Article
Chemistry, Multidisciplinary
Xi Yang, Dong Su, Xie Yu, Pei Zeng, Huageng Liang, Guangzu Zhang, Boxiang Song, Shenglin Jiang
Summary: The controllable nanogap structures enable strong and adjustable localized surface plasmon resonance (LSPR). A novel hierarchical plasmonic nanostructure (HPN) is created using colloidal lithography with a rotating coordinate system. The HPN increases the density of hot spots and enhances LSPR tunability and field enhancement. The hot spot engineering strategy of HPNs is demonstrated in surface-enhanced Raman spectroscopy (SERS) applications and allows single-molecule level detection and long-range mapping, providing a platform and guidance for various LSPR applications.
Review
Chemistry, Multidisciplinary
Bin Ai, Yujing Sun, Yiping Zhao
Summary: This review provides an overview of plasmonic hydrogen sensors (PHS) based on nanostructures. PHS offer high sensitivity, fast response speed, miniaturization, and high-degree of integration. The review discusses the working principle, sensing properties, and the effects of resonance mode, configuration, material, and structure on the sensing performances. It also summarizes the advantages and disadvantages of different types of plasmonic nanostructures and proposes potential development directions. The aim of this review is to clarify current strategies for PHS and provide a comprehensive understanding of their working principle to inspire innovative designs and execution of advanced hydrogen sensors.
Article
Nanoscience & Nanotechnology
Yoel Negrin-Montecelo, Adbelrhaman Hamdeldein Ahmed Geneidy, Alexander O. Govorov, Ramon A. Alvarez-Puebla, Lucas V. Besteiro, Miguel A. Correa-Duarte
Summary: Photocatalysis is a promising alternative energy technology that converts solar energy into chemical products. This study explores the use of plasmonic materials to sensitize traditional semiconductor photocatalysts. Using CdS quantum dots as a bridging system, energy from Au nanostructures is transferred to TiO2 nanoparticles, resulting in significantly accelerated reactions. The study highlights the importance of the morphology of the Au nanoparticles in their photosensitizing capabilities.
Article
Chemistry, Multidisciplinary
Bela Lovasz, Peter Sandor, Gellert-Zsolt Kiss, Balazs Banhegyi, Peter Racz, Zsuzsanna Papa, Judit Budai, Christine Prietl, Joachim R. Krenn, Peter Dombi
Summary: This study explores nonadiabatic nano-optical electron tunneling in the transition region between multiphoton-induced emission and adiabatic tunnel emission in the near-field of plasmonic nanostructures. The measured photoemission spectra exhibit strong-field recollision driven by the nanoscale near-field for Keldysh gamma values between approximately 1.3 and approximately 2.2. At the same time, the photoemission yield shows a constant nonlinearity in intensity scaling, which is characteristic of multiphoton-induced emission.
Article
Optics
Mingjie Wang, Yang Li, Yutao Tang, Jiafei Chen, Rong Rong, Guixin Li, Tun Cao, Shumei Chen
Summary: This study reports on the use of nonlinear chiroptical holography using Pancharatnam-Berry phase controlled achiral metasurfaces. The proposed metasurface enables spin selective nonlinear chiroptical holography through the second harmonic process on gold plasmonic metasurfaces. This has significant implications for multifunctional wavefront engineering and optical information processing.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Catherine Sadatnajafi, Eugeniu Balaur, Brian Abbey
Summary: Optical metamaterials enable precise control of light at the nanoscale, attracting interest in various fields such as chemical sensing and photovoltaics. Plasmonic color filters can be used for direct optical imaging and characterization of ion implantation in thin films, providing valuable insights for electronic applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Tom A. W. Wolterink, Robin D. Buijs, Giampiero Gerini, A. Femius Koenderink, Ewold Verhagen
Summary: This study investigates the use of nanophotonic structures to accurately determine the position of nearby nanoscale objects with subwavelength accuracy. By perturbing the near-field environment of a metasurface transducer consisting of nano-apertures in a metallic film, the location of the nanoscale object is transduced into the transducer's far-field optical response. The research demonstrates two-dimensional localization of objects accurate to 24 nm across a 2 x 2 µm area by monitoring the scattering pattern of the nanophotonic near-field transducer and comparing it to reference data. Additionally, increasing complexity in the nanophotonic transducer allows for localization over a larger area while maintaining resolution by encoding more information on the object's position in the transducer's far-field response.
