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News & Views |
Metasurfaces provide the extra bling
Structuring surfaces coated with nanoparticles in the subwavelength range allows almost complete control over the optical appearance of an object.
- Frank Scheffold
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Article |
Dielectric control of reverse intersystem crossing in thermally activated delayed fluorescence emitters
The role of the dielectric environment in thermally activated delayed fluorescence (TADF) is not yet fully understood. Here the authors reveal the relevance of environment–emitter interactions in gating the reverse intersystem crossing and its particular relevance in dipolar TADF emitters.
- Alexander J. Gillett
- , Anton Pershin
- & David Beljonne
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Letter |
Scalable optical manufacture of dynamic structural colour in stretchable materials
Desired for optical sensing or visual communications, structural colour-changing materials are hindered by the lack of scalable manufacturing. Here, by adapting Lippmann photography, large-area manufacturing of colour patterns in photosensitive elastomers is realized.
- Benjamin Harvey Miller
- , Helen Liu
- & Mathias Kolle
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News & Views |
Twistronics and the small-angle magic
Understanding, at the atomic level, the effect of the stacking and twisting of different layered two-dimensional materials is a major challenge for the future of twistronics. Optical excitations evidence twist-angle-dependent whirlpool-shaped distortions in such materials.
- Ado Jorio
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News & Views |
Large excitons in light-dress
Giant exciton–polaritons come to the scene from a thin Cu2O crystal sandwiched by a microcavity. Their anticipated strong interactions may facilitate the development of a promising Rydberg solid-state platform for quantum technologies.
- HeeBong Yang
- & Na Young Kim
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Article |
Halide perovskites enable polaritonic XY spin Hamiltonian at room temperature
The realization of large-scale exciton–polariton platforms operating at room temperature and exhibiting long-lived, strongly interacting excitons has been elusive. Here, the authors demonstrate a room-temperature perovskite-based polaritonic platform with a polariton lattice size of up to 10 × 10.
- Renjie Tao
- , Kai Peng
- & Wei Bao
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News & Views |
More nodes bring more Floquet modes
A temporal modulation protocol enriches topological Floquet physics by enabling the realization of bimorphic Floquet systems where Chern and anomalous Floquet phases coexist in a single platform of laser-written waveguides.
- Alexander B. Khanikaev
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Article |
The visual appearances of disordered optical metasurfaces
A multiscale modelling platform combining nanoscale resonant scattering, mesoscale multiple scattering and macroscale light transport effectively predicts the macroscopic visual effects created by optical metamaterials with disordered nanostructures.
- Kevin Vynck
- , Romain Pacanowski
- & Philippe Lalanne
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Article |
Single-junction organic solar cells with over 19% efficiency enabled by a refined double-fibril network morphology
The morphology of donor–acceptor blends in organic photovoltaics dictates the efficiency of the exciton dissociation and charge diffusion, and thus the final device performance. Here, the authors show that filament assembly helps to maximize the output, further enabling a power conversion efficiency greater than 19%.
- Lei Zhu
- , Ming Zhang
- & Feng Liu
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News & Views |
Busting through quantum dot barriers
Early time transient absorption microscopy in quantum dot solids reveals anomalous exciton transport with multiple different temporal regimes within hundreds of femtoseconds after photoexcitation.
- Naomi S. Ginsberg
- & William A. Tisdale
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Article |
Bimorphic Floquet topological insulators
Departing from common approaches to designing Floquet topological insulators, here the authors present a photonic realization of Floquet topological insulators revealing topological phases that simultaneously support Chern and anomalous topological states.
- Georgios G. Pyrialakos
- , Julius Beck
- & Demetrios N. Christodoulides
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Article |
Rydberg exciton–polaritons in a Cu2O microcavity
Cu2O is a promising platform to host Rydberg exciton–polaritons, where excitons strongly couple to cavity photons, however their realization has been elusive. Here, the authors report Rydberg exciton–polaritons with principal quantum numbers up to n = 6.
- Konstantinos Orfanakis
- , Sai Kiran Rajendran
- & Hamid Ohadi
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News & Views |
Volume imaging of anisotropic materials
Revealing the molecular orientations of anisotropic materials is desired in materials science and soft-matter physics. Now, an optical diffraction tomographic approach enables the direct reconstruction of dielectric tensors of anisotropic structures in three dimensions.
