Article
Chemistry, Physical
Xi Wang, Xiaowei Zhang, Jiayi Zhu, Heonjoon Park, Yingqi Wang, Chong Wang, William G. Holtzmann, Takashi Taniguchi, Kenji Watanabe, Jiaqiang Yan, Daniel R. Gamelin, Wang Yao, Di Xiao, Ting Cao, Xiaodong Xu
Summary: The authors report the emergence of intercell moire exciton complexes in H-stacked WS2/WSe2 heterobilayers, where the exciton's hole from the WSe2 layer is surrounded by its bound electron's wavefunction distributed among three adjacent moire traps in the WS2 layer exhibiting an out-of-plane dipole and in-plane quadrupole. This work provides insights into and possibilities for engineering emergent exciton many-body states in correlated moire charge orders.
Article
Optics
Jawahar Prabhakar Desai, Ravi Kumar, Joseph Rosen
Summary: In this Letter, a new method for optical incoherent synthetic aperture (SA) imaging is proposed and demonstrated. By scanning only along the perimeter of the SA and utilizing the phase difference between sub-apertures, similar imaging performance as direct imaging can be achieved. Experimental results show comparable imaging capabilities to direct imaging with the aperture size of the SA, and a comparison with annular and full aperture direct imaging is presented.
Article
Physics, Applied
Tal I. Sommer, Ori Katz
Summary: The ultrasound pixel-reassignment (UPR) technique adapts the pixel-reassignment method from confocal fluorescent microscopy to improve resolution and signal to noise ratio in ultrasound imaging. The theoretical analysis and experimental evaluation demonstrate a 25% resolution improvement and 3 dB SNR improvement in in vitro scans without any hardware or acquisition scheme changes.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Fanglin Bao, Hyunsoo Choi, Vaneet Aggarwal, Zubin Jacob
Summary: Researchers propose a quantum-accelerated imaging method that significantly reduces observation time, with applications beyond astronomy to high-speed imaging and efficient optical read-out of qubits.
Article
Optics
Songsong Li, Ping Xu, Yadong Xu
Summary: In this work, we designed and studied an optical hyperbolic metasurface with a specific in-plane dispersion relationship transitioning from type I to type II. Although there is no longer a topological transition in the dispersion relationship, the PDOS can still be significantly enhanced around the transition point due to ENZ modes. The enhancement of PDOS is found to depend strongly on the top layer of material, with a balance between ENZ modes and surface plasmon polaritons.
Article
Multidisciplinary Sciences
Rina Takagi, Naofumi Matsuyama, Victor Ukleev, Le Yu, Jonathan S. White, Sonia Francoual, Jose R. L. Mardegan, Satoru Hayami, Hiraku Saito, Koji Kaneko, Kazuki Ohishi, Yoshichika Onuki, Taka-hisa Arima, Yoshinori Tokura, Taro Nakajima, Shinichiro Seki
Summary: This study reports the discovery of square and rhombic lattices of nanometric skyrmions in the centrosymmetric compound EuAl4, expanding the range of potential materials hosting skyrmions.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Hongyuan Li, Shaowei Li, Mit H. Naik, Jingxu Xie, Xinyu Li, Emma Regan, Danqing Wang, Wenyu Zhao, Kentaro Yumigeta, Mark Blei, Takashi Taniguchi, Kenji Watanabe, Sefaattin Tongay, Alex Zettl, Steven G. Louie, Michael F. Crommie, Feng Wang
Summary: Transition metal dichalcogenide moire heterostructures provide an ideal platform for studying the extended Hubbard model, where long-range Coulomb interactions are crucial. A scanning tunnelling microscopy technique is described for sensing and manipulating correlated electrons in gated WS2/WSe2 moire superlattice, allowing experimental extraction of fundamental extended Hubbard model parameters. This technique enables imaging and manipulation of the charge state of correlated electrons at local moire sites.
Article
Optics
Qiang Zhang, Zhenwei Xie, Peng Shi, Hui Yang, Hairong He, Luping Du, Xiaocong Yuan
Summary: This article investigates the dynamic modulation of optical skyrmions by changing the field symmetry and adding chirality. The study reveals that field symmetry controls the transformation between skyrmions and merons, while material chirality regulates the degree of twist in the fields and spins, and governs the skyrmionic transition. The enantioselective twist of skyrmions and merons arises from the chirality-induced splitting of the hyperboloid in momentum space. The research enriches the portfolio of optical quasiparticles and deepens our understanding of light-matter interaction, paving the way for applications such as chiral sensing, optical tweezing, and topological phase transitions in quantum matter.
PHOTONICS RESEARCH
(2022)
Article
Chemistry, Analytical
Shilei Fan, Aijia Zhang, Hu Sun, Fenglin Yun
Summary: The study introduces a damage imaging technique based on the TR-MUSIC algorithm, demonstrating its capability to effectively detect multiple damages in aircraft structures with superresolution ability.
