Article
Optics
Victor Pacheco-Pena, Toby Hallam, Noel Healy
Summary: MXenes, as an emerging class of two-dimensional materials, show significant potential for use in next generation optoelectronic sensors. By tuning the plasma frequencies, they can produce plasmon resonances across different spectral ranges, adding a degree of freedom to the sensing mechanism.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Multidisciplinary Sciences
Hosam Mekawey, Yehea Ismail, Mohamed Swillam
Summary: For the first time, this study investigated the phenomenon of Extraordinary Optical Transmission (EOT) in Silicon (Si) thin films with subwavelength holes array and high excess carrier concentration. By introducing excess carriers into the perforated Si film, an enhanced transmission effect similar to that in metallic films was observed in the mid-IR range. The research also explored the potential of using perforated Si thin films for sensing materials with similar refractive index but different absorption fingerprints.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Electrical & Electronic
Maxime Lobry, Hadrien Fasseaux, Mederic Loyez, Karima Chah, Erik Goormaghtigh, Ruddy Wattiez, Francesco Chiavaioli, Christophe Caucheteur
Summary: Gold-coated tilted fiber Bragg gratings (TFBGs) have been extensively studied for biosensing applications, with a more sensitive demodulation method based on the intersection of the upper and lower envelopes of TFBG spectra being reported in this paper. This method has been successfully applied in detecting HER2 proteins, and practical improvements such as superimposing a uniform FBG and implementing a micro-fluidic system have been made to enhance the sensing platform for practical applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Nunzio Cennamo, Domenico Del Prete, Francesco Arcadio, Luigi Zeni
Summary: A novel sensing method for temperature measurements of liquids using plasmonic resonance in multimode plastic optical fibers has been devised. The method involves connecting two different D-shaped POF platforms to measure temperature changes in the solution covering the thermosensitive platform. This approach allows for the measurement of temperature by varying the light launch conditions in the surface plasmon resonance POF sensor as a result of temperature changes.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Donglian Hou, Nannan Luan, Xianxing Ji, Wandi Zhang, Zhiwei Zhang, Xia Jiang, Li Song, Yaoyao Qi, Jianfei Liu
Summary: In this study, a surface plasmon resonance sensor based on double-sided polished microstructured optical fiber coated with graphene-on-silver layers is proposed. The sensor's sensitivity can be improved by optimizing the design parameters of the fiber to enhance the wavelength and amplitude sensitivities.
IEEE PHOTONICS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Zeinab Khaghani, Mahmood Hosseini Farzad, Asghar Asgari
Summary: This article introduces a planar nanostructure in magnetoplasmonics with enhanced transverse magneto-optical activity. It analyzes the magneto-structures containing both a metal layer and a linear array of nanorods and compares them with a conventional three-layer structure based on transverse magneto-optical Kerr effect. The results show significant improvement in the proposed structures, especially in refractive index sensitivity, making them suitable for biosensing applications. The idea presented here can be applied to other three-layer structures, leading to improvement in their magneto-optical activity and refractive index sensitivity.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Optics
Benoit Rogez, Zakaria Marmri, Franck Thibaudau, Guillaume Baffou
Summary: This article provides a comprehensive description of the photothermal effects in plasmonics involving metal layers, with a focus on the impact of nanoholes and various parameters on the system. The study revisits the concept of absorption cross section and discusses the complex photothermodynamical physics in systems with plasmonic nanoholes mixing localized and surface plasmons.
Article
Engineering, Electrical & Electronic
Paul S. Westbrook, Tristan Kremp, Benyuan Zhu, Wing Ko, Zhou Shi, Kenneth S. Feder
Summary: We discuss the application and effects of enhanced backscattering fiber in telecom networks, including increased attenuation and multipath interference. Our analysis allows us to determine the sensor reach based on the level of backscattering enhancement, and we measure the penalty for signals near the enhancement bandwidth to show that it does not interfere with telecom signals.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Mohsen Samadi, Pooya Alibeigloo, Abolfazl Aqhili, Mohammad Ali Khosravi, Farahnaz Saeidi, Shoaib Vasini, Mostafa Ghorbanzadeh, Sara Darbari, Mohammad Kazem Moravvej-Farshi
Summary: Plasmonic tweezers are indispensable tools for manipulating micro and nano-objects with high precision, utilizing surface plasmon technology to trap particles beyond the diffraction limit. Trapping-potential landscape can be reconfigured by designing plasmonic nanostructures.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Shu-Cheng Lo, Chun-Wei Yeh, Sheng-Hann Wang, Chia-Wen Kuo, Kuang-Li Lee, Ruey-Lin Chern, Pei-Kuen Wei
Summary: The research demonstrates that Fano resonance in an aluminum capped nanoslit array can eliminate the signal of bulk refractive index changes, enabling measurement of only the bio-layer thickness without interference.