- Anne Sentenac
- , Guillaume Maire
- & Patrick C. Chaumet
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Article |
Tomographic measurement of dielectric tensors at optical frequency
Measuring three-dimensional dielectric tensors is desired for applications in material and soft matter physics. Here, the authors use a tomographic approach and inversely solve the vectorial wave equation to directly reconstruct dielectric tensors of anisotropic structures.
- Seungwoo Shin
- , Jonghee Eun
- & YongKeun Park
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News & Views |
Silicon carbide incorporates quantum gates
Controlled nanophotonic fabrication in silicon carbide enables the quantum manipulation of nuclear spins with optical and spin coherence comparable to the pristine material, setting the ground for scalable integrated quantum networks.
- S. Castelletto
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Article |
Interface polarization in heterovalent core–shell nanocrystals
Controlled synthesis of heterostructured III-V–II-VI nanocrystals shows that dipole moments formed at the core–shell interface can tune the optoelectronic properties of these nanomaterials and their performance in light-emitting devices.
- Byeong Guk Jeong
- , Jun Hyuk Chang
- & Wan Ki Bae
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Article |
Large-scale fabrication of structurally coloured cellulose nanocrystal films and effect pigments
The large-scale fabrication of cellulose nanocrystal photonic films in a roll-to-roll device is achieved by careful optimization of the cellulose nanocrystal formulation and its controlled deposition and drying on a substrate. Once dry, these photonic films can be peeled and milled into effect pigments, highlighting the potential of cellulose nanocrystals as a sustainable material for industrial photonic applications.
- Benjamin E. Droguet
- , Hsin-Ling Liang
- & Silvia Vignolini
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News & Views |
On-demand emission from Tamm plasmons
Tamm plasmon thermal emitters can provide efficient infrared emission, but are limited by design complexity. Now, the inverse design of Tamm modes facilitated by CdO films on aperiodic dielectric reflectors enables emission with an on-demand spectrum.
- Juerg Leuthold
- & Alexander Dorodnyy
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Article |
Deterministic inverse design of Tamm plasmon thermal emitters with multi-resonant control
Tamm plasmon thermal emitters can provide low-cost, efficient mid to long infrared emission, but have been limited by a challenging design. Here the authors apply an inverse design protocol to demonstrate tailorable multi-band emission on CdO films.
- Mingze He
- , J. Ryan Nolen
- & Joshua D. Caldwell
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Article |
Confining isolated chromophores for highly efficient blue phosphorescence
A strategy to confine phosphorescent organic chromophores within ionic crystals proves effective in suppressing non-radiative recombination channels and increasing the phosphorescence efficiency of blue-emitting heavy-atom-free emitters.
- Wenpeng Ye
- , Huili Ma
- & Wei Huang
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Perspective |
Perovskite semiconductors for room-temperature exciton-polaritonics
An outlook on the potential of lead-halide perovskites as a playground for exciton-polariton studies and for the development of polaritonic devices operating at room temperature is provided.
- Rui Su
- , Antonio Fieramosca
- & Qihua Xiong
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Review Article |
Topology and geometry under the nonlinear electromagnetic spotlight
This Review focuses on nonlinear electromagnetic responses that arise from quantum geometry and topology.
- Qiong Ma
- , Adolfo G. Grushin
- & Kenneth S. Burch
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Review Article |
Single organic molecules for photonic quantum technologies
This Review discusses the photophysical properties and nonlinear behaviour of single molecules, and their use as single-photon sources and in single-molecule sensing and quantum-sensing applications.
- C. Toninelli
- , I. Gerhardt
- & M. Orrit
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Article |
Mechano-tunable chiral metasurfaces via colloidal assembly
Stacked elastomeric arrays containing plasmonic nanoparticles show efficient chiral responses that can be fully controlled by mechanical compression and stack rotation. These simple layered materials may be useful modulators for photonic applications.
- Patrick T. Probst
- , Martin Mayer
- & Andreas Fery
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Letter |
Nonlinear valley phonon scattering under the strong coupling regime
Strong exciton–polariton coupling is leveraged as a means to open up phonon scattering channels that are otherwise weak.