Article
Chemistry, Physical
Yihang Zeng, Zhengchao Xia, Roei Dery, Kenji Watanabe, Takashi Taniguchi, Jie Shan, Kin Fai Mak
Summary: In a heterostructure composed of WS2/bilayer WSe2/WS2 multilayers, it was discovered that strongly correlated bosons can be trapped in a triangular lattice. Correlated insulating states were observed when the electron filling factor of the two lattices reached 1/3, 2/3, 4/3, and 5/3. These states can be explained as exciton density waves in a Bose-Fermi mixture of excitons and holes. The strong repulsive interactions between the constituents led to the formation of robust generalized Wigner crystals, which restricted the exciton fluid to channels that spontaneously broke the translational symmetry of the lattice. These results demonstrate that Coulomb-coupled lattices are a fertile ground for studying correlated many-boson phenomena.
Article
Quantum Science & Technology
Lukas J. Fiderer, Tommaso Tufarelli, Samanta Piano, Gerardo Adesso
Summary: The paper presents general expressions for the quantum Fisher information matrix that bypass matrix diagonalization and do not require the expansion of operators on an orthonormal set of states. The approach simplifies analytical calculations considerably, especially when dealing with density matrices expressed in terms of nonorthogonal states like coherent states. Demonstrating the power of this method in discrete quantum imaging, the paper derives novel results in estimating positions and intensities of incoherent point sources, expecting that this method will become standard in quantum metrology.
Article
Physics, Multidisciplinary
DinhDuy Vu, S. Das Sarma
Summary: Inspired by twisted 2D bilayer moire systems, we studied Coulomb interacting systems under two unequal period 1D lattice potentials, leading to a 1D bichromatic moire superlattice with flattened band and enhanced Mott gaps. Fine-tuning lattice commensuration plays a key role in the appearance of correlated insulating phase.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Alvaro Cuartero-Gonzalez, Alejandro Manjavacas, Antonio Fernandez-Dominguez
Summary: This study investigates how the local density of states in a plasmonic cavity changes due to the presence of a distorting quantum emitter using first-order scattering theory and electromagnetic Green's function tensors. Three mechanisms behind the asymmetric spectral features resulting from the emitter distortion were identified: modification of plasmonic coupling, emergence of quadratic contributions, and absorption by the distorting emitter. The theory was applied to study different systems and its generality was validated against numerical simulations.
NEW JOURNAL OF PHYSICS
(2021)
Article
Multidisciplinary Sciences
Alessandro Tuniz, Boris T. Kuhlmey
Summary: This article introduces a new imaging method that achieves non-invasive super-resolution imaging by selectively amplifying evanescent waves, allowing for sub-wavelength image resolution.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Guangxing Wu, Yan Zhou, Minghui Hong
Summary: The optical microsphere nanoscope has the potential to be used in inspecting integrated circuit chips and characterizing morphology in biology. However, its resolution in ambient air is limited by the magnification and numerical aperture of the microsphere. To overcome this, high refractive index hyper-hemi-microspheres with tunable magnification were proposed and realized. Experimental results show that these hyper-hemi-microspheres have better imaging resolution and contrast compared to microspheres in air.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Ruslan Rohrich, A. Femius Koenderink
Summary: This article introduces a new structured illumination microscopy technique that extends the capabilities of SIM by combining ideas from illumination engineering and nanophotonics. Experimental results demonstrate the potential for resolution enhancements beyond regular SIM, validated through simulations and experiments. However, there are still obstacles to overcome in the implementation of experiments for artifact-free super-resolution imaging.
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
Physics, Multidisciplinary
Ruslan Rohrich, A. Femius Koenderink, Stefan Witte, Lars Loetgering
Summary: This study presents an approach to coherence engineering that combines a quasi-monochromatic thermal source and a DMD, enabling control over spatially partially coherent light through a ptychographic scanning microscope. This method opens up new routes to low-cost coherence control, with potential applications in micromanipulation, nanophotonics, and quantitative phase contrast imaging.
