Article
Chemistry, Multidisciplinary
Lakshmi Raju, Kyu-Tae Lee, Zhaocheng Liu, Dayu Zhu, Muliang Zhu, Ekaterina Poutrina, Augustine Urbas, Wenshan Cai
Summary: This research demonstrates the use of a deep learning framework to create an optimal design for a nonlinear metamaterial, maximizing its nonlinear effect. A nanolaminate metamaterial is used for validation, showing the effectiveness of the deep learning algorithm.
Review
Chemistry, Multidisciplinary
Aurelian John-Herpin, Andreas Tittl, Lucca Kuhner, Felix Richter, Steven H. Huang, Gennady Shvets, Sang-Hyun Oh, Hatice Altug
Summary: Infrared spectroscopy provides unique information on the composition and dynamics of biochemical systems. Nanophotonics, utilizing resonant nanostructures, enhances light-matter interaction, pushing the sensitivity limits of traditional far-field spectroscopy. Metasurfaces composed of resonators further expand the design space for tailoring nanoscale light control, establishing them as valuable tools in surface-enhanced spectroscopy. This article showcases various resonator geometries, materials, and arrangements for highly sensitive metadevices, and highlights advanced sensor functionalities.
ADVANCED MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Jolly Xavier, Deshui Yu, Callum Jones, Ekaterina Zossimova, Frank Vollmer
Summary: Quantum-enhanced sensing and metrology offer promising pathways to meet the current demands for integrated chips by utilizing quantum optical measurement schemes for precise measurements of optical properties. These non-classical measurement techniques, based on phenomena like entanglement and squeezing of optical probe states, can also revolutionize biosensing applications and pave the way for integrated quantum optical bioscience laboratories.
Article
Chemistry, Multidisciplinary
Eitan Oksenberg, Ilan Shlesinger, Gokcen Tek, A. Femius Koenderink, Erik C. C. Garnett
Summary: The surface-enhanced counterparts of Raman scattering (SERS) and infrared (IR) absorption (SEIRAS) are commonly used to probe and identify nanoscale matter and small populations of molecules. In this study, a complementary surface-enhanced vibrational spectroscopy approach is presented to probe the vibrational signature of metal-bound molecular monolayers. Nanocavities are designed and produced with sharp and tunable visible (VIS) and mid-IR gap resonances by placing nanorods on a mirror that is coated with a thin dielectric spacer.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Peng Mao, Changxu Liu, Yubiao Niu, Yuyuan Qin, Fengqi Song, Min Han, Richard E. Palmer, Stefan A. Maier, Shuang Zhang
Summary: Materials exhibit diverse responses to incident light based on their unique dielectric functions, with the optical response in nanotechnology being influenced by both material properties and geometric structures. The advancement of nanotechnology has led to significant progress in optical structures with feature sizes smaller than the optical wavelength, resulting in flourishing developments in plasmonics and photonic crystals. A counterintuitive system consisting of plasmonic nanostructures composed of different materials but exhibiting almost identical reflection has been proposed, highlighting the insensitivity of the optical response to different plasmonic materials.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Aurelian John-Herpin, Deepthy Kavungal, Lea von Mucke, Hatice Altug
Summary: This study introduces a deep learning-augmented nanoplasmonic technique that can accurately discriminate between major classes of biomolecules without disrupting native processes.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Thang Minh Nguyen, YongDeok Cho, Ji-Hyeok Huh, Hayun Ahn, NaYeoun Kim, Kyung Hun Rho, Jaewon Lee, Min Kwon, Sung Hun Park, ChaeEon Kim, Kwangjin Kim, Young-Seok Kim, Seungwoo Lee
Summary: Researchers developed a new type of nanomembrane as a substrate for dark-field microscopy, overcoming the optical loss and edge scattering issues associated with conventional TEM grids.
Article
Chemistry, Multidisciplinary
Andrea Schirato, Giulia Crotti, Mychel Goncalves Silva, Danielle Cristina Teles-Ferreira, Cristian Manzoni, Remo Proietti Zaccaria, Paolo Laporta, Ana Maria de Paula, Giulio Cerullo, Giuseppe Della Valle
Summary: The transient optical response of plasmonic nanostructures is important for studying light harvesting, photocatalytic processes, nonlinear nanophotonics, and all-optical modulation. However, under a nonperturbative excitation regime, the correspondence between the temporal evolution of the dynamic optical signal and the photoexcited hot electrons is not valid.
Article
Chemistry, Multidisciplinary
Thang Minh Nguyen, YongDeok Cho, Ji-Hyeok Huh, Hayun Ahn, NaYeoun Kim, Kyung Hun Rho, Jaewon Lee, Min Kwon, Sung Hun Park, ChaeEon Kim, Kwangjin Kim, Young-Seok Kim, Seungwoo Lee
Summary: This study demonstrates the use of a freely suspended ultrathin and wide-scale transparent nanomembrane as a substrate for dark-field microscopy, which addresses challenges posed by conventional TEM grids such as optically lossy carbon layer and broadband scattering from the edges.
