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| Open AccessA figure of merit for efficiency roll-off in TADF-based organic LEDs
Efficiency roll-off in a wide range of TADF OLEDs is analysed and a figure of merit proposed for materials design to improve efficiency at high brightness, potentially expanding the range of applications of TADF materials.
- S. Diesing
- , L. Zhang
- & I. D. W. Samuel
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Coherent nanophotonic electron accelerator
A scalable nanophotonic electron accelerator with a high particle acceleration gradient and good beam confinement achieves an energy gain of 43%.
- Tomáš Chlouba
- , Roy Shiloh
- & Peter Hommelhoff
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Article
| Open AccessHigh-brightness scalable continuous-wave single-mode photonic-crystal laser
We developed large-scale photonic-crystal surface-emitting lasers with controlled Hermitian and non-Hermitian couplings inside the photonic crystal and a pre-installed spatial distribution of the lattice constant, which leads to the realization of a continuous-wave brightness of 1 GW cm−2 sr−1.
- Masahiro Yoshida
- , Shumpei Katsuno
- & Susumu Noda
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Regulating surface potential maximizes voltage in all-perovskite tandems
Because open-circuit voltage deficit is greater in wide-bandgap perovskite solar cells, the authors introduce diammonium molecules to modify perovskite surface states and achieve a more uniform spatial distribution of surface potential, enabling record voltage all-perovskite tandem solar cells.
- Hao Chen
- , Aidan Maxwell
- & Edward H. Sargent
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Article |
Topological Chern vectors in three-dimensional photonic crystals
Magnetically tunable three-dimensional photonic crystals are used to achieve the experimental demonstration of Chern vectors and their topological surface states, showing the Chern vector to be an intrinsic bulk topological invariant in three-dimensional topological materials.
- Gui-Geng Liu
- , Zhen Gao
- & Baile Zhang
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Article |
Optical observation of single spins in silicon
Individually addressable ‘T centre’ photon-spin qubits are integrated in silicon photonic structures and their spin-dependent telecommunications-band optical transitions characterized, creating opportunities to construct silicon-integrated, telecommunications-band quantum information networks.
- Daniel B. Higginbottom
- , Alexander T. K. Kurkjian
- & Stephanie Simmons
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Article |
Measuring the knot of non-Hermitian degeneracies and non-commuting braids
Control loops generically produce braids of eigenfrequencies, and these braids form a non-Abelian group that reflects the non-trivial geometry of the space of degeneracies; these features are demonstrated experimentally using a cavity optomechanical system.
- Yogesh S. S. Patil
- , Judith Höller
- & Jack G. E. Harris
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Article |
Electrically tunable quantum confinement of neutral excitons
Electrically controlled quantum confinement of excitons to below 10 nm is achieved in a 2D semiconductor by combining in-plane electric fields with interactions between excitons and free charges.
- Deepankur Thureja
- , Atac Imamoglu
- & Puneet A. Murthy
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Article |
Polariton Bose–Einstein condensate from a bound state in the continuum
Using a patterned waveguide, a Bose–Einstein condensate of polaritons is realized in a bound state in the continuum, with a low condensation threshold density that occurs at a dispersion saddle point.
- V. Ardizzone
- , F. Riminucci
- & D. Sanvitto
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Observation of chiral state transfer without encircling an exceptional point
A study realizes a photonic emulator to probe the temporal evolution of light in a non-Hermitian system, and reports the observation of chiral state transfer without encircling an exceptional point.
- Hadiseh Nasari
- , Gisela Lopez-Galmiche
- & Mercedeh Khajavikhan
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Article |
High-brightness all-polymer stretchable LED with charge-trapping dilution
A material design strategy and fabrication process is described to produce all-polymer light-emitting diodes with high brightness, current efficiency and good mechanical stability, with applications in skin electronics and human–machine interfaces.
- Zhitao Zhang
- , Weichen Wang
- & Zhenan Bao
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Article |
Approaching the intrinsic exciton physics limit in two-dimensional semiconductor diodes
Two-dimensional transition metal dichalcogenide diodes with defect-free van der Waals contacts allows minimization of the extrinsic interfacial disorder-dominated recombination and access to the intrinsic excitonic behaviour in two-dimensional semiconductor devices.
- Peng Chen
- , Timothy L. Atallah
- & Xiangfeng Duan
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Article |
Single-photon nonlinearity at room temperature
Nonlinearity induced by a single photon is desirable because it can drive power consumption of optical devices to their fundamental quantum limit, and is demonstrated here at room temperature.
- Anton V. Zasedatelev
- , Anton V. Baranikov
- & Pavlos G. Lagoudakis
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Article |
Electron phase-space control in photonic chip-based particle acceleration
In a tiny chip-based particle accelerator, phase-space control of the emerging electron beam demonstrates guiding over a length of nearly 80 micrometres and an indispensable prerequisite to electron acceleration to high energies.
- R. Shiloh
- , J. Illmer
- & P. Hommelhoff
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Article |
Control and readout of a superconducting qubit using a photonic link
High-fidelity control and readout of a superconducting qubit is performed with a low-noise optical fibre link that delivers microwave signals directly to the millikelvin quantum computing environment.
