Article
Chemistry, Multidisciplinary
Salvatore Macis, Maria Chiara Paolozzi, Annalisa D'Arco, Federica Piccirilli, Veronica Stopponi, Marco Rossi, Fabio Moia, Andrea Toma, Stefano Lupi
Summary: This paper investigates the extraordinary optical transmittance effect in silicon nitride membranes patterned with micrometric holes, confirming the origin of the effect as phonon-polariton excitation. The study provides a novel light-matter interaction functionality for membrane technologies.
Article
Crystallography
Kaixiang Sun, Jiukai Fang, Yanpeng Shi, Shengnan Shi, Shan Zhang, Jinmei Song, Meiping Li, Xiaodong Wang, Fuhua Yang
Summary: This paper presents a structure for refractive index sensors in the terahertz band, utilizing enhanced extraordinary optical transmission to generate strong local electromagnetic field for sensing. Depending on the sensing position, the sensitivity can vary, with the highest being 51.56 GHz/RIU based on Mie scattering and the lowest being 5.13 GHz/RIU based on surface plasmon polaritons. The sensor is also capable of detecting the thickness of the analyte, with a minimum detectable height of 0.2 μm.
Article
Optics
Clement Deleau, Han Cheng Seat, Olivier Bernal, Frederic Surre
Summary: This Letter proposes a theoretical analysis and design methodology for integrated long period gratings (LPGs) in refractometric applications. A detailed parametric analysis is applied to a LPG model based on two strip waveguides to investigate the main design variables and their impact on refractometric performances, specifically spectral sensitivity and signature response. Simulations of four variants of the same LPG design using eigenmode expansion demonstrate a wide range of sensitivities up to 300,000 nm/RIU and figures of merit (FOMs) as high as 8000.
Article
Chemistry, Multidisciplinary
Jinmei Song, Yanpeng Shi, Meiping Li, Xiaoyu Liu, Xiaodong Wang, Fuhua Yang, Huayu Feng
Summary: By utilizing Mie resonance coupling effects, low-loss silicon particles can be used as receiving or transmitting antennas to localize the electromagnetic field in the terahertz region. This leads to enhanced extraordinary optical transmission (EEOT) when two silicon particles are symmetrically placed on both sides of subwavelength hole arrays. The proposed structure exhibits enhanced factors of 154 and 629 compared to the hole-only structure, and the Mie resonance coupling and induced THz EEOT can be adjusted over a wide frequency range.
NANOSCALE ADVANCES
(2022)
Article
Optics
Clement Deleau, Han Cheng Seat, Olivier Bernal, Frederic Surre
Summary: In this study, a high-sensitivity integrated silicon nitride long period grating (LPG) refractometer based on a rib waveguide with sinusoidally modulated width is demonstrated. The sensor exhibits a very high refractometric sensitivity that remains constant over a broad spectral range and also has low temperature sensitivity and a simple fabrication process. These results demonstrate the feasibility of achieving both high sensitivity and a large dynamic range of the proposed refractometer through chip-scale photonic integration.
PHOTONICS RESEARCH
(2022)
Article
Optics
Vicente A. Oliveira, Alexander C. Carneiro, Alexandre B. Dos Santos, Andres Pablo L. Barbero, Fernando C. Peixoto, Vinicius N. H. Silva
Summary: The article presents a method for measuring refractive index by reducing the diameter of single-mode optical fibers through a simple, practical, and low-cost mechanical polishing technique.
Article
Engineering, Electrical & Electronic
Sun Yuezhen, Yan Zhijun, Zhou Kaiming, Luo Binbin, Jiang Biqiang, Mou Chengbo, Sun Qizhen, Zhang Lin
Summary: The development of excessively tilted fiber gratings (Ex-TFGs) has provided a new type of sensing device with high refractive index sensitivity, low thermal crosstalk, and vector sensing properties. These gratings have unique advantages such as dual-peak resonances and exceptional orientation sensing capability. Due to their specific mode coupling behavior, Ex-TFGs have been used for various sensing applications, including polarization dependent torsion sensors, vector accelerometers, and low thermal crosstalk bio/chemical sensors.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Hong Wu, Hua Zhang, Feng Li, Wei Su
Summary: This paper presents a highly sensitive temperature sensor based on the Fano resonance in two-dimensional photonic crystals. By utilizing a carefully designed double cavity and symmetrically coupling it with a line-defect waveguide, the sensor achieves high sensitivity and optimized quality factor.