- Xiaoze Liu
- , Jun Yi
- & Xiang Zhang
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News & Views |
Hot plasmons make graphene shine
Bright hot plasmon emission is observed in graphene due to the ultrafast relaxation of hot carriers that were excited by femtosecond laser pulses of visible light.
- Frank H. L. Koppens
- & Klaas-Jan Tielrooij
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Article |
Mid-infrared radiative emission from bright hot plasmons in graphene
The optical emission of graphene under pumping with femtosecond laser pulses contains a strong component linked to plasmon emission from the hot electrons in the system.
- Laura Kim
- , Seyoon Kim
- & Harry A. Atwater
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Article |
Phonon renormalization in reconstructed MoS2 moiré superlattices
Raman measurements of twisted bilayer MoS2 as a function of twist angles, with theoretical support, reveal phonon renormalization in this moiré superlattice.
- Jiamin Quan
- , Lukas Linhart
- & Xiaoqin Li
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Article |
Efficient and low-voltage vertical organic permeable base light-emitting transistors
Vertical organic light-emitting transistors are realized by using a porous base electrode in the centre of the device, which improves efficiency and reduces operating voltage by regulating charge transport and forming an optical microcavity.
- Zhongbin Wu
- , Yuan Liu
- & Karl Leo
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Article |
Higher-order topological semimetal in acoustic crystals
A second-order topological Weyl semimetal based on a 3D-printed acoustic crystal, exhibiting Weyl points, Fermi arc surface states, and hinge states, has been experimentally demonstrated.
- Qiang Wei
- , Xuewei Zhang
- & Suotang Jia
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Letter |
Ultrafast control of magnetic interactions via light-driven phonons
Non-thermal lattice control of exchange interactions allows for picosecond coherent switching between competing antiferromagnetic and weakly ferromagnetic order.
- D. Afanasiev
- , J. R. Hortensius
- & A. D. Caviglia
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Article |
Creation of moiré bands in a monolayer semiconductor by spatially periodic dielectric screening
The moiré pattern that is formed between well-aligned graphene and hexagonal boron nitride can modify the properties of WSe2 (placed close by without intentional angle alignment), leading to the formation of a mini Brillouin zone and the folding of the bands in WSe2.
- Yang Xu
- , Connor Horn
- & Kin Fai Mak
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News & Views |
Flatland, lineland and dotland
Correlated real-space imaging and optical measurements of twisted MoSe2/WSe2 bilayers reveal strain-induced modulations of the moiré potential landscape, tuning arrays of 0D traps into 1D stripes and leading to substantial changes in the optical response of the heterostructures.
- Long Zhang
- & Hui Deng
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Review Article |
Metal halide perovskites for light-emitting diodes
The development of perovskite emitters, their use in light-emitting devices, and the challenges in enhancing the efficiency and stability, as well as reducing the potential toxicity of this technology are discussed in this Review.
- Xiao-Ke Liu
- , Weidong Xu
- & Feng Gao
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Article |
Direct observation of highly confined phonon polaritons in suspended monolayer hexagonal boron nitride
Monochromatic electron energy-loss spectroscopy enables the observation of highly confined and ultraslow hyperbolic phonon polaritons in suspended monolayer hexagonal boron nitride, expanding the potential of van der Waals materials for nanophotonic applications.
- Ning Li
- , Xiangdong Guo
- & Peng Gao
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Review Article |
Applications and challenges of thermoplasmonics
Thermoplasmonics is based on the use of plasmonic nanoparticles as sources of heat remotely controlled by light. This Review discusses its current applications and challenges in a broad range of scientific fields, from nanomedicine to hot-electron chemistry and nanofluidics.
- Guillaume Baffou
- , Frank Cichos
- & Romain Quidant
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Article |
Ultrafast hot-hole injection modifies hot-electron dynamics in Au/p-GaN heterostructures
Photo-excited gold nanoparticles are shown to provide ultrafast and efficient hot-hole injection to the valence band of p-type GaN, substantially altering hot-electron dynamics in the nanoparticles and forming a basis to design hot-hole-based optoelectronics.
