Article
Chemistry, Multidisciplinary
Damian Pociecha, Natasa Vaupotic, Magdalena Majewska, Ewan Cruickshank, Rebecca Walker, John M. D. Storey, Corrie T. Imrie, Cheng Wang, Ewa Gorecka
Summary: Achiral mesogenic molecules can self-assemble into liquid crystalline smectic phases with simple or double-helical structures, exhibiting photonic bandgap phenomenon when the helix pitch is comparable to the wavelength of visible light during phase transition.
ADVANCED MATERIALS
(2021)
Article
Optics
Bingsen Huang, Xinzhi Sheng, Jiaqi Cao, Wei Gao, Shuqin Liou
Summary: This paper proposes and experimentally demonstrates a high sensitivity optical fiber twist sensor based on Suspend Core Fiber Sagnac Interference (SCFSI). By filling the air hole of the Suspend Core Fiber (SCF) with alcohol, the twist sensitivity of the sensor is greatly improved. The sensor also exhibits a capability of temperature calibration, making it suitable for structural health monitoring applications.
Article
Optics
Hasan Sarker, Mohammad Faisal, Md Aslam Mollah
Summary: This paper studies a novel photonic crystal fiber (PCF) based plasmonic biosensor with high sensitivity and performance using numerical methods. The sensor has a simple symmetrical design, is easy to fabricate, cost-effective, and offers higher sensitivity, making it suitable for various sensing applications and biochemical detection.
Article
Optics
Jianfu Wang, Suen Xin Chew, Shijie Song, Liwei LI, Linh Nguyen, Xiaoke Yi
Summary: In this study, cascaded silicon-on-insulator photonic crystal microring resonators (PhCMRRs) were designed, fabricated, and characterized for dual-parameter sensing based on a multiple resonances multiple modes (MRMM) technique. The engineered PhCMRRs, benefiting from the slow-light effect, exhibit unique optical field distributions with different sensitivities by exciting dielectric and air modes. The feasibility of simultaneous humidity and temperature extraction was demonstrated using a polymethyl methacrylate coating, and the sensitivities for relative humidity (RH) and temperature were obtained. Furthermore, the MRMM technique enriched the data and improved the sensor performance by enabling mutual cancellation of measurement errors.
Review
Computer Science, Information Systems
Nazmi A. Mohammed, Omar E. Khedr, El-Sayed M. El-Rabaie, Ashraf A. M. Khalaf
Summary: This review summarizes recent advances in sensors based on photonic crystal technologies for biomedical sensing applications. The unique characteristics, measurement techniques, and biosensing properties of different photonic crystal structures are discussed in detail. The review also covers manufacturing and functionally relevant properties, such as design simplicity, compactness, and multi-wavelength operation. Finally, novel trends in this field are briefly introduced.
Article
Engineering, Electrical & Electronic
Selahattin Cem Kilic, Serdar Kocaman
Summary: The designed silicon photonic crystal cavity biosensor configuration achieves high sensitivity and tunability through optimized design, with flexible tuning capabilities enabled by the highly dependent resonance characteristics on the gap size in the slot structure for efficient E-field confinement.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Yusuf Gamal, B. M. Younis, Salem F. Hegazy, Y. Badr, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: This paper presents a highly efficient multi-functional biosensor based on surface plasmon resonance (SPR) that can detect both refractive index (RI) and temperature with high sensitivity. By optimizing the geometric parameters of the structure, higher sensitivity is achieved in the same wavelength and temperature ranges as compared to recent sensors.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Fan Zhang, Beibei Qi, Baijin Su, Ou Xu, Yuwen Qin
Summary: We proposed and experimentally demonstrated an all-fiber sensor for measuring bend with high sensitivity based on a ring core fiber (RCF) modal interferometer. Due to the modal interferences in the structure, bending sensing can be realized by interrogating the intensity of the interference dip. Experimental results show a high bending sensitivity of -25.63 dB/m-1 in the range of 1.0954 m-1 to 1.4696 m-1.
CHINESE OPTICS LETTERS
(2023)
Article
Optics
Shidi Liu, Liang Zhang, Ming Tian, Tianyu Yang, Yuming Dong
Summary: This paper proposes a new type of broadband single-polarization single-mode hollow core anti-resonant photonic crystal fiber (HC-ARPCF) for polarization maintaining and high-power laser systems. By optimizing the design parameters, the fiber achieves SPSM behavior with a large loss difference, as well as a large effective mode area and near-zero dispersion properties across the entire operation bandwidth.