Article
Physics, Applied
Xiaoqing Zhu, Bo Wang
Summary: This paper proposes a hybrid structure based on a two-dimensional grating surface for self-referenced refractive index sensing in the near-infrared band. The structure shows more stable reference signal and better sensing performance, indicating promising applications.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Baeck B. Choi, Bethy Kim, Jason Bice, Curtis Taylor, Peng Jiang
Summary: This study achieved a high figure of merit (FOM) of 112.34 with the Au-covered epoxy grating (Au/Epoxy), showing advantages over the Au/PC grating.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Rehan Shafiq, Javed Iqbal, Adnan Daud Khan, Anees Ur Rehman
Summary: The extraordinary optical transmission (EOT) behavior of a subwavelength plasmonic nanostructure is investigated. The structure, composed of a gold film with a square nanohole array on a silicon dioxide substrate, exhibits broadband transmission peaks and reduced size due to the excitation of localized surface plasmon resonances. The nanostructure also demonstrates high sensitivity and contrast as a plasmonic sensor.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Optics
Shangkun Guo, Jie Deng, Jing Zhou, Yu Yu, Yonghao Bu, Tianyun Zhu, Xiansong Ren, Zhifeng Li, Wei Lu, Xiaoshuang Chen
Summary: Maintaining light polarization in-plane is crucial for efficient light absorption in 2D materials. Transitioning from a magnetic resonator form to a metasurface Salisbury screen enhances absorption efficiency and bandwidth, especially for graphene, monolayer black phosphorus, and monolayer MoS2.
Article
Engineering, Electrical & Electronic
Xiaoping Jiang, Mengqi Shen, Daniel Pak-Kong Lun, Wen Chen, Michael G. Somekh
Summary: This paper presents a high aspect-ratio open grating Fabry-Perot resonator for aqueous refractive index sensing. The use of transmission line modeling and Smith charts provides a better understanding of the physical sensing mechanism. Experimental results show a significant improvement in performance compared to conventional surface plasmon resonance technology.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Ying Liang, Hao Zhang, Bangcai Huang, Bo Liu, Wei Lin, Jianjun Sun, Dongbo Wang
Summary: This paper proposes a compact fiber-optic temperature sensor based on RIL functionalized SHMOFs and investigates the transmission spectral characteristics from experimental and theoretical perspectives. The sensor exhibits ultrahigh sensitivity and wide measurement range, making it a promising candidate for various applications in environmental monitoring, industrial, and agricultural production.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Multidisciplinary
Parthiban Manickam, Revathi Senthil
Summary: This study presents a Surface Plasmonic Resonance based D-shape oval open loop Photonic Quasi-Crystal Fiber (SPR-PQF) and conducts a numerical study using the Finite Element Method. The fiber exhibits high-temperature sensitivity and wavelength sensitivity, and has great potential in petrochemical sensing applications.
RESULTS IN PHYSICS
(2023)
Article
Biophysics
Seda Nur Topkaya, Idil Karaca Acari, Huseyin Oguzhan Kaya, Imren Ozcan, Suleyman Koytepe, Arif E. Cetin
Summary: This article presents an electrochemical biosensor utilizing graphite electrodes decorated with NiFe2O4 nanoparticles for nucleic acid detection. The synthesized NiFe2O4 nanoparticles showed a diameter of around 10 nm and high surface area and conductivity on the electrode surface. The interactions between NiFe2O4 nanoparticles and nucleic acids were effectively examined for the first time using various electrochemical analysis methods, demonstrating successful interaction via an electrostatic mode.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Editorial Material
Optics
Jiri Ctyroky, Jiri Petracek
Summary: This article points out that the electro-optic modulation of the bound state in the continuum in a low-index dielectric-loaded slab LiNbO3 waveguide, as reported by Yu et al., [Optica 6, 1342 (2019)], is treated incorrectly. The authors' claim of high efficiency is challenged based on perturbation approach and numerical simulation analysis. The experimental results described in the paper remain unexplained.
