Article
Chemistry, Multidisciplinary
Hidemasa Negoro, Hiroshi Sugimoto, Minoru Fujii
Summary: A colloidal suspension of photonic nanostructures with optical magnetism, called an optical metafluid, consists of high-refractive index dielectric nanospheres with magnetic-type Mie resonances in the optical frequency. Under the Kerker conditions, these nanospheres satisfy the electromagnetic duality symmetry condition and preserve the handedness of circularly polarized light. The helicity-preserving metafluid with these nanospheres enhances the local chiral fields and improves the sensitivity of chiral molecular sensing. In this study, we experimentally demonstrate that a solution of crystalline silicon nanospheres can exhibit both dual and anti-dual behaviors.
Article
Chemistry, Multidisciplinary
Jialong Peng, Hyeon-Ho Jeong, Michael Smith, Rohit Chikkaraddy, Qianqi Lin, Hsin-Ling Liang, Michael F. L. De Volder, Silvia Vignolini, Sohini Kar-Narayan, Jeremy J. Baumberg
Summary: This study introduces flexible active plasmonic metafilms constructed by printing electrochromic nanoparticles onto ultrathin metal films (<15 nm), providing low-power electrically driven color switching, and opening up potential for fully printed electrochromic devices. Differences in plasmonic mode excitation between nanoparticles and ultrathin metal films result in directional optical effects and dynamics where perceived upward and downward colorations can differ.
Article
Chemistry, Multidisciplinary
Janna Eaves-Rathert, Elena Kovalik, Chibuzor Fabian Ugwu, Bridget R. Rogers, Cary L. Pint, Jason G. Valentine
Summary: The electro-chemical lithiation of anatase TiO2 to Li0.5TiO2 (LTO) enables dynamic visible color tuning with reduced absorption at high frequencies. The dynamic tunability of TiO2 can be leveraged in a Fabry-Perot cavity and a gap plasmon metasurface, showing competitive performance with established actuators like WO3.
Article
Chemistry, Multidisciplinary
Liam Collard, Filippo Pisano, Di Zheng, Antonio Balena, Muhammad Fayyaz Kashif, Marco Pisanello, Antonella D'Orazio, Liset M. de la Prida, Cristian Ciraci, Marco Grande, Massimo De Vittorio, Ferruccio Pisanello
Summary: This paper discusses the integration of plasmonic structures on optical fibers and its potential applications. The turbidity of light propagation in multimode fibers hinders dynamic control of the coupling between guided light fields and plasmonic resonances. Utilizing the information of guided modes, the authors demonstrate the spatiotemporal control of plasmonic resonances by employing dynamic phase modulation.
Article
Chemistry, Physical
Christophe Pin, Hideki Fujiwara, Keiji Sasaki
Summary: This review discusses the recent developments in optical manipulation and sorting of nanomaterials using photonic and plasmonic devices. The techniques covered include optical transport and sorting using photonic waveguides, optical trapping and manipulation using photonic and plasmonic nanoresonators, and manipulation using metalenses and metasurfaces.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Bin Han, Bo Liu, Guanghui Wang, Qi Qiu, Zhe Wang, Yuying Xi, Yanxia Cui, Shufang Ma, Bingshe Xu, Hsien-Yi Hsu
Summary: In this study, a novel transparent stencil nanolithography (t-SL) technique is developed based on focused ion beam (FIB)-assisted polyethylene terephthalate (PET) direct patterning. The proposed t-SL enables ultrahigh lithography resolution down to 100 nm and accurate stencil mask alignment. By applying this lithographic technique to hybrid perovskites, a high-performance 2D hybrid perovskite heterostructure photodetector is fabricated.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Neuton Li, Jasper Cadusch, Amelia Liu, Anders J. Barlow, Ann Roberts, Kenneth B. Crozier
Summary: A computational algorithm is used to design plasmonic apertures for nanoparticle trapping, resulting in trapping forces significantly greater than traditional double nanohole designs. The designs are realized through experimental fabrication and studied using optical methods.
ADVANCED OPTICAL MATERIALS
(2021)
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
Chemistry, Multidisciplinary
Andrea Schirato, Andrea Mazzanti, Remo Proietti Zaccaria, Peter Nordlander, Alessandro Alabastri, Giuseppe Della Valle
Summary: This paper investigates the hot-electron dynamics in nanostructured materials upon irradiation with Is-laser pulses and explores the opportunities for ultrafast diffraction management through the inhomogeneous evolution of hot carriers. The design of a highly symmetric plasmonic metagrating capable of transient symmetry breaking and the control of recovery time for symmetric configurations are discussed in detail.
Article
Nanoscience & Nanotechnology
B. Abasahl, C. Santschi, T. Raziman, O. J. F. Martin
Summary: The paper provides a detailed overview of nanofabrication techniques for plasmonics, focusing on two different approaches for the fabrication of metallic nanostructures based on e-beam lithography. Ion beam etching produces smaller and more regular features, while the lift-off process can result in slightly fuzzy nanoclusters on the substrate. Both techniques exhibit spectral differences in scattering cross sections for structures supporting complex resonances, guiding researchers to choose the best suited approach for a given application.
Article
Optics
D. Fomra, M. Mamun, K. Ding, V Avrutin, U. Ozgur, N. Kinsey
Summary: A mechanically robust metasurface with plasmonic colors in the visible and near-IR spectrum has been designed, fabricated, and characterized. Utilizing TiN layers and sub-wavelength apertures, the structures exhibit extraordinary transmission and withstand high levels of mechanical stress, making them suitable for nanoscale security features.
Article
Engineering, Electrical & Electronic
Z. Jalilian, R. Moradian
Summary: This study investigates the effect of copper and titanium dioxide nanoparticles as a substrate on the optical response of double negative-index plasmonic metamaterials layers. The thin-film characterizations were analyzed using various techniques, and the optical properties of the films were described using the film matrix method, confirming the optical gain property of the fabricated layers.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Yuto Moritake, Masaaki Ono, Masaya Notomi
Summary: Topological photonics mimicking topological insulators has attracted significant attention. In this study, we experimentally observed the photonic topological edge states of zigzag plasmonic chains composed of metal nanodiscs in the optical region through far-field imaging. We also propose and investigate connected chains, which showed similar topological edge states.
Review
Nanoscience & Nanotechnology
Sam Lin, Yixin Chen, Zi Jing Wong
Summary: The ability to control and steer optical beams is crucial for various emerging technologies. Chip-scale photonic platforms offer faster, smaller, lighter, and more energy-efficient mechanisms to manipulate light. Recent advancements in nanophotonics have enabled high-performance optical beam steering, opening up new possibilities in optical applications, communication, and displays.
Article
Engineering, Electrical & Electronic
Mohammad Reza Rakhshani
Summary: This study investigates the design of a localized surface plasmon resonance (LSPR)-based sensor using a narrowband metamaterial absorber with a gold nanoparticle array. The LSPR-based sensor has various applications in clinical analysis and environmental monitoring. Simulation results show that the proposed structure has a absorption bandwidth of 5.7nm, indicating high efficiency and accuracy in detection. Additionally, as a refractive index sensor, it exhibits a sensitivity of S = 964nm/RIU and a large figure of merit (FOM = 1.653 x 10(4) RIU-1). The proposed design is polarization independent, eliminating the need for polarization requirements in equipment. Furthermore, the array is demonstrated as a biosensor for label-free clinical sensing, particularly for virus detection.
IEEE SENSORS JOURNAL
(2022)
