Article
Optics
Farnaz Jabbarzadeh, Amir Habibzadeh-Sharif
Summary: A new dielectric loaded plasmonic waveguide is proposed for sensing applications and optical interconnects by inserting a graphene layer to enable symmetrical propagation of SPP waves. The waveguide shows high sensitivity and low detection limit, suitable for integrated photonics.
OPTICS COMMUNICATIONS
(2021)
Article
Engineering, Multidisciplinary
M. A. Butt, N. L. Kazanskiy, S. N. Khonina
Summary: In this study, numerical analysis is conducted to investigate the conversion efficiency of mode converters for plasmonic waveguides. The efficient coupling of light to the sub-nano scale waveguide from an external source is a major concern for metal-insulator-metal waveguide devices, which has not been extensively studied before. The proposed dielectric-to-plasmonic and plasmonic-to-dielectric mode converters demonstrate an overall conversion efficiency of approximately -1.6 dB for a 5000 nm long device. Additionally, a MIM waveguide-based sensor with a circular hollow cavity is designed for refractive index sensing applications, exhibiting a sensitivity of 1132.14 nm/RIU and a figure of merit of 48.17 RIU-1. This study is expected to pave the way for highly integrated plasmonic sensors based on MIM waveguides.
Article
Materials Science, Multidisciplinary
Chung-Ting Chou Chao, Yuan-Fong Chou Chau, Hai-Pang Chiang
Summary: An ultra-compact plasmonic nanostructure was proposed to achieve multiple Fano resonance (FR) modes by introducing an air path, resulting in improved sensing performance. Through numerical simulations, it was found that optimizing structural parameters can lead to high sensitivity applications for refractive index and temperature sensing in the proposed structure.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Martin Rothe, Yuhang Zhao, Johannes Mueller, Guenter Kewes, Christoph T. Koch, Yan Lu, Oliver Benson
Summary: This study demonstrates local, subdiffraction limited chiral coupling of light and propagating surface plasmon polaritons in a self-assembled system. Characterization of the nanoantenna-nanowire systems is done comprehensively through various imaging techniques, supported by three-dimensional numerical simulations. The system shows promise for on-chip sensing of chiral analytes far below the diffraction limit.
Article
Pharmacology & Pharmacy
Melanie Pereira, Ana Rita O. Rodrigues, Leslie Amaral, Manuela Corte-Real, Catia Santos-Pereira, Elisabete M. S. Castanheira
Summary: Bovine lactoferrin (bLf) is an effective antifungal protein derived from milk. Its encapsulation in plasmonic magnetoliposomes (PMLs) enhances its biological activities. PMLs containing manganese ferrite nanoparticles and gold nanoparticles were prepared and loaded with bLf, demonstrating promising potential for bLf delivery in antifungal therapy.
Article
Engineering, Electrical & Electronic
Santosh Kumar, Ashutosh Kumar, Rahul Dev Mishra, Prem Babu, Suresh Kumar Pandey, Manoj K. Pal, Mukesh Kumar
Summary: This article proposes a nanophotonic ring resonator based on a slotted hybrid plasmonic waveguide (HPW) for resonance-enhanced sensing. The slotted ring structure provides a propagation length of over 2.5 mm with subwavelength confinement at 1.55 μm wavelength, as well as broadband propagation of HP in the range of 1.3-1.6 μm. By changing the analyte refractive index, a 29.6-nm shift in the transmission spectra is observed, and the sensitivity for detecting polluted water is reported to be 1609 nm/RIU. The proposed slotted waveguide structure has potential applications in nanophotonic devices for biochemical sensing and large-scale photonic integration.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Santosh Kumar, Ashutosh Kumar, Rahul Dev Mishra, Prem Babu, Suresh Kumar Pandey, Manoj K. Pal, Mukesh Kumar
Summary: Proposed a nanophotonic ring resonator based on a slotted hybrid plasmonic waveguide, allowing for resonance-enhanced sensing and strong light-analyte interaction at the subwavelength scale. The structure exhibited a propagation length of over 2.5 mm and subwavelength confinement at a wavelength of 1.55 μm. By changing the refractive index of the analyte, a 29.6-nm shift in the transmission spectra was observed, with a reported sensitivity for detecting polluted water approximately four times higher than a dielectric slotted ring resonator and eight times higher than a ring resonator with a ridge structure. This slotted waveguide structure has potential applications in nanophotonic devices, including biochemical sensing and large-scale photonic integration.