Article
Chemistry, Multidisciplinary
Jeong Won Kim, Nam Heon Cho, Ryeong Myeong Kim, Jeong Hyun Han, Seungwoo Choi, Seok Daniel Namgung, Hyeohn Kim, Ki Tae Nam
Summary: This study demonstrates the manipulation of the polarization state of light using chiral plasmonic nanostructures, which exhibit a strong chiroptic response with magnetic controllability. By reversing the magnetic field direction, the circular dichroism values can be tuned. The study also reveals the magnetic circular dichroism peaks induced by the gap structure and size-related surface plasmon resonance.
Article
Nanoscience & Nanotechnology
Miguel Martinez-Calderon, Baptiste Groussin, Victoria Bjelland, Eric Chevallay, Valentin N. Fedosseev, Marcel Himmerlich, Pierre Lorenz, Alejandro Manjavacas, Bruce A. Marsh, Holger Neupert, Ralf E. Rossel, Walter Wuensch, Eduardo Granados
Summary: This research proposes the use of direct-laser nanostructuring techniques on copper substrates to improve the efficiency and robustness of electron photoinjectors. By exciting localized surface plasmons, hot electrons are generated, leading to a significant increase in quantum efficiency. When combined with semiconductor thin-films, the efficiency is further enhanced.
Article
Chemistry, Multidisciplinary
Shuai Zu, Quan Sun, En Cao, Tomoya Oshikiri, Hiroaki Misawa
Summary: By studying gold nanorods, the spatiotemporal origin of plasmonic chiroptical responses was revealed, promoting a full understanding of the ultrafast chiral origin in complex nanostructures. This research opens a way to design chiroptical nanophotonic devices for spatiotemporal control of chiral light-matter interactions.
Article
Chemistry, Multidisciplinary
Sergejs Boroviks, Andrei Kiselev, Karim Achouri, Olivier J. F. Martin
Summary: We have demonstrated a nonlinear plasmonic metasurface that has a strongly asymmetric second-harmonic generation. The nonlinear scattering is efficient when excited in one direction, but it is suppressed when the excitation direction is reversed, creating a diode-like functionality. Experimental measurements show a significant extinction ratio of approximately 10 dB for second-harmonic generation with opposite excitations, and these findings are supported by full-wave simulations. The asymmetry in the material composition, achieved by using a combination of aluminum and silver, leads to a bianisotropic response of the system.
Article
Nanoscience & Nanotechnology
Yin-Jung Chang, Ko-Han Shih, Chun-Yu Hsiao
Summary: In this study, a novel hot-electron-based, non-trench-type photodetector exploiting pure photoexcitation in a thin aluminum film and leaky plasmonic modes at and between its heterojunctions is proposed, analyzed, and experimentally demonstrated. The device shows high external quantum efficiency and small active area. The optical absorption mechanism is unravelled through analysis and numerical computations, showing the significant contribution of leaky surface plasmon resonance and quasibound supermodes. The device achieves excellent performance at specific wavelengths and biases and could be applied in low-voltage, metal-based photodetection.
Article
Chemistry, Multidisciplinary
Lin Nan, Jesuus Giraldez-Martinez, Andrei Stefancu, Li Zhu, Min Liu, Alexander O. Govorov, Lucas V. Besteiro, Emiliano Cortes
Summary: This study investigates the influence of hot-spots on photocatalytic reactions by controlling the interparticle distances. It is found that reducing the gap can significantly increase the reaction rate, but further reduction in the distance does not improve the rate significantly. The findings provide valuable insights in designing novel plasmonic photocatalytic platforms.
Article
Chemistry, Multidisciplinary
M. Saad Bin-Alam, Joshua Baxter, Kashif M. Awan, Antti Kiviniemi, Yaryna Mamchur, Antonio Cala Lesina, Kosmas L. Tsakmakidis, Mikko J. Huttunen, Lora Ramunno, Ksenia Dolgaleva
Summary: Researchers have developed an RLC circuit model to estimate the nonlinear optical properties of meta-atoms, overcoming the current difficulty in determining their nonlinear optical properties. Results from different methods agree well, indicating that the RLC model can efficiently design nonlinear plasmonic metasurfaces.
