study
Heart Rate Variability as a Noninvasive Sensor for Acute Mental Stress and Cardiac Abnormalities: Comparative Study Open
View article: Design of a VDBA-Based Memristor Emulator and Its Application for Bio-Sensing Through Instrument Amplifier
Design of a VDBA-Based Memristor Emulator and Its Application for Bio-Sensing Through Instrument Amplifier Open
This study describes a VDBA (Voltage Differencing Buffered Amplifier)-based memristor emulator and its use in an instrumentation amplifier for biomedical applications. The proposed grounded and floating memristor has been implemented using…
View article: Ultra-Sensitive Fiber Optic LSPR Biosensor with Enhanced Enzyme Functionalization for Real-Time Putrescine Detection
Ultra-Sensitive Fiber Optic LSPR Biosensor with Enhanced Enzyme Functionalization for Real-Time Putrescine Detection Open
Putrescine is a kind of physical diamine that is closely related to food deterioration and food quality safety. This study employs a novel fiber optic biosensor based on S-tapered and waist extension techniques, as well as localized surfac…
View article: Large trion binding energy in monolayer WS$_2$ via strain-enhanced electron-phonon coupling
Large trion binding energy in monolayer WS$_2$ via strain-enhanced electron-phonon coupling Open
Transition metal dichalcogenides and related layered materials in their monolayer and a few layers thicknesses regime provide a promising optoelectronic platform for exploring the excitonic- and many-body physics. Strain engineering has em…
View article: Multimodal LSPR-enhanced crayfish-type optical fiber sensor for ultra-sensitive detection of <i>Shigella sonnei</i> using hybrid nanomaterials
Multimodal LSPR-enhanced crayfish-type optical fiber sensor for ultra-sensitive detection of <i>Shigella sonnei</i> using hybrid nanomaterials Open
This paper designs a biophotonic sensor that utilizes the localized surface plasmon resonance (LSPR) effect to detect Shigella sonnei (S. sonnei) with high sensitivity, featuring a novel crayfish-type optical fiber structure. Diseases and …
View article: Measurements of absolute bandgap deformation-potentials of optically-bright bilayer WSe$_2$
Measurements of absolute bandgap deformation-potentials of optically-bright bilayer WSe$_2$ Open
Bilayers of transition-metal dichalcogenides show many exciting features, including long-lived interlayer excitons and wide bandgap tunability using strain. Not many investigations on experimental determinations of deformation potentials r…
View article: Applications of machine learning to high temperature and high pressure environments: A literature review
Applications of machine learning to high temperature and high pressure environments: A literature review Open
In recent years, machine learning as a new style of calculation has been developed quickly, and because it can obtain results that experiments cannot achieve, it has become a useful calculation tool in the field of high temperature and hig…
View article: Detection of <i>Serratia marcescens</i> and <i>Mierococcus lysodeikticus</i> Bacterial Cells Using Cerium Oxide/Transition Metal Dichalcogenides Heterostructure‐Based Surface Plasmon Resonance Sensor
Detection of <i>Serratia marcescens</i> and <i>Mierococcus lysodeikticus</i> Bacterial Cells Using Cerium Oxide/Transition Metal Dichalcogenides Heterostructure‐Based Surface Plasmon Resonance Sensor Open
This article explores a novel surface plasmon resonance sensor for detecting the Serratia marcescens and Mierococcus lysodeikticus bacteria cells employing the cerium oxide (CeO 2 ) and transition metal dichalcogenides heterostructure. The…