Article
Chemistry, Multidisciplinary
Yicong Ma, Chao Lin, Linfeng Cai, Geping Qu, Xiaopeng Bai, Lin Yang, Zhifeng Huang
Summary: Understanding the thermal stability of metallic chiral nanoparticles is crucial for their application as asymmetric catalysts. This study demonstrates a method to enhance the thermal stability of silver chiral nanoparticles through alloying with aluminum and surface coverage, paving the way for their use in high-temperature asymmetric catalysis.
Review
Chemistry, Analytical
Sarjana Yadav, Sneha Senapati, Samir Kumar, Shashank K. Gahlaut, Jitendra P. Singh
Summary: Glancing angle deposition (GLAD) is a technique for fabricating sculpted micro- and nanostructures with high sensitivity and enhanced optical and catalytic properties. GLAD-based nanostructures have broad applications in sensing, especially in the biomedical field. This review discusses the effects of morphology and deposition conditions on GLAD structures, their biosensing capability, and their use in various biosensing applications.
Article
Chemistry, Multidisciplinary
Lin Yang, Yicong Ma, Chao Lin, Geping Qu, Xiaopeng Bai, Zhifeng Huang
Summary: This study immobilizes liquid metal Ga nanoparticles on the surface of SiO2 nanohelices, forming chirality structures with chiroplasmonic optical activity. The chiroplasmonic optical activity shows high environmental stability and is stabilized by spontaneous oxidation of the Ga nanoparticles.
Review
Chemistry, Multidisciplinary
Jang-Hwan Han, Doeun Kim, Juhwan Kim, Gyurin Kim, Peer Fischer, Hyeon-Ho Jeong
Summary: Physical shadow growth is a vacuum deposition technique that allows the fabrication of various 3D-shaped nanoparticles and structures using a wide range of materials. Recent advancements in controlling the shadow effect at the nanoscale has expanded the capabilities of nanomaterials to include complex 3D-shaped hybrid nanoparticles and structures. By engineering the shape and material composition, plasmonically active nanomaterials with unique physical and chemical properties can be created. This review discusses the recent progress in the development of shadow growth techniques for hybrid plasmonic nanomaterials, describing how fabrication enables engineered material responses and highlighting novel functions. Potential applications in photonic devices, biomedicine, and chiral spectroscopy are also discussed.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Xiu Yang, Shanshan Huang, Rohit Chikkaraddy, Eric S. A. Goerlitzer, Feiliang Chen, Jinglei Du, Nicolas Vogel, Thomas Weiss, Jeremy J. Baumberg, Yidong Hou
Summary: Low-cost and large-area chiral metamaterials (CMs) are highly desired for practical applications. In this study, a uniform large-area colloidal particle array was fabricated by interface-mediated self-assembly, and the handedness of chiral plasmonic shells (CPSs) was precisely controlled using glancing angle deposition (GLAD). The CPSs showed strong chiroptical signals and excellent sensor performance in detecting chiral molecules due to the formation of uniform superchiral fields.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Aditya Garg, Elieser Mejia, Wonil Nam, Meitong Nie, Wei Wang, Peter Vikesland, Wei Zhou
Summary: Scalable nanofabrication of microporous multiresonant plasmonic meshes (MMPMs) is achieved via a hierarchical micro-/nanoimprint lithography approach. These meshes demonstrate broadband nonlinear nanoplasmonic enhancement and can be used as bio-interfaced surface-enhanced Raman spectroscopy sensors.