Review
Chemistry, Physical
Mohsin Ijaz
Summary: Photocatalytic water splitting is a cheap and clean method for solar to hydrogen conversion. Plasmon excitations in metallic nanostructures enhance charge separation, absorption range, and optical density in semiconductors. Additional carriers generated from plasmon-decay can externally charge semiconductors, leading to enhanced photocatalytic hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Physics, Applied
Marvin M. Mueller, Miriam Kosik, Marta Pelc, Garnett W. Bryant, Andres Ayuela, Carsten Rockstuhl, Karolina Slowik
Summary: The article introduces a novel Energy-based Plasmonicity Index (EPI) and its application in characterizing resonances in graphene nanoantennas. Analysis of resonances in doped nanoantennas reveals that selected resonances may have a plasmonic nature under low doping limits, but the actual analysis reveals the opposite.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
D. Beutel, P. Scott, M. Wegener, C. Rockstuhl, I. Fernandez-Corbaton
Summary: The research demonstrates that by using helicity preserving photonic nanostructures, the ability to significantly enhance the optical rotation of elliptically polarized light can provide a more comprehensive understanding of the properties and structure of molecules.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Peter M. Piechulla, Bodo Fuhrmann, Evgeniia Slivina, Carsten Rockstuhl, Ralf B. Wehrspohn, Alexander N. Sprafke
Summary: This study demonstrates that hyperuniform disorder in arrays of high refractive index nanodisks allows both structure and form factor to impact light scattering patterns, offering novel ways to tailor light scattering effects. The scattering response from nearly hyperuniform interfaces can be utilized in a wide range of applications, representing a new class of advanced optical materials.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Dorota Grzelak, Martyna Tupikowska, David Vila-Liarte, Dominik Beutel, Maciej Baginski, Sylwia Parzyszek, Monika Gora, Carsten Rockstuhl, Luis M. Liz-Marzan, Wiktor Lewandowski
Summary: This study reports a method to prepare PCD thin films by melting and freezing a mixture of liquid crystal solution, chiral dopant, and gold nanoparticles, and demonstrates the fabrication of stretchable PCD films using a thermal nanoimprinting method. The PCD wavelengths can be tuned by varying the geometry of the Au NPs.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Optics
Aristeidis G. Lamprianidis, Xavier Zambrana-Puyalto, Carsten Rockstuhl, Ivan Fernandez-Corbaton
Summary: Recent experiments have shown strong directional coupling of light into waveguide modes. The symmetries and symmetry-breakings of the emitter-waveguide system play a crucial role in understanding this directional coupling. The concept of spin-momentum locking is generalized to explain the directional behavior, and a new selection rule controlling the coupling of electric(magnetic) multipolar emissions into waveguide modes is proposed.
LASER & PHOTONICS REVIEWS
(2022)
Article
Physics, Multidisciplinary
Joel Kuttruff, Alessio Gabbani, Gaia Petrucci, Yingqi Zhao, Marzia Iarossi, Esteban Pedrueza-Villalmanzo, Alexandre Dmitriev, Antonietta Parracino, Giuseppe Strangi, Francesco De Angelis, Daniele Brida, Francesco Pineider, Nicolo Maccaferri
Summary: The study shows that active nanophotonics can be achieved by controlling the optical anisotropy on the magneto-optical activity in nonmagnetic hyperbolic nanoparticles, leading to tunable magneto-optical activity across the visible and near infrared spectral range. This is driven by the coupling of metallic-induced electric and dielectric-induced magnetic dipolar optical modes with static magnetic fields.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Benedikt Zerulla, Marjan Krstic, Dominik Beutel, Christof Holzer, Christof Woell, Carsten Rockstuhl, Ivan Fernandez-Corbaton
Summary: Recent advances in fabrication techniques in nanoscience and molecular materials have opened up new possibilities for tailoring material properties in silico. Accurate and computationally efficient theoretical models are crucial for designing new materials and interpreting experimental results. This paper presents a multi-scale approach that combines quantum mechanical molecular simulations with solution of Maxwell's equations to compute the electromagnetic response of macroscopic devices containing molecular materials, providing insights into experimental results.