Article
Chemistry, Multidisciplinary
Daniel A. Paterson, Rebecca Walker, John M. D. Storey, Corrie T. Imrie
Summary: The liquid crystal dimers CB4OABX with various terminal substituents have been studied. By comparing their transitional properties with the dimers with different spacers, it is found that molecular curvature plays an important role in the formation of twist-bend nematic phase. Increasing molecular curvature increases both the melting point and N-TB phase stability, presenting a challenge in designing dimers with enantiotropic N-TB-I transitions.
Article
Engineering, Electrical & Electronic
Suoda Chu, K. Nakkeeran, Abdosllam M. Abobaker, Sumeet S. Aphale, S. Sivabalan, P. Ramesh Babu, K. Senthilnathan
Summary: This study investigates the sensing performance of a photonic crystal fiber sensor, adjusts the thickness of the analyte's binding layer to increase sensitivity, and expands the detection range.
IEEE SENSORS JOURNAL
(2021)
Article
Multidisciplinary Sciences
Arafa H. Aly, B. A. Mohamed, M. Al-Dossari, S. K. Awasthi, Emadelden Fouad, A. F. Amin
Summary: This work theoretically examines the ultra-high sensitive cancer cell detection capabilities of one-dimensional photonic crystal with defect. By changing the relevant parameters, it achieves high sensitivity detection of different cancer cell samples.
SCIENTIFIC REPORTS
(2023)
Article
Optics
Dongying Wang, Yang Yu, Zhechun Lu, Junbo Yang, Zao Yi, Qiang Bian, Jianfa Zhang, Shangpeng Qin, Junjie Weng, Siyu Yao, Yang Lu, Xiaoyang Hu, Zhou Meng
Summary: In this paper, a D-shaped photonic crystal fiber-surface plasmon resonance (PCF-SPR) sensor based on the magneto-refractive effect is proposed to improve the sensing performance of optical fiber magnetic field sensor. The sensor has a simple structure and high magnetic field sensitivity, making it a promising alternative platform for biosensors.
Article
Chemistry, Physical
Anant Kumar
Summary: This study computationally investigated a set of cyanobiphenyl dimers and found that the molecular structural features, including the bend angle and conformational distribution, are crucial for the appearance and stabilization of the twist-bend nematic phase. Only liquid crystal dimers with sufficiently bent molecular structures can exhibit the twist-bend nematic phase, and the phase transition temperatures are strongly influenced by changes in the molecular bend angle.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Optics
Xinyu Wang, Yu Wang, Qiang Ling, Qishuang Zhang, Weixuan Luo, Zhangwei Yu, Chenning Tao, Xiuli Jiang, Haiyun Chen, Zuguang Guan, Daru Chen
Summary: We have proposed and demonstrated a novel seven-core fiber (SCF) embedded ultra-long period grating (EU-LPFG) structure for curvature, torsion or temperature sensing. The EU-LPFG is fabricated by periodically splicing a SCF and a single mode fiber (SMF) using a fusion splicer and a microscope. It has high sensitivity and ability to measure curvature, torsion, and temperature in a compact structure, making it suitable for harsh environment applications.
OPTICS COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Moutusi De, Christos Markides, Vinod Kumar Singh, Christos Themistos, B. M. A. Rahman
Article
Engineering, Electrical & Electronic
Papiya Dhara, Vinod Kumar Singh
Summary: This study proposes a method using solid-core photonic crystal fiber as a temperature sensor, by filling the air-holes and changing the temperature to alter the refractive index of the analyte. The research results show that under certain conditions, as the temperature increases, the confinement loss gradually decreases.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2021)
Article
Nanoscience & Nanotechnology
Sugandha Das, Vinod Kumar Singh
Summary: A plasmonic refractive index sensor based on photonic crystal fiber with a chemically stable gold thin film and Ta2O5 overlayer is proposed. The sensor shows tunable analyte RI range, high sensitivity, and detection accuracy. Its design feasibility, low fabrication cost, and portability make it suitable for industrial and chemical sensing applications.