Article
Chemistry, Multidisciplinary
Yidong Hou, Meng Qiu, Zhaolong Cao, Jie Zhou, Hock Chun Ong, Wei Jin, Jinglei Du, Dangyuan Lei
Summary: This study demonstrates that propagating surface plasmon polaritons can significantly enhance the Q-factors of localized surface plasmon resonance related circular dichroism in plasmonic lattices with chiral unit cells. The interaction between dispersive achiral SPPs and nondispersive chiral LSPR results in the formation of hybrid chiral SPPs, allowing efficient tuning of transmission CD dispersion and signal intensity.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yicong Ma, Lin Yang, Xiangchen Hu, Miao Zhang, Geping Qu, Xiaopeng Bai, Haifeng Sun, Feng Zhu, Xiaoyan Zhong, Xiao Chen, Zongxiang Xu, Yi Yu, Zhifeng Huang
Summary: Structural chirality is introduced into nano-alloys to enhance their properties. Layer-by-layer glancing angle deposition is used to synthesize chiral nanoparticles with multiple elements at a low substrate temperature, leading to the amplification of chiroplasmonic optical activities. This approach has the potential to be applied in asymmetric catalysis for the synthesis of enantiomers with specific chirality.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Biophysics
Xun Lu, Seongmin Lee, Jun Kim, Naseem Abbas, Mohsin Ali Badshah, Seok-min Kim
Summary: A selective fabrication method of Ag nanorods on the microcolumn structure using the GLAD process was proposed to enhance the signal-to-background noise ratio of the metal-enhanced fluorescence substrate.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Biochemistry & Molecular Biology
Lijian Meng, Tao Yang
Summary: Nanostructured TiO2 films were deposited on Indium Tin Oxide (ITO) and glass substrates using dc reactive magnetron sputtering at various substrate inclination angles. The structural and optical properties of the films were analyzed using X-ray diffraction, scanning electron microscopy, and UV-Vis spectrophotometer. Dye-sensitized solar cells (DSSC) were constructed with these TiO2 films as photoelectrodes, and the impact of substrate inclination angle during film preparation on DSSC conversion efficiency was investigated.
Article
Chemistry, Multidisciplinary
Ting Xiao, Jie Zhao, Peng Sun, Peng Li, Yaokang Zhang, Ni Zhao, Zhiwei Ren, Gang Li, Zhifeng Huang, Zijian Zheng
Summary: The study introduces a new type of broadband-transmitting built-in TiO2 metalens that can enhance the sensitivity, speed, and efficiency of photodetectors.
Article
Multidisciplinary Sciences
Xin-Xian Wu, Cheng-Yu Lu, Tsung-Yu Huang
Summary: In this study, an oblique-flat-sheet metamaterial perfect absorber (MPA) was designed to enhance the sensitivity of a biosensor. By simulating and conducting experiments, it was confirmed that the MPA had higher sensitivity.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Khushboo Bukharia, Prasanta Karmakar, Pallavi Pandit, Ajay Gupta
Summary: The study found that oblique angle deposition results in columnar growth of magnetic nanowires with a well-defined uniaxial magnetic anisotropy, where the easy axis of magnetization is tilted by an angle of 25 degrees.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Mahsa Fakharpour, Fahimeh Abrinaei
Summary: Helical manganese oxide nanostructures were successfully deposited on glass substrate using glancing angle deposition and electron-beam evaporation technique. Characterization techniques including X-ray diffraction, FESEM imaging, and FTIR spectroscopy confirmed the successful growth of the nanostructured thin film. The optical properties and nonlinear optical behavior of the helical manganese oxide nanostructures were investigated, revealing their potential as nanophotonic devices.
Article
Nanoscience & Nanotechnology
Ye Wang, Jiongdong Zhao, Yu Zhu, Shurong Dong, Yang Liu, Yijun Sun, Liling Qian, Wenting Yang, Zhen Cao
Summary: This study presents integrated nanorod arrays on microfluidic chips for fast and sensitive flow-through immunoassays of physiologically relevant macromolecules. The plasmonic structure significantly improves the detection limit of cTnI assay and enables simultaneous detection of multiple cancer biomarkers. This ultrasensitive detection is achieved through large surface area for antibody conjugation and metal-enhanced fluorescent signals.
MICROSYSTEMS & NANOENGINEERING
(2021)
Editorial Material
Computer Science, Information Systems
Victor Pacheco-Pena
Article
Multidisciplinary Sciences
Joseph Arnold Riley, Noel Healy, Victor Pacheco-Pena
Summary: The paper explores the applications of plasmonic lenses in controlling and manipulating the propagation of surface plasmons. Two different plasmonic lens structures are designed and evaluated, showing improved power enhancement compared to convex-planar lenses. The study also reveals a decrease in the depth of focus when using meniscus lenses.
SCIENTIFIC REPORTS
(2022)
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
Alessandro Ventisei, Alex Yakovlev, Victor Pacheco-Pena
Summary: Most current computing technology relies on semiconductor-based devices, but recent advances in optical computing have shown the potential of waveguides for high-speed switching and routing of TEM square pulses, providing new solutions for computing. This work introduces a new modeling approach using Petri-Nets to study the interaction of TEM square pulses in interconnected waveguides, paving the way for the design of electromagnetic wave-based computing systems.