- F. Lecocq
- , F. Quinlan
- & J. D. Teufel
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Article |
Large-area display textiles integrated with functional systems
A large electronic display textile that is flexible, breathable and withstands repeated machine-washing is integrated with a keyboard and power supply to create a wearable, durable communication tool.
- Xiang Shi
- , Yong Zuo
- & Huisheng Peng
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Article |
Quantum circuits with many photons on a programmable nanophotonic chip
A system for realizing many-photon quantum circuits is presented, comprising a programmable nanophotonic chip operating at room temperature, interfaced with a fully automated control system.
- J. M. Arrazola
- , V. Bergholm
- & Y. Zhang
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Article |
Experimental demonstration of the mechanism of steady-state microbunching
The mechanism of steady-state electron microbunching is demonstrated, providing a basis that will enable its full implementation in electron storage rings to generate high-repetition, high-power coherent radiation.
- Xiujie Deng
- , Alexander Chao
- & Lixin Yan
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Article |
Plasmonic enhancement of stability and brightness in organic light-emitting devices
Plasmonic effects in organic light-emitting devices, which are normally considered a source of energy loss, are harnessed to enhance the stability of these devices while maintaining operational efficiency.
- Michael A. Fusella
- , Renata Saramak
- & Julia J. Brown
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Article |
Observation of the exceptional-point-enhanced Sagnac effect
precisely controllable integrated optical gyroscope based on stimulated Brillouin scattering is used to study non-Hermitian physics, revealing a four-fold enhancement of the Sagnac scale factor near exceptional points.
- Yu-Hung Lai
- , Yu-Kun Lu
- & Kerry Vahala
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Article |
Non-Hermitian ring laser gyroscopes with enhanced Sagnac sensitivity
A method based on non-Hermitian singularities, or exceptional points, is established and used to increase the Sagnac scale factor and enhance the sensitivity of ring-laser gyroscopes.
- Mohammad P. Hokmabadi
- , Alexander Schumer
- & Mercedeh Khajavikhan
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Letter |
Signatures of moiré-trapped valley excitons in MoSe2/WSe2 heterobilayers
The trapping of interlayer valley excitons in a moiré potential formed by a molybdenum diselenide/tungsten diselenide heterobilayer with twist angle control is reported.
- Kyle L. Seyler
- , Pasqual Rivera
- & Xiaodong Xu
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Letter |
Time-asymmetric loop around an exceptional point over the full optical communications band
Time-asymmetric light transmission over the entire optical communications band is achieved using a silicon photonic structure with photonic modes that dynamically encircle an exceptional point in the optical domain.
- Jae Woong Yoon
- , Youngsun Choi
- & Pierre Berini
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Letter |
Photonic topological Anderson insulators
A counter-intuitive state—known as a topological Anderson insulator—in which strong disorder leads to the formation of topologically protected rather than trivial states is realized in a photonic system.
- Simon Stützer
- , Yonatan Plotnik
- & Alexander Szameit
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Letter |
Room-temperature nine-µm-wavelength photodetectors and GHz-frequency heterodyne receivers
Quantum-well photodetectors fabricated from photonic metamaterials show enhanced room-temperature sensitivity to long-wavelength infrared radiation and produce gigahertz-frequency heterodyne signals when pumped with quantum cascade lasers.
- Daniele Palaferri
- , Yanko Todorov
- & Carlo Sirtori
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Letter |
A photophoretic-trap volumetric display
Photophoretic optical trapping of cellulose particles and persistence of vision are used to produce real-space volumetric images that can be viewed from all angles, in geometries unachievable by holograms and light-field technologies.
- D. E. Smalley
- , E. Nygaard
- & J. Peatross
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Letter |
Solution-processed, high-performance light-emitting diodes based on quantum dots
The insertion of an insulating layer into a multilayer light-emitting diode (LED) based on quantum dots and produced by depositing the layers from solution increases the performance of the LEDs to levels comparable to those of state-of-the-art organic LEDs produced by vacuum deposition, while retaining the advantages of solution processing.
- Xingliang Dai
- , Zhenxing Zhang
- & Xiaogang Peng
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Letter |
Demonstration of electron acceleration in a laser-driven dielectric microstructure
Acceleration of relativistic electrons in a dielectric laser accelerator at high electric field gradients is reported, setting the stage for the development of future multi-staged accelerators of this type.
- E. A. Peralta
- , K. Soong
- & R. L. Byer
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Letter |
A quantum access network
An experimental demonstration of the concept of a ‘quantum access network’ based on simple and cost-effective telecommunication technologies yields a viable method for realizing multi-user quantum key distribution networks with efficient use of resources.
- Bernd Fröhlich
- , James F. Dynes
- & Andrew J. Shields
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Letter |
A micrometre-scale Raman silicon laser with a microwatt threshold
A continuous-wave Raman silicon laser with a photonic-crystal nanocavity less than ten micrometres in size and an unprecedentedly low lasing threshold of one microwatt is demonstrated, showing that the integration of all-silicon devices into photonic circuits may be possible.
- Yasushi Takahashi
- , Yoshitaka Inui
- & Susumu Noda