Article
Optics
J. Petracek, V. Kuzmiak
Summary: We study a photonic implementation of a modified Fano-Anderson model and calculate its spectral and scattering properties using the coupled mode theory. The main predictions drawn from the theoretical model are verified by rigorous full-wave simulations of realistic structures.
Article
Optics
Jiri Ctyroky, Jiri Petracek, Vladimir Kuzmiak, Ivan Richter
Summary: This article discusses several types of integrated photonic LiNbO3 waveguides that support the propagation of modes classified as bound states in the continuum (BICs). The key properties leading to the existence of BICs (or quasi-BICs) are material anisotropy, waveguide birefringence, or a combination of both. Typical examples include titanium diffused and proton exchanged waveguides in bulk LiNbO3 crystals, as well as recently proposed dielectric-loaded waveguides on LiNbO3 thin films.
Article
Chemistry, Multidisciplinary
Arif E. Cetin, Seda Nur Topkaya, Ziya Ata Yazici, Ozden Yalcin-Ozuysal
Summary: Functional assay platforms can identify the biophysical properties of cells and their therapeutic response to drug treatments. Single-cell functional assays can overcome the limitations of traditional assays and reveal drug resistance. We developed a high-throughput plasmonic functional assay platform to simultaneously monitor cell growth and therapeutic response to drugs. This platform has the potential for rapid assessment of cell therapy and personalized drug treatments.
Article
Chemistry, Physical
Arif E. Cetin
Summary: This article introduces a portable plasmonic biosensor kit for the detection of Neisseria gonorrhoeae (NG) and Chlamydia trachomatis (CT) bacteria in urine samples. The platform combines label-free plasmonic nanohole sensing with lens-free computational imaging, revolutionizing point-of-care pathogen diagnosis. The system captures and analyzes diffraction field images, uncovering subtle bacterial presence cues.
Article
Chemistry, Physical
Vagif Nevruzoglu, Murat Tomakin, Melih Manir, Selcuk Demir, Fatih Saban Beris, Arif E. Cetin
Summary: Plasmonic nanoparticles with distinct nearfield properties are promising for label-free biosensing applications. A cryogenic temperature method for vacuum evaporation is proposed to produce nanoparticles with homogenous size distribution and high structural quality, enabling the excitation of plasmonic resonances with narrower linewidths and more controlled dimensions. The method shows enhanced refractive index sensitivity and larger spectral shifts within plasmonic resonances compared to the classical vacuum deposition technique.
Article
Chemistry, Analytical
Meryem Beyza Avci, S. Deniz Yasar, Arif E. Cetin
Summary: Cell-counting is crucial for various applications in life sciences, medicine, and pharmacology, but manual counting under a microscope is slow and limited by operator experience. Automated cell-counting devices with image recording and processing capabilities can improve accuracy and throughput. However, these devices still need further improvement in accuracy, and the test cost increases due to the need for compatible consumables. To address these drawbacks, we introduced an optofluidic cell-counting platform that can scan over 2000 cells, significantly improving test accuracy. The platform delivers count results in about 1 minute and eliminates the need for an external counting chamber.
ANALYTICAL METHODS
(2023)
Article
Automation & Control Systems
Gorkem Liman, Emre Ergene, Emrecan Yildiz, Kubra Ozkan Hukum, Pinar Yilgor Huri, Arif E. Cetin, Hakan Usta, Gokhan Demirel
Summary: By decorating plasmonic nanoparticles on magnetic actuators, we demonstrate a new soft actuator platform that can generate reversible and tunable hot-spots in millimeter-sized areas via bending motion. The hot-spot formation is shown to be reversible and adjustable, with Raman signal enhancements of up to approximately 120 folds compared to the unactuated platforms. The accessible electromagnetic field magnification in the platform can be manipulated by controlling magnetic field strength. Additionally, a centipede-inspired robot is fabricated and used for sample collection/analysis in a target environment.