ADVANCED THEORY AND SIMULATIONS
(2022)
Article
Physics, Applied
Miguel Beruete, Nader Engheta, Victor Pacheco-Pena
Summary: This study investigates an all metallic sensor based on epsilon-near-zero (ENZ) metamaterials at microwave frequencies. The performance of the sensor is evaluated by placing subwavelength dielectric analytes within the ENZ waveguide. The sensor demonstrates high sensitivities in detecting deeply subwavelength dielectric bodies.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Ruben A. Alves, Victor Pacheco-Pena, Miguel Navarro-Cia
Summary: This paper proposes the use of the Madelung form of the hydrodynamic Drude model to tackle the modeling challenge posed by current multiscale plasmonic systems. By incorporating the quantum effect electron spill-out through the description of the metal-dielectric interface using a super-Gaussian function, good qualitative agreement was achieved between the results from a two-dimensional nanoplasmonic wedge and nonlocal full-wave numerical calculations. A conformal transformation perspective is also provided to explain the findings.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Optics
Wasem Aljuaid, Joseph Arnold Riley, Noel Healy, Victor Pacheco-Pena
Summary: In this manuscript, a method for high spatial resolution focusing of electromagnetic waves at telecommunication wavelengths using high-refractive index mesoscale dielectrics is presented. Experimental results demonstrate the effectiveness and potential application value of this method.
Article
Materials Science, Multidisciplinary
Victor Pacheco-Pena, Diego M. Solis, Nader Engheta
Summary: This opinion article provides a brief summary of the background materials and recent developments in the field of temporal and spatiotemporal media, and offers opinions on potential challenges, opportunities, and open research questions for manipulating fields and waves in four dimensions.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Tony Knightley, Alex Yakovlev, Victor Pacheco-Pena
Summary: In this study, multilayer metamaterials (MTMs) are designed using a neural network algorithm to calculate the derivative of temporally modulated signals. The results show that the proposed algorithm can quickly search for the optimal structure and achieve excellent agreement with theoretical values.
ADVANCED OPTICAL MATERIALS
(2023)
Editorial Material
Optics
Paloma A. Huidobro, M. Zahirul Alam, Nader Engheta, Victor Pacheco-Pena
Summary: Temporal modulation of material parameters provides new possibilities and directions in the research of metamaterials, metasurfaces, and wave-matter interactions. The breaking of time reversal symmetry in time-varying media can lead to novel physical effects with potential applications. The rapid advancement of theoretical and experimental aspects in this field expands our understanding of wave propagation in complex spatiotemporal platforms.
Article
Engineering, Electrical & Electronic
Victor Pacheco-Pena, Nader Engheta
Summary: While wave-matter interactions can be tailored in space, temporal and spacetime media enable full control of electromagnetic waves in four dimensions. This study combines spatial multilayered media with temporal multistepped changes of the permittivity and presents a theoretical formulation and closed-form expressions for the effective permittivity of such spacetime effective media. Numerical simulations demonstrate the possibility of designing spacetime effective media using a combination of temporally and spatially modulated materials, offering new possibilities for manipulating wave-matter interaction in 4D.
IEEE ANTENNAS AND PROPAGATION MAGAZINE
(2023)
Article
Optics
Inigo Liberal, J. Enrique Vazquez-Lozano, Victor Pacheco-Pena
Summary: The quantum optical response of antireflection temporal coatings (ATCs), which suppress the generation of backward waves in temporal boundaries, is investigated. The results show that quantum ATCs induce a frequency shift of the quantum state while preserving all photon statistics intact. They can be applied for fast quantum frequency shifting in photonic quantum networks. Furthermore, quantum ATCs allow for fast temporal switching without amplification of thermal fields.
LASER & PHOTONICS REVIEWS
(2023)
Editorial Material
Physics, Multidisciplinary
Victor Pacheco-Pena
Summary: Time-varying photonics enables unprecedented control of light-matter interactions. An experiment with photonic time interfaces demonstrates broadband coherent wave control.
Article
Automation & Control Systems
Ross Glyn MacDonald, Alex Yakovlev, Victor Pacheco-Pena
Summary: This article proposes a new technique for performing computational tasks using wave-based devices, which involves the linear splitting and superposition of multiple pulses to achieve information switching and routing. By developing a comparator and a pulse director, the potential of this technique is demonstrated.
ADVANCED INTELLIGENT SYSTEMS
(2022)
Article
Materials Science, Multidisciplinary
Victor Pacheco-Pena, Nader Engheta
Summary: The study introduces the concept of temporal equivalent of the Brewster angle, which leads to forward wave transmission and backward wave elimination by rapidly changing the permittivity of the medium. This method offers a new perspective on controlling electromagnetic wave propagation and wave-matter interactions in real time using temporal metamaterials.