JOURNAL OF NANOPHOTONICS
(2021)
Article
Engineering, Electrical & Electronic
Moutusi De, Vinod Kumar Singh
Summary: This article presents an efficient high birefringent D-shaped photonic crystal fiber plasmonic refractive index sensor with high sensitivity and resolution, which is suitable for applications in various fields.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Akhilesh K. Pathak, Charusluk Viphavakit, B. M. A. Rahman, Vinod Kumar Singh
Summary: This study presents and analyzes a highly sensitive refractive index sensor based on a microfluidic channel and Ag-graphene composite nanowire, achieving maximum wavelength and amplitude sensitivity of 13700 nm/RIU and 1026 RIU-1. The sensor not only solves oxidation issues, but also enhances sensitivity, providing better performance than similar sensors. Additionally, the study thoroughly investigates the effects of various parameters on the sensor's performance, laying groundwork for the design of real-time, highly sensitive, remote sensing, and distributed SPR based RI sensor.
IEEE PHOTONICS JOURNAL
(2021)
Review
Engineering, Electrical & Electronic
Maya Chauhan, Vinod Kumar Singh
Summary: This review summarizes the numerical techniques used in simulations of optical fiber plasmonic sensors, focusing on contributions of different sensing structures and applications. The recent advancement in nano-optics has led to the development of susceptible optical devices using SPR/LSPR techniques with thin metal films and nanostructures.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Review
Engineering, Electrical & Electronic
Maya Chauhan, Vinod Kumar Singh
Summary: This article provides a brief overview of the development of plasmonic-based optical fiber analyte sensors over the last decade, focusing on the research on propagating surface plasmon resonance and localized surface plasmon resonance, as well as the recent advancements in nano-optics technology. The survey aims to offer valuable insights to researchers and students in understanding the trends and practical utility of optical fiber plasmonic sensors.
OPTICAL FIBER TECHNOLOGY
(2021)
Review
Nanoscience & Nanotechnology
Tulika Khanikar, Moutusi De, Vinod Kumar Singh
Summary: This paper discusses the development of fiber optic surface plasmon resonance sensors and their applications in liquid core SPR sensing. It covers the structure and sensing principles of MOFs, different fiber geometries, and strategies for enhancing detection. The current challenges and future directions of liquid infiltration-based MOF sensing technology are outlined.
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2021)
Article
Optics
Tulika Khanikar, Vinod Kumar Singh
Summary: A compact and ultra-convenient fiber optic surface plasmon resonance sensor is proposed, utilizing a V groove fiber. The sensor demonstrates high wavelength sensitivity, wide range of analyte detection, convenient design and fabrication, as well as competitive sensing performance.
Article
Optics
Maya Chauhan, Tulika Khanikar, Vinod Kumar Singh
Summary: In this paper, a fiber optic sensor for the detection of kerosene adulteration in petrol and diesel is proposed. The sensor utilizes a stimuli-responsive PDMS layer to detect the level of adulteration, providing selective and sensitive detection.
APPLIED PHYSICS B-LASERS AND OPTICS
(2022)
Article
Engineering, Electrical & Electronic
Sayan Kumar Nag, Tarun Kumar Gangopadhyay, John Paserba
Summary: Solar energy has emerged as an important source of nonconventional energy in the present century with a century-old tradition. The development of efficient photovoltaic (PV) cells becomes crucial as the demand for clean energy sources increases.
IEEE POWER & ENERGY MAGAZINE
(2022)
Article
Engineering, Electrical & Electronic
Maya Chauhan, Vinod Kumar Singh
Summary: The integration of optical fibers with nanostructured films deposition has created potential opportunities for novel optical sensors. A refractive index sensor based on ZnO coating over no-core fiber sensing region has shown superior sensing performance, with the highest average sensitivity of 799.42% / RIU for a wide range of refractive indices. The vertically oriented ZnO nanorods exhibit excellent characteristics such as large surface area, better crystallinity, and excellent adhesion, making them suitable for multipurpose chemical, physical, and biomedical sensing applications.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Multidisciplinary Sciences
Sayan Kumar Nag, Tarun Kumar Gangopadhyay
Summary: This paper outlines the concepts and design of a stand-alone solar photovoltaic system for a proposed business complex, including calculation of energy demand, prediction of solar panel numbers, estimation of optimal tilt angle, installation prediction, simulation testing, and cost estimation.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Tulika Khanikar, Vinod Kumar Singh
Summary: In this paper, a linear three hole microstructured optical fiber surface plasmon resonance sensor is proposed for temperature and refractive index (RI) detection. The sensor exhibits simple structure and competitive sensing performance, making it potentially useful for sensing high RI analytes in the petroleum and chemical industry and for magnetic field and temperature measurement.