Article
Chemistry, Multidisciplinary
Eui-Sang Yu, Sang-Hun Lee, Geon Lee, Q-Han Park, Aram J. Chung, Minah Seo, Yong-Sang Ryu
Summary: Vertically aligned nanogap-hybridized metasurfaces can efficiently trap traveling nanoparticles in the sensing region, enabling the real-time monitoring of nanoparticle assemblies in liquids. This approach, together with electric tweezing via optical hotspots, shows promise for underwater THz analysis and understanding physicochemical events within a broad wavelength regime.
Article
Chemistry, Multidisciplinary
Calvin Brown, Artem Goncharov, Zachary S. Ballard, Mason Fordham, Ashley Clemens, Yunzhe Qiu, Yair Rivenson, Aydogan Ozcan
Summary: This study demonstrates a deep learning-based spectral reconstruction framework using a compact and low-cost on-chip sensing scheme that overcomes the limitations set by size, cost, signal-to-noise ratio, and spectral resolution in conventional spectrometers. The system accurately reconstructs unknown spectra and is suitable for applications that require cost-effective, portable, and high-resolution spectroscopy tools.
Review
Physics, Multidisciplinary
Davide Piccinotti, Kevin F. MacDonald, Simon Gregory, Ian Youngs, Nikolay Zheludev
Summary: The review discusses the application of artificial intelligence in photonics, nanophotonics, plasmonics, and photonic materials discovery, including metamaterials, and addresses future opportunities in these fields.
REPORTS ON PROGRESS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Kevin M. Roccapriore, Maxim Ziatdinov, Shin Hum Cho, Jordan A. Hachtel, Sergei Kalinin
Summary: The correlation between local nanoparticle geometries and their plasmonic responses is established using encoder-decoder neural networks in this study. The simplified descriptions allow high-accuracy predictions of local responses based on geometries, paving the way for stochastic design of nanoplasmonic structures. This approach creates a path towards determining configurations that yield the spectrum closest to the desired one.
Review
Nanoscience & Nanotechnology
Li Gao, Yurui Qu, Lianhui Wang, Zongfu Yu
Summary: This article introduces a new type of spectrometer that relies on computational technique for spectral information recovery. It differs from conventional optical spectrometers and is well suited for low-cost, miniaturized, and application-specific requirements. The article reviews the recent progress in computational spectrometers and identifies future directions for development.
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.
Review
Chemistry, Multidisciplinary
Aurelian John-Herpin, Andreas Tittl, Lucca Kuhner, Felix Richter, Steven H. Huang, Gennady Shvets, Sang-Hyun Oh, Hatice Altug
Summary: Infrared spectroscopy provides unique information on the composition and dynamics of biochemical systems. Nanophotonics, utilizing resonant nanostructures, enhances light-matter interaction, pushing the sensitivity limits of traditional far-field spectroscopy. Metasurfaces composed of resonators further expand the design space for tailoring nanoscale light control, establishing them as valuable tools in surface-enhanced spectroscopy. This article showcases various resonator geometries, materials, and arrangements for highly sensitive metadevices, and highlights advanced sensor functionalities.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Emiliano Cortes, Fedja J. Wendisch, Luca Sortino, Andrea Mancini, Simone Ezendam, Seryio Saris, Leonardo de S. Menezes, Andreas Tittl, Haoran Ren, Stefan A. Maier
Summary: This review outlines the impact, opportunities, applications, and challenges of optical metasurfaces in converting the energy of incoming photons into frequency-shifted photons, phonons, and energetic charge carriers.
Article
Multidisciplinary Sciences
Lucca Kuehner, Luca Sortino, Rodrigo Berte, Juan Wang, Haoran Ren, Stefan A. Maier, Yuri Kivshar, Andreas Tittl
Summary: The authors have developed a nanophotonic platform for enhanced on-chip biomolecular sensing and nonlinear light generation. This platform features high-Q resonances and a small spatial footprint. They have successfully demonstrated its applications in sensitive biomolecular detection and enhanced second-harmonic generation.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Thomas Dinter, Chenhao Li, Lucca Kuehner, Thomas Weber, Andreas Tittl, Stefan A. Maier, Judith M. Dawes, Haoran Ren
Summary: This study demonstrates the use of an ultrathin OAM mode-sorting metasurface for characterizing the breakdown of OAM orthogonality under different turbulence conditions. The metasurface exhibits strong OAM selectivity and allows the measurement of the whole OAM spectrum at the same time.
Article
Chemistry, Multidisciplinary
Lucca Kuehner, Luca Sortino, Benjamin Tilmann, Thomas Weber, Kenji Watanabe, Takashi Taniguchi, Stefan A. Maier, Andreas Tittl
Summary: All-dielectric optical metasurfaces with high-Q resonances throughout the visible spectrum have been achieved by leveraging symmetry-broken quasi bound states in the continuum (qBICs). These qBIC resonances effectively suppress radiation losses, allowing for the use of low-index van der Waals materials such as hexagonal boron nitride (hBN). The experimental results also demonstrated enhanced second-harmonic generation using the high-Q resonances.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Andreas Aigner, Andreas Tittl, Juan Wang, Thomas Weber, Yuri Kivshar, Stefan A. Maier, Haoran Ren
Summary: Researchers have designed and successfully fabricated plasmonic nanofin metasurfaces, which play a crucial role in nanophotonics. By manipulating the geometric parameters, they achieved high-quality factor modes and demonstrated powerful performance in molecular sensing. The precise control of light-matter interactions is essential in this study. This research provides a new approach for enhancing light-matter interactions in various applications.
