Article
Optics
Zhen Liao, Xing Peng, Leilei Liu, Yihao Xu, Kai-Da Xu, Baicao Pan, Guo Qing Luo, Yongmin Liu
Summary: The emergence of exceptional points in non-Hermitian systems provides possibilities for enhancing sensor sensitivity, but implementing subwavelength non-Hermitian systems remains a challenge. One potential solution is to use localized surface plasmon resonances, which enable large electromagnetic enhancement at the subwavelength scale. In this work, a novel sensing scheme based on exceptional points in a spoof plasmonic structure at microwave frequencies is proposed, demonstrating ultrahigh sensitivity and opening possibilities for compact sensors in the microwave, terahertz, and far-infrared regions.
LASER & PHOTONICS REVIEWS
(2023)
Review
Quantum Science & Technology
Shailesh Kumar, Sergey I. Bozhevolnyi
Summary: This review discusses recent developments in coupling single photon emitters to plasmonic waveguides, comparing different configurations and experimental methods to achieve high figure-of-merit (FOM) values. It also explores enhancing coupling efficiency and scalability potential of various waveguide platforms. The discussion includes an experiment demonstrating non-linearity at the single emitter level utilizing enhanced light-matter interaction in a plasmonic waveguide.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Review
Polymer Science
Haizheng Li, Chunai Dai, Yuandu Hu
Summary: This article introduces the applications of hydrogels in chemical and biosensing, focusing on their characteristics as sensing materials and the different types of responsive hydrogels. Hydrogels have vast potential for applications in the biomedical field and wearable devices.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Analytical
Justina Anulyte, Ernesta Buzavaite-Verteliene, Evaldas Stankevicius, Kernius Vilkevicius, Zigmas Balevicius
Summary: In this study, the sensitivity to refractive index changes of different structures was compared, showing that the hybrid plasmonic mode, due to strong coupling effect, has higher sensitivity to refractive index changes than traditional surface plasmon resonance.
Article
Chemistry, Analytical
Kai-Xin Xie, Qian Liu, Shu-Shu Jia, Xiu-Xian Xiao
Summary: The introduction of a hollow plasmonic structure led to enhanced surface plasmon-coupled emission (SPCE), resulting in significant fluorescence signal enhancements. This was primarily attributed to the unique hot-spot plasmonic structure between GNS and gold substrate, the intense electromagnetic field of GNSs, and the strong coupling interactions between fluorescence and surface plasmons.
ANALYTICA CHIMICA ACTA
(2021)
Article
Engineering, Electrical & Electronic
Anton Zyapkov, Atanas Tzonev
Summary: In this study, silver nanowires were embedded in a polymer waveguide doped with Rhodamine 6 G. The waveguides were constructed using electron beam lithography. The results showed a significant gain in the polymer waveguide and an increase in the intensity of scattered plasmons by pumping Rhodamine at the end of the nanowire.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Physics, Multidisciplinary
Yubo Liang, Guangqing Wang, Yan Cheng, Duo Cao, Dejun Yang, Xiaoyong He, Fangting Lin, Feng Liu
Summary: The tunable propagation properties of 3D Dirac semimetal-supported dielectric-loaded surface plasmons structures in the THz regime were investigated, and it was found that both the shape of the dielectric fiber and the Fermi level of the 3D DSM layer have significant influences on the hybrid mode, providing insights into the tunable mechanisms of 3D DSM plasmonic devices.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Li Jiang, Kien Voon Kong, Sailing He, Ken-Tye Yong
Summary: Observing the Goos-Hanchen shift of the incident light beam can detect fast phase variations without direct phase measurements. This study shows that nano-engineered van der Waals structures on a plasmonic surface can enhance the sensitivity of phase variation to analyte presence, leading to a significant increase in the Goos-Hanchen shift.
Article
Optics
Rafael Guzman-Cabrera, Jose R. Guzman-Sepulveda
Summary: In this study, a comprehensive modal analysis of a long-range surface plasmon polariton waveguide was conducted using numerical simulations. The research found conditions where a significant phase change can be induced with minimal losses in the structure. The designed waveguide is suitable for biologically relevant situations and can be fabricated with commercial grade materials commonly available in clean room facilities.
Article
Nanoscience & Nanotechnology
Seemesh Bhaskar, Venkatesh Srinivasan, Sai Sathish Ramamurthy
Summary: The green synthesis of nanomaterials with multifaceted applications in photonics and biomedical fields is a difficult challenge. This study demonstrates a 1-minute, user-friendly, and eco-friendly green synthesis of Nd2O3-Ag nanohybrids with synergistic surface functionalities. The nanohybrids possess excellent bactericidal, fungicidal, antioxidant, and anticancer properties, and can be used for food hazard sensing. The proposed methodology has the potential for transdisciplinary nanophotonics and biomedical sensing applications.