NEW JOURNAL OF PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Robin D. Buijs, Tom A. W. Wolterink, Giampiero Gerini, Ewold Verhagen, A. Femius Koenderink
Summary: This paper investigates the control of optical fields at the nanoscale using metasurface patches, demonstrating the potential for sub-wavelength structural illumination microscopy and sensing. The study explores the limits of control in terms of illumination profiles and spatial resolution, showing promising results for nanoscale optical sensing.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Physics, Applied
Tom A. W. Wolterink, Robin D. Buijs, Giampiero Gerini, Ewold Verhagen, A. Femius Koenderink
Summary: The study produced very small overlay targets for accurately determining overlay errors and relative displacement between two separate device layers, which can be used for subsequent overlay measurements. Using greater quantities of smaller overlay targets could improve performance directly and provide finer sampling of deformation.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Isabelle M. Palstra, Ilse Maillette de Buy Wenniger, Biplab K. Patra, Erik C. Garnett, A. Femius Koenderink
Summary: In this study, unbiased Bayesian inference analysis methods were used to analyze intermittency in intensity and fluorescence lifetime of CsPbBr3 perovskite quantum dots. It was found that the quantum dots display a variety of gray states where brightness correlates inversely with decay rate, confirming the multiple recombination centers model. The research also revealed a pattern in the switching behavior of the dots, with a tendency to return to the bright state before transitioning to a dim state and exploring the entire set of states available when choosing a dim state.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Isabelle M. Palstra, A. Femius Koenderink
Summary: The study presents a Python toolbox for unbiased statistical analysis of fluorescence intermittency properties of single emitters, emphasizing the importance of unbiased statistical analysis of intermittency switching time distributions to avoid interpretation artifacts. The implementation of Bayesian changepoint analysis and level clustering can be applied to real experimental data and as a tool to verify the ramifications of hypothesized mechanistic intermittency models.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Optics
Angela Barreda, Mario Zapata-Herrera, Isabelle M. Palstra, Laura Mercade, Javier Aizpurua, A. Femius Koenderink, Alejandro Martinez
Summary: Hybrid photonic-plasmonic cavities that combine NPoM plasmonic cavities with dielectric-nanobeam photonic crystal cavities demonstrate high Purcell factors and low mode volumes, potentially enhancing light-matter interaction in nanophotonic systems.
PHOTONICS RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Eitan Oksenberg, Ilan Shlesinger, Angelos Xomalis, Andrea Baldi, Jeremy J. Baumberg, A. Femius Koenderink, Erik C. Garnett
Summary: By monitoring the interfacial environment of a thousand single nanocavities with slightly varied resonance energies, an effective absorption spectrum of metal-bound molecules and a rich plasmon-driven chemistry landscape was constructed. The unavoidable energy losses associated with metals can carry valuable information on energy transfer to the adsorbed molecules. Using methylene blue as a model system, shifts in the absorption spectrum of molecules following surface adsorption were measured, revealing a rich plasmon-driven reactivity landscape with distinct reaction pathways occurring in separate resonance energy windows.
NATURE NANOTECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Sylvianne D. C. Roscam Abbing, Radoslaw Kolkowski, Zhuang-Yan Zhang, Filippo Campi, Lars Lotgering, A. Femius Koenderink, Peter M. Kraus
Summary: Direct control over the amplitude and phase patterns of extreme-ultraviolet pulses is achieved through nanoengineered solid samples, enabling sub-fundamental wavelength resolution imaging and metrology of nanostructures.
PHYSICAL REVIEW LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Nasim Tavakoli, Richard Spalding, Alexander Lambertz, Pepijn Koppejan, Georgios Gkantzounis, Chenglong Wan, Ruslan Roehrich, Evgenia Kontoleta, A. Femius Koenderink, Riccardo Sapienza, Marian Florescu, Esther Alarcon-Llado
Summary: This study presents a new surface texturing technique for improving the absorption and efficiency of thin crystalline silicon solar cells. By using hyperuniform nanostructuring, it achieves a high solar light absorption of 66.5% in the spectral range of 400 to 1050 nm. This technology has the potential to increase the cell efficiency to above 15%.
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)
Review
Nanoscience & Nanotechnology
A. Femius Koenderink, Roman Tsukanov, Joerg Enderlein, Ignacio Izeddin, Valentina Krachmalnicoff
Summary: This article summarizes the recent advances in the field of nanophotonics that have leveraged SMLM and shows how some concepts commonly used in nanophotonics can benefit the development of new microscopy techniques for biophysics. It introduces the basic concepts of SMLM and the observables that can be measured, linking them with their corresponding physical quantities of interest in biophysics and nanophotonics.
Article
Physics, Multidisciplinary
Radoslaw Kolkowski, Stefanos Kovaios, A. Femius Koenderink
Summary: Breaking parity-time symmetry in honeycomblike active plasmonic metasurfaces can lead to nonunitary circular dichroism at oblique incidence. This extraordinary chiroptical response is achieved through band folding that enables coupling of incident light to spin-polarized flat bands surrounded by exceptional rings. The reported spin polarization differs from previously reported chiral and pseudochiral phenomena and can be considered a non-Hermitian counterpart of spin polarization of K-point valleys.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Chia-Ching Huang, Yingying Tang, Marco van der Laan, Jorik van de Groep, A. Femius Koenderink, Katerina Dohnalova
Summary: The study directly assessed the size dependence of the optical band gap and found that the optical band gap is given by the amorphous shell. It proposes that structural disorder might be the reason behind the limited emission tunability from various Si-NPs. The results suggest a pressing need for development and broader use of direct correlative single-dot microscopy methods.
ACS APPLIED NANO MATERIALS
(2021)