ADVANCED INTELLIGENT SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Sena Yaman, Meryem Beyza Avci, Fatma Kurul, Seda Nur Topkaya, Arif E. Cetin
Summary: We have developed a lensfree optofluidic platform for label-free identification of biomolecular interactions. Our platform is compact, portable, and utilizes microfluidics and on-chip computational imaging. The experimental results demonstrate the high sensing capabilities and cost-effective infrastructure of our platform, making it a promising tool for biosensing applications.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Proceedings Paper
Engineering, Biomedical
Fatma Kurul, Ziya Ata Yazici, Zeynep A. Kocer, Seda Nur Topkaya, Arif E. Cetin
Summary: The development of rapid diagnostic kits is crucial for early diagnosis and treatment of infectious diseases. This study introduces a lightweight and portable biosensor that utilizes a plasmonic chip based on nanohole arrays integrated into a lens-free imaging system for label-free virus detection in field settings. The biosensor platform employs a high-efficiency CMOS camera to observe the diffraction field patterns of nanohole arrays, enabling reliable and accurate detection of H1N1 viruses at medically relevant concentrations. The platform technology is adaptable and can be used for detecting other viral diseases such as COVID-19 or influenza by modifying the plasmonic chip surface.
TRANSLATIONAL BIOPHOTONICS: DIAGNOSTICS AND THERAPEUTICS III
(2023)
Proceedings Paper
Engineering, Biomedical
Meryem Beyza Avci, Seda Nur Topkaya, Ozden Yalcin-Ozuysal, Ali Khademhosseini, Arif E. Cetin
Summary: A new platform has been developed to measure the weight and growth of individual cells in real time, allowing for quick measurement of cell growth in small samples and determination of differences in cell population growth and cancer cells' response to drug treatment.
TRANSLATIONAL BIOPHOTONICS: DIAGNOSTICS AND THERAPEUTICS III
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Zeynep Ovgu Yayci, Ugur Dura, Zeynep Betul Kaya, Arif E. Cetin, Mehmet Turkan
Summary: This study aims at addressing the issues of illumination, contrast, color aberration, blur, and noise in low-cost microscopes at high image magnification rates. By utilizing principal component analysis and feature map processing, the proposed method produces sharper, and better color and illumination fixed outputs.
2022 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, ICIP
(2022)
Article
Optics
J. Petracek, V Kuzmiak
Summary: We developed a theoretical framework based on the coupled-mode theory to describe the spectral and scattering properties of an extended Fano-Anderson model in a waveguide array with additional side-coupled waveguides. The structure supports various eigenmodes, including bound state in the continuum (BIC) and other bound and leaky modes, which can be classified based on the relation between the self-coupling coefficients and eigenvalues. This research provides insights into the resonant properties of complex systems and offers a lossless platform for PT-symmetry phase transition.
Article
Nanoscience & Nanotechnology
Zhiliang Zhang, Feng Zhao, Renxian Gao, Chih-Yu Jao, Churong Ma, Jie Li, Xiangping Li, Bai-Ou Guan, Arif E. Cetin, Kai Chen
Summary: This article introduces a plasmonic sensor based on gold nanohole arrays that can achieve real-time, label-free, and high-sensitivity biosensing. The authors demonstrated narrow-band high-order resonances enabled by Rayleigh anomaly in the nanohole arrays fabricated by scalable colloidal lithography. They also introduced a spectrometer-free refractive index sensing method based on lens-free smartphone imaging of the nanohole arrays. The work shows potential for highly sensitive and compact point-of-care devices with cost-effective and high-throughput plasmonic chips.