ACS APPLIED NANO MATERIALS
(2023)
Review
Chemistry, Analytical
Zahra Fattahi, Mohammad Hasanzadeh
Summary: This review summarizes the latest advances in nanotechnology-assisted microfluidic biosensing, focusing on various types of nanoparticle-integrated microfluidic sensors. The cooperation between microfluidic biodevices and nanoparticles is considered to be very beneficial in addressing challenges related to microfluidic systems.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Lu Qin, Fei Liu, Yinping Miao, Kailiang Zhang
Summary: The research investigates infrared multi-narrowband tunable plasmonic induced transparency and its application as a plasmonic sensor. By exciting quasi-guided modes in the Al2O3/SiO2 slab waveguide with plasmonic periodic E shaped metallic nanostructures, multiple Fano-shaped transmissions are achieved.
IEEE SENSORS JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Chiara Montali, Stefania Abbruzzetti, Arne Franzen, Giorgia Casini, Stefano Bruno, Pietro Delcanale, Sandra Burgstaller, Jeta Ramadani-Muja, Roland Malli, Thomas Gensch, Cristiano Viappiani
Summary: S-Nitrosylation of cysteine residues is an important molecular mechanism for post-translational regulation of proteins, and the sensitivity of fluorescent proteins to nitric oxide has been discovered, which is of great significance for cell biology research.
Review
Nanoscience & Nanotechnology
Taerin Chung, Hao Wang, Haogang Cai
Summary: In the past decades, nanophotonic biosensors have evolved from plasmonic platforms to dielectric metasurfaces, which provide comparable sensitivity with superior resonance properties. Dielectric metasurfaces solve issues related to plasmonic photothermal effect, offering better repeatability, stability, and biocompatibility. This review discusses high-Q resonances based on different physical phenomena tailored by meta-atom geometric designs, and highlights the use of dielectric metasurfaces in refractometric, surface-enhanced, and chiral sensing for various biomedical and diagnostic applications. The review also explores the potential of hyperspectral imaging and single metasurface integration for improved biomolecular sensing and simplified optical output engineering, as well as provides perspectives on future development in metasurface nanofabrication, functionalization, material, configuration, and integration towards next-generation optical biosensing.
Article
Nanoscience & Nanotechnology
Joel Berk, Matthew R. Foreman
Summary: Methods to increase light scattering from small particles can improve the sensitivity of sensing techniques by investigating the role of multiple scattering on the scattered signal. It was found that there is an optimum scatterer density for maximizing sensitivity enhancement, with achievable factors on the order of 10^2. The dependence of enhancement factors on scatterer properties was also studied.
Article
Physics, Applied
Dhritiman Bhattacharya, Peng Sheng, Md Ahsanul Abeed, Zhengyang Zhao, Hongshi Li, Jian-Ping Wang, Supriyo Bandyopadhyay, Bin Ma, Jayasimha Atulasimha
Summary: Applying a surface acoustic wave (SAW) across the terminals of a magnetic tunnel junction (MTJ) decreases both the parallel and antiparallel resistances of the MTJ, with a larger decrease in the latter. However, the coercivities of the free and fixed layers of the MTJ remain unaffected, indicating that the SAW does not cause significant magnetization rotation in the magnetic layers. This study sheds light on the dynamic behavior of an MTJ under periodic compressive and tensile strain.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Condensed Matter
Rahnuma Rahman, Supriyo Bandyopadhyay
Summary: The LLG equation neglects the effect of spin inertia, but even in slow magneto-dynamics, this effect can have a significant impact, especially in nanoscale ferromagnets, affecting the reliability of magnetic logic and storage.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Rahnuma Rahman, Supriyo Bandyopadhyay
Summary: This study examines the trade-off between energy dissipation, energy-delay product, and switching error probability in energy-efficient nanoelectronics, showing that reducing energy consumption and speeding up switching generally result in higher error probability and reduced reliability.
APPLIED SCIENCES-BASEL
(2021)
Review
Nanoscience & Nanotechnology
Bivas Rana, Amrit Kumar Mondal, Supriyo Bandyopadhyay, Anjan Barman
Summary: This article discusses dynamical phenomena in nanomagnets, particularly focusing on magnetization reversal and its digital applications. It then explores wave-like phenomena in nanomagnets, with an emphasis on spin waves in various nanomagnetic systems and methods for controlling magnetization dynamics in nanomagnet arrays for analog applications. The article concludes with a discussion of interesting spintronic phenomena that underlie the diverse physics observed in nanomagnet assemblies.
Review
Nanoscience & Nanotechnology
Bivas Rana, Amrit Kumar Mondal, Supriyo Bandyopadhyay, Anjan Barman
Summary: When magnets are miniaturized into nanoscale elements, they exhibit various physics phenomena and potential applications. This review discusses recent discoveries of these phenomena and their applications, highlighting the driving factors, underlying system dynamics, manipulation techniques, and specific features that can be utilized for technological advancements. The advantages and disadvantages of nanomagnet-based devices and systems are also pointed out, along with suggestions for future investigations to explore intriguing phenomena and facilitate traditional and non-traditional applications.