- Giulia Tagliabue
- , Joseph S. DuChene
- & Harry A. Atwater
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News & Views |
Optical switches and modulators in deep freeze
The integration of silicon-based waveguides with barium titanate thin films enables the realization of efficient electro-optic switches and modulators operating at cryogenic temperatures, offering promising opportunities for quantum technologies.
- Goran Z. Mashanovich
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Letter |
An integrated optical modulator operating at cryogenic temperatures
The integration of barium titanate thin films with silicon-based waveguides enables the operation of efficient electro-optic switches and modulators at temperatures as low as 4 K, with potential applications in quantum computing and cryogenic computing technologies.
- Felix Eltes
- , Gerardo E. Villarreal-Garcia
- & Stefan Abel
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Article |
Understanding the luminescent nature of organic radicals for efficient doublet emitters and pure-red light-emitting diodes
An investigation on the electronic transitions of organic radicals allows us to identify design rules to increase the oscillator strength of these emitters and obtain efficient radical-based light-emitting diodes operating in the visible range.
- Alim Abdurahman
- , Timothy J. H. Hele
- & Emrys W. Evans
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Article |
Highly efficient luminescence from space-confined charge-transfer emitters
The use of rigid linkers to control the relative position and interaction of donor and acceptor units in exciplex emitters leads to the realization of organic light-emitting devices with enhanced external quantum efficiency.
- Xun Tang
- , Lin-Song Cui
- & Liang-Sheng Liao
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Article |
Three-state nematicity in the triangular lattice antiferromagnet Fe1/3NbS2
A spatially resolved optical polarimetry technique is used to identify a three-state Potts-nematic order parameter in a triangular lattice antiferromagnetic material.
- Arielle Little
- , Changmin Lee
- & Joseph Orenstein
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Article |
Dipolar interactions between localized interlayer excitons in van der Waals heterostructures
Repulsive dipole–dipole interactions between localized interlayer excitons are shown to modify the optical response of van der Waals heterobilayers, forming the basis to obtain strong optical nonlinearity and excitonic many-body states in two-dimensional materials.
- Weijie Li
- , Xin Lu
- & Ajit Srivastava
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Letter |
Broad spectral tuning of ultra-low-loss polaritons in a van der Waals crystal by intercalation
The spectral range of long-lived and confined phonon polaritons in a polar van der Waals crystal is shown to be tunable by intercalation of Na atoms, expanding their potential for nanophotonic applications in the mid-infrared domain.
- Javier Taboada-Gutiérrez
- , Gonzalo Álvarez-Pérez
- & Pablo Alonso-González
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Article |
Nonlinear Luttinger liquid plasmons in semiconducting single-walled carbon nanotubes
Electric-field tunable plasmonic excitations in semiconducting carbon nanotubes are shown to behave consistently with the nonlinear Luttinger liquid theory, providing a platform to study non-conventional one-dimensional electron dynamics and realize integrated nanophotonic devices.
- Sheng Wang
- , Sihan Zhao
- & Feng Wang
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Article |
Fermionic time-reversal symmetry in a photonic topological insulator
Counter-propagating chiral edge states are demonstrated in a photonic structure able to effectively incorporate fermionic time-reversal symmetry, thus providing the photonic implementation of an electronic topological insulator.
- Lukas J. Maczewsky
- , Bastian Höckendorf
- & Alexander Szameit
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Article |
Realizing spin Hamiltonians in nanoscale active photonic lattices
Vectorial electromagnetic modes in coupled metallic nanolasers are used to emulate the behaviour of complex magnetic materials, providing an integrated nanophotonic platform to study spin exchange interactions and map large-scale optimization problems.
- Midya Parto
- , William Hayenga
- & Mercedeh Khajavikhan
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Article |
Cubic ice Ic without stacking defects obtained from ice XVII
Structurally pure cubic ice Ic is obtained from the controlled heating of D2O ice XVII.
- Leonardo del Rosso
- , Milva Celli
- & Lorenzo Ulivi
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Article |
Design of van der Waals interfaces for broad-spectrum optoelectronics
Type-II van der Waals interfaces formed by different two-dimensional materials enable robust interlayer optical transitions, regardless of common issues such as lattice constant mismatch, layer misalignment or whether the constituent compounds are direct or indirect band semiconductors.
- Nicolas Ubrig
- , Evgeniy Ponomarev
- & Alberto F. Morpurgo