Article
Chemistry, Multidisciplinary
Luca M. Berger, Malo Duportal, Leonardo de Souza Menezes, Emiliano Cortes, Stefan A. Maier, Andreas Tittl, Katharina Krischer
Summary: Electrocatalysis is crucial for achieving a zero-carbon future and driving research in hydrogen generation and carbon dioxide reduction. Surface-enhanced infrared absorption spectroscopy (SEIRAS) is a suitable method for investigating electrocatalytic processes but has limitations in detecting short-lived intermediates. A new nanophotonic-electrochemical SEIRAS platform has been developed to overcome these limitations and provide a deeper understanding of catalytic reactions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Rodrigo Berte, Thomas Weber, Leonardo de Souza Menezes, Lucca Kuehner, Andreas Aigner, Martin Barkey, Fedja Jan Wendisch, Yuri Kivshar, Andreas Tittl, Stefan A. Maier
Summary: Breaking the in-plane geometric symmetry of dielectric metasurfaces allows access to a set of electromagnetic states called symmetry-protected quasi-bound states in the continuum (qBICs). We demonstrate that qBICs can also be accessed by breaking the symmetry in the permittivity of the materials. Weak permittivity modulations due to carrier doping, and electro-optical Pockels and Kerr effects, can enable infinitesimal permittivity asymmetries for on-demand, dynamically tunable resonances of extremely high quality factors.
Article
Chemistry, Physical
Thomas Weber, Lucca Kuehner, Luca Sortino, Amine Ben Mhenni, Nathan P. Wilson, Julius Kuehne, Jonathan J. Finley, Stefan A. Maier, Andreas Tittl
Summary: In this study, strong coupling in bound state in the continuum metasurfaces on nanostructured bulk WS2 is demonstrated, with sharp resonances, tailored linewidths, and controllable light-matter coupling strength.
Article
Optics
Juan Wang, Thomas Weber, Andreas Aigner, Stefan A. Maier, Andreas Tittl
Summary: This article introduces a new method that combines mirror-coupled resonances with the loss engineering capabilities of plasmonic quasi-bound states in the continuum to tailor the light-matter interaction in different coupling regimes. The study demonstrates the application of a pixelated plasmonic perfect absorber metasurface for multispectral surface-enhanced molecular spectroscopy over a broad range of mid-infrared wavenumbers using a single gap size.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Dmytro Gryb, Fedja J. Wendisch, Andreas Aigner, Thorsten Goelz, Andreas Tittl, Leonardo de S. Menezes, Stefan A. Maier
Summary: This study presents one of the geometrically simplest two-dimensional chiral metasurface platforms by arranging achiral dielectric rods in a square lattice and creating chirality through rotating individual meta-atoms. The chiroptical responses obtained from this design are stronger or comparable to more complex designs. Additionally, it is found that the resonances dependent on the arrangement are robust against geometric variations and exhibit similar behavior in experiments and simulations.
Article
Materials Science, Multidisciplinary
Luca M. Berger, Martin Barkey, Stefan A. Maier, Andreas Tittl
Summary: This article investigates an emerging class of metasurfaces that can control the coupling between bound states in the continuum (BICs) and the far field. It is demonstrated experimentally that these metasurfaces sustain angular-robust quasi-BICs in the mid-infrared spectral region. Compared to conventional alternatives, these metasurfaces exhibit superior performance, making them promising for applications in bio-sensing, optical devices, and photonic devices using focused light.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Lucca Kuehner, Fedja J. Wendisch, Alexander A. Antonov, Johannes Buerger, Ludwig Huettenhofer, Leonardo de S. Menezes, Stefan A. Maier, Maxim V. Gorkunov, Yuri Kivshar, Andreas Tittl
Summary: This research introduces a novel nanofabrication approach to effectively control resonance features and nanophotonic functionalities in all-dielectric metasurfaces by unlocking the height of individual resonators. Using this approach, an optical all-dielectric metasurface with maximum intrinsic chirality is demonstrated, which selectively responds to light of a particular circular polarization depending on the structural handedness.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Gianni Q. Moretti, Andreas Tittl, Emiliano Cortes, Stefan A. Maier, Andrea Bragas, Gustavo Grinblat
Summary: The dielectric metasurfaces supporting high-Q quasi-bound states in the continuum require high fabrication precision, which can be relaxed by incorporating a relatively large perturbative element close to high-symmetry points of an undistorted BIC metasurface. This approach has been validated by adding a cylinder between two reflection-symmetry points in an elliptical disk metasurface unit cell, resulting in high-Q resonances.
ADVANCED PHOTONICS RESEARCH
(2022)