ADVANCED MATERIALS
(2022)
Correction
Multidisciplinary Sciences
Evgenia Rusak, Jakob Straubel, Piotr Gladysz, Mirko Goeddel, Andrzej Kedziorski, Michael Kuehn, Florian Weigend, Carsten Rockstuhl, Karolina Slowik
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Aso Rahimzadegan, Theodosios D. Karamanos, Rasoul Alaee, Aristeidis G. Lamprianidis, Dominik Beutel, Robert W. Boyd, Carsten Rockstuhl
Summary: Optical metasurfaces, composed of 2D scatterers, can control the properties of an incidence field. This article presents a theory that analytically links the properties of the scatterers to their optical response using the lattice coupling matrix. The proposed theoretical approach proves to be a powerful tool for designing and analyzing metasurfaces.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Benedikt Zerulla, Ramakrishna Venkitakrishnan, Dominik Beutel, Marjan Krstic, Christof Holzer, Carsten Rockstuhl, Ivan Fernandez-Corbaton
Summary: This article introduces a homogenization method based on the effective transition (T-) matrix, which allows for the computation of the response of arbitrarily shaped volumetric patchworks of structured molecular materials and metamaterials.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
Xuchen Wang, Mohammad Sajjad Mirmoosa, Viktar S. Asadchy, Carsten Rockstuhl, Shanhui Fan, Sergei A. Tretyakov
Summary: Photonic time crystals are artificial materials with spatially uniform but temporally varying electromagnetic properties. This study extends the concept of photonic time crystals to two-dimensional artificial structures called metasurfaces. By designing a microwave metasurface, the researchers confirmed the existence of momentum bandgaps and exponential wave amplification, demonstrating the potential of metasurfaces as a material platform for emerging photonic space-time crystals and for amplifying surface-wave signals in wireless communications.
Article
Optics
L. Kuhn, T. Repaen, C. Rockstuhl
Summary: The use of artificial neural networks in predicting electromagnetic fields has been limited by domain size and object shape restrictions. This study proposes the use of graph neural networks to solve Maxwell's equations, overcoming these limitations and providing size invariance and adaptability to any material shape or mesh structure.
Article
Optics
Dominik Beutel, Ivan Fernandez-Corbaton, Carsten Rockstuhl
Summary: The evaluation of lattice sums is necessary for analyzing the interaction between objects on a lattice. In electromagnetic scattering scenarios involving arrays of particles forming metamaterials, metasurfaces, or photonic crystals, Ewald's method can improve the convergence of lattice sums. This study presents a derivation of exponentially convergent series for the solutions of the Helmholtz equation, specifically for different dimensional cases and involving the interaction of sublattices. The derived formulas are applicable to various multipolar orders and have been validated through comparison with direct computation of lattice sums.
Article
Chemistry, Multidisciplinary
Benedikt Zerulla, Dominik Beutel, Christof Holzer, Ivan Fernandez-Corbaton, Carsten Rockstuhl, Marjan Krstic
Summary: This article introduces a novel multi-scale approach for simulating the nonlinear optical response of molecular materials. The approach combines ab initio quantum-chemical and classical Maxwell-scattering computations. By incorporating the first hyperpolarizability tensor computed with time-dependent density-functional theory into a multi-scattering formalism, the optical interaction between neighboring molecules is considered. The approach is versatile and accurate, making it suitable for exploring nonlinear photonic molecular materials in structured photonic environments in the future.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mateusz Pawlak, Maciej Baginski, Pablo Llombart, Dominik Beutel, Guillermo Gonzalez-Rubio, Ewa Gorecka, Carsten Rockstuhl, Jozef Mieczkowski, Damian Pociecha, Wiktor Lewandowski
Summary: This study discovered helical nanofilaments formed by liquid crystalline (LC) dimers depending on the parity of the alkyl linker, and investigated their formation mechanism through molecular dynamics simulations. The study also found that the assembly structure of gold nanoparticles doped into the LC matrix can be tuned by controlling the pitch of the helices. Furthermore, the impact of the assembly structure on the chiral optical properties of composites was investigated.
CHEMICAL COMMUNICATIONS
(2022)