IEEE SENSORS JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Mariacristina Turino, Nicolas Pazos-Perez, Luca Guerrini, Ramon A. Alvarez-Puebla
Summary: SERS technology is important for its ultrasensitive analytical capabilities, and researchers have modified metallic surfaces to carry positive charges in order to improve the adhesion of negatively-charged species. Cationic amines are preferred for their ability to maintain a positive zeta potential even in alkaline pH conditions and their accessibility.
Article
Engineering, Electrical & Electronic
Zhongjun Ma, Yanlong Zheng, Xiaobao Zhao, Jianchun Li, Jian Zhao
Summary: This article presents the design of a dielectric-loaded converging waveguide antenna (DLCWA) that has unparalleled advantages for microwave fracturing of low loss hard rocks.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Chemistry, Physical
Shahab Tavana, Shahram Bahadori-Haghighi
Summary: A metal-insulator-metal (MIM) structure consisting of a semi-circular resonant cavity (SCRC) and a circular split-ring resonator (SRR) is proposed and designed for optical sensing applications. The coupling between the SCRC and SRR can create dual Fano resonances in the visible range. The structure exhibits a high sensitivity and figures of merit, making it potentially useful for plasmonic nanosensors and slow-light devices.
Article
Materials Science, Multidisciplinary
Muhammad Ali Butt, Nikolay Lvovich Kazanskiy, Svetlana Nikolaevna Khonina
Summary: A numerical analysis of a metal-insulator-metal (MIM) waveguide for refractive index sensing is proposed in this study. The sensing device consists of a MIM bus waveguide with a semicircular cavity, providing a high extinction ratio transmission dip compared to the standard configuration. Mode converters are also embedded to overcome the obstacle of light coupling. The sensitivity of the device is approximately 941.33 nm RIU-1, making it a promising candidate for point-of-care testing.
ADVANCED PHOTONICS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Abdulaziz H. Haddab, Edward F. Kuester, Christopher L. Holloway
Summary: Resonant transmission through a dielectric-loaded slot embedded in a thick conducting diaphragm in a rectangular waveguide was studied using an analytical approximation, revealing ordinary and extremely narrowband resonances associated with different modes in the slot. The theoretical predictions were confirmed through numerical simulation and experimental measurement, while additional sharp resonances were observed in measurements on dielectrics consisting of multiple pieces, providing potential applications in sensors and material property measurement.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Chemistry, Multidisciplinary
Parviz Saeidi, Bernhard Jakoby, Gerald Puhringer, Andreas Tortschanoff, Gerald Stocker, Jasmin Spettel, Florian Dubois, Thomas Grille, Reyhaneh Jannesari
Summary: This work investigates the optimization of a plasmonic slot waveguide (PSWG) in the mid-IR region, with a focus on a representative wavelength of 4.26 μm, which is the absorption line of CO2. The study analyzes the mode features of different structures and optimizes the PSWG based on a figure of merit (FOM) that considers confinement factor and propagation length. Attractive wavelengths and geometries that maximize the FOM are also identified for other wavelengths.
Article
Engineering, Electrical & Electronic
Hanan M. Khatab, Nihal F. F. Areed, Hamdy A. El-Mikati, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: A compact plasmonic line-up filter for sensing applications is proposed and analyzed in this study. The filter design offers high sensitivity and high quality factor, making it suitable for oil sensing and DNA hybridization detection.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Tao Ma, Shaohui Liu, Yongsheng Tian, Heng Liu, Fang Wang
Summary: A graphene-hBN-silicon hybrid plasmonic rib waveguide is designed for refractive index sensing, achieving a high FOM value by optimizing size parameters and showing remarkable propagation performance peaks. The sensing structure demonstrates good sensitivity for homogeneous and surface sensing, making it suitable for ultra-compact on-chip micro-nano photonic biochemical sensing systems.
IEEE SENSORS JOURNAL
(2021)