Article
Engineering, Electrical & Electronic
Timothy J. Palinski, Brian E. Vyhnalek, Gary W. Hunter, Amogha Tadimety, John X. J. Zhang
Summary: This study demonstrates a platform for the active switching of hybrid plasmonic-photonic Fano resonances, achieving on/off switching of narrow Fano resonance transparency windows with high contrast and tunability across a wide spectral range by modulating refractive index. The structure includes gold nanogratings sandwiched between two dielectric thin films, and controlling the interaction of substrate and superstrate modes through refractive index tuning enables both spectral and spatial selectivity.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
K. M. Mustafizur Rahman, M. Shah Alam, Rajib Ahmed, M. Asiful Islam
Summary: A highly sensitive hexagonal photonic crystal fiber (PCF) based surface plasmon resonance (SPR) refractive index (RI) sensor is proposed, with optimized design structure and parameters for optimal performance in various refractive index ranges.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Hyun-Tae Kim, Miao Yu
Summary: We report an ultracompact on-fiber multiparameter sensor that employs multiple guided-wave surface plasmon resonances and machine learning based signal processing. The sensor is capable of simultaneous measurement of multiple parameters and utilizes a neural network model to enhance the sensing accuracy. A proof-of-concept sensor using a UV-curable polymer as a waveguide material is demonstrated for simultaneous measurement of temperature and salinity of salt solutions.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Mohamed Ilyes Habia, Aissa Manallah, Khaled Ayadi
Summary: Plasmonic materials and phenomena have been widely studied and applied in various fields, including the engineering of biosensor devices. Diseases of the red blood cells, such as anemia, result in abnormal reduction in hemoglobin concentration, leading to insufficient oxygen supply to tissues and organs. This numerical study aims to analyze the behavior of blood with surface plasmon resonance (SPR) and evaluate the application of SPR technique in the detection of blood diseases, specifically by studying the changes in hemoglobin concentrations (refractive index).
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Weidong Zhang, Hung Chiang, Te Wen, Lulu Ye, Hai Lin, Haitan Xu, Qihuang Gong, Guowei Lu
Summary: Coupled plasmonic systems are of interest for their optical properties and potential applications. An improved method for mapping geometric configurations to optical properties accurately is developed, allowing for the realization of low-loss cavity and interesting effects in metallic nanoparticles. Asymmetric coupling is predicted to lead to chirality and directional energy transfer in hybrid plasmonic systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Correction
Physics, Applied
Dat Q. Tran, Rosalia Delgado-Carrascon, John F. Muth, Tania Paskova, Muhammad Nawaz, Vanya Darakchieva, Plamen P. Paskov
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Sanjit Varma, Somia Sharma, Merbin John, Richa Bharadwaj, Anuj Dhawan, Shiban K. Koul
Summary: This paper introduces two compact textile-based planar dipole and loop antennas for wearable communication applications, designed and tested through simulations and experiments to consider the impact of human body positions. The antennas perform well in free space and on-body scenarios, providing return loss below -10 dB in all cases with resonant frequency close to 2.4 GHz. Observations show that the presence of the human body influences the antenna radiation pattern, making it more directive and increasing the front-to-back ratio.
INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
(2021)
Article
Energy & Fuels
Kamal Kumar, Abhijit Das, Uttam Kumar Kumawat, Anuj Dhawan
Summary: A triple-junction tandem organic solar cell with polymer active materials was presented, showing improved performance by introducing plasmonic nanospheres over the top electrode. Aluminum nanospheres were found to enhance light trapping, leading to a 14% improvement in overall short circuit current density.
ENERGY SCIENCE & ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Ajay Kumar Agrawal, Akanksha Ninawe, Anuj Dhawan
Summary: This paper reports a significantly improved sensing response of a plasmonic sensor based on a nanopillar array separated from a thin film, operated using the Kretschmann configuration. The sensor shows high sensitivity and figure of merit for both localized and bulk sensing responses. It can be easily fabricated and has great potential for biosensing applications.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Yashna Sharma, Anuj Dhawan
Summary: This study proposes active near-field plasmonic switches based on a Sierpinski-fractal contour-bowtie plasmonic nanoantenna on top of a VO2 thin film. The near-field intensity of the switch can be controlled by the phase change of VO2, leading to a switch from an OFF state to an ON state. The intensity switching ratio (ISR) of the switch can be quantified, and simulations show that higher fractal orders of the nanoantenna result in higher ISR values.