Review
Physics, Applied
Supriyo Bandyopadhyay, Jayasimha Atulasimha, Anjan Barman
Summary: The field of straintronics utilizes magnetostrictive nanomagnets as primitive units to manipulate magnetizations for information processing, storage, and communication tasks while minimizing energy consumption. This approach offers advantages of nonvolatility and low energy expenditure, but also presents challenges and opportunities for advancement towards mainstream technology.
APPLIED PHYSICS REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Raisa Fabiha, Jonathan Lundquist, Sudip Majumder, Erdem Topsakal, Anjan Barman, Supriyo Bandyopadhyay
Summary: This study investigates the tripartite coupling between phonons, magnons, and photons in a periodic array of elliptical magnetostrictive nanomagnets on a piezoelectric substrate to form a 2D two-phase multiferroic crystal. The phonons launch surface acoustic waves (SAW) that cause the spin-wave modes (magnons) within the nanomagnets to radiate electromagnetic waves (photons). This phonon-magnon-photon coupling is exploited to implement an extreme sub-wavelength electromagnetic antenna with significantly higher radiation efficiency and antenna gain compared to traditional antennas of the same size.
Article
Engineering, Electrical & Electronic
Rahnuma Rahman, Supriyo Bandyopadhyay
Summary: This paper proposes a compact and nonvolatile nanomagnetic nonbinary matrix multiplier that serves as a useful hardware accelerator for machine learning and artificial intelligence tasks. It can be embedded in non-von-Neumann architectures and reduces reliance on the cloud, making AI more resilient against cyberattacks.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Physics, Condensed Matter
Raisa Fabiha, Supriyo Bandyopadhyay
Summary: This study demonstrates that in spin polarized electron transport on a real topological insulator surface, a local spin imbalance is formed when electrons reflect from a line defect, resulting in a spin current and the formation of a microscopic electric dipole. This affects the electrical resistivity of the medium and leads to spatially varying local magnetic fields.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
Sreya Pal, Pratap Kumar Pal, Raisa Fabiha, Supriyo Bandyopadhyay, Anjan Barman
Summary: This research reports a new phenomenon involving the coupling between spin waves and hybridized phonon-plasmon waves in a nanostructured media. The interaction leads to the emergence of acousto-plasmo-spin waves that exhibit a wide frequency range. The study of this phenomenon provides insights into nonlinear coupling, parametric amplification, and frequency comb physics, and suggests the potential for designing novel active metamaterials with enhanced response and frequency mixing capabilities.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Rahnuma Rahman, Supriyo Bandyopadhyay
Summary: Binary stochastic neurons (BSNs) are excellent activators for machine learning. Low or zero-energy-barrier nanomagnets (LBMs) with slight geometric variations can affect the activation function, pinning current and response time of BSNs, leading to large device-to-device variation and impacting integration.
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Supriyo Bandyopadhyay
Summary: The concept of spin field effect transistor, which manipulates the spin degree of freedom instead of charge degree of freedom, has been studied for three decades. A new concept introduces a spin field effect transistor that does not rely on spin-orbit interaction but uses a strained topological insulator thin film to elicit transistor function by modifying the energy dispersion relation and rotating the spins of the carriers. Although it may not be useful as a switch, it has potential applications such as an energy-efficient single-transistor frequency multiplier.
MATERIALS FOR QUANTUM TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Rahnuma Rahman, Supriyo Bandyopadhyay
Summary: The study demonstrates that using dilute magnetic semiconductors with smaller saturation magnetization in nanomagnets can significantly reduce the variability in response times of BSNs, thereby alleviating device-to-device variation in large-scale neuromorphic systems.
IEEE MAGNETICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Anulekha De, Justine Lynn Drobitch, Sudip Majumder, Saswati Barman, Supriyo Bandyopadhyay, Anjan Barman
Summary: Through the use of time-resolved magneto-optical Kerr effect (TR-MOKE) microscopy, a study demonstrated the amplification of intrinsic spin-wave (SW) modes and the generation of new extrinsic or driven modes in a densely packed two-dimensional array of elliptical Co nanomagnets fabricated on a piezoelectric LiNbO3 substrate induced by surface-acoustic-wave (SAW). The magnetoelastic coupling led to a variety of SW phenomena, with amplification of intrinsic modes and generation of new extrinsic modes observed when the SAW was launched along the major axis, while a dominant driven mode appeared when the SAW was launched along the minor axis.
Article
Computer Science, Information Systems
Supriyo Bandyopadhyay
Summary: The development of nanomagnetic logic has not achieved the initial expected success, despite enthusiastic proclamations, there is currently no viable commercial nanomagnetic logic chip. The article points out misconceptions, flaws in proposals, and potential challenges that may hinder progress in this field.