Article
Engineering, Electrical & Electronic
Abhijit Das, Ajay Kumar Agrawal, Nitin Gupta, Anuj Dhawan
Summary: In this paper, a fabrication method for LSPR sensor chips consisting of crystalline gold nanoparticles is demonstrated. The crystalline AuNPs are grown on a heated silica substrate through thermal evaporation, and nanoparticles with thickness up to 40 nm are successfully formed. This new fabrication method provides a greater potential for the performance of LSPR sensors.
IEEE SENSORS JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Rajib Ratan Ghosh, Anuji Dhawan
Summary: Programmable integrated photonics is an emerging research field that utilizes phase change materials (PCMs) with non-volatile properties as the active layer for programmable photonics. In this work, hybrid device architectures utilizing the non-volatile properties of PCMs on a Si3N4 platform are investigated, and non-volatile reconfigurable reflector switches and 1x2 mode converter switches are proposed. These optical switches offer advantages such as low loss, small size, broadband operation, and low cross talk, making them suitable for applications in optical communication systems and nanophotonics.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Akanksha Ninawe, Anuj Dhawan
Summary: This paper presents the numerical investigation of several complex plasmonic nanostructures for SEIRA spectroscopy-based substrates. The proposed nanostructures exhibit substantially large SEIRA enhancement factor compared to previously reported enhancement factor values. The plasmonic properties of the proposed nanostructures have been studied and the highest SEIRA enhancement occurs at a wavelength of 6800 nm.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Engineering, Electrical & Electronic
Rajib Ratan Ghosh, Anuj Dhawan
Summary: In this paper, novel architectures for non-volatile directed logic circuits are presented. These circuits demonstrate low insertion losses, high extinction ratios, as well as multi-bit and broadband operations. The non-volatile switching operations are performed using a non-volatile phase change material, controlled by electro-thermal switching. The study provides a practical technique to design future high-speed nanoscale non-volatile photonic integrated circuits for logic computing applications.
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2023)
Article
Optics
Yashna Sharma, Enes Dakmak, Hsiang-Kuo Yuan, Roberto Garcia, Dale Batchelor, Tuan Vo-dinh, Tushar Ghosh, Anuj Dhawan
Summary: We describe voltage-controlled surface-enhanced Raman scattering (SERS) substrates that can actively modulate SERS signals by applying voltage. These substrates employ a dielectric electroactive polymer (D-EAP) membrane with electrically-actuated active regions. Activation of these regions induces contractile strain in the SERS dye-coated nanoparticle areas of the D-EAP, resulting in enhanced SERS signals.
Article
Chemistry, Multidisciplinary
Abhijit Das, Nitin Gupta, Ajay Kumar Agrawal, Anuj Dhawan
Summary: This paper presents a method for fabricating plasmonic nanostructures over a large area for use as SERS substrates, with batch processes that can produce large numbers of substrates in a single run. The effects of different process parameters were studied to optimize sensitivity for molecule detection as low as 100 nM. The fabricated SERS substrates were also evaluated for uniformity and reproducibility, and successfully applied for label-free detection of organophosphorous pesticides.
Article
Materials Science, Multidisciplinary
Ajay Kumar Agrawal, Abhijit Das, Nitin Gupta, Kamal Kumar, Anuj Dhawan
Summary: This paper presents plasmonic switches based on vanadium dioxide (VO2) and gold nanoparticles (Au NPs) that exhibit enhanced switching of optical transmission as the temperature increases. The operating wavelength of the switch can be tuned between 650 and 1000 nm using the localized surface plasmon resonance properties of the Au NPs.
ADVANCED PHOTONICS RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Abhijit Das, Kamal Kumar, Anuj Dhawan
Summary: Novel localized surface plasmon resonance (LSPR) sensors based on gold nanostructures were proposed and studied through numerical simulations. By optimizing the plasmonic nanostructures, high sensing performance in terms of both bulk sensitivity and localized refractive index sensing sensitivity was achieved.
Article
Optics
Rajib Ratan Ghosh, Anuj Dhawan
Summary: This paper demonstrates a significant enhancement of optical electromagnetic fields by combining plasmonic nanoantennas with bull's eye structures, resulting in high field enhancement and optical energy coupling through subwavelength apertures. Geometrical parameters were optimized to achieve the highest near-field enhancement, with the resonance wavelength tunable by adjusting the periodicity of the bull's eye structures. The proposed hybrid nanostructure shows great potential in various fields such as surface-enhanced Raman scattering, plasmon-enhanced fluorescence, optical trapping, and nonlinear optics.
Article
Computer Science, Information Systems
Ajay Kumar Agrawal, Akanksha Ninawe, Anuj Dhawan
Summary: A surface plasmon resonance sensing and imaging platform based on plasmonic non-uniform nano-gratings with narrow groove is proposed, showing high sensitivity and ease of fabrication.
