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| Open AccessAn all-optical multidirectional mechano-sensor inspired by biologically mechano-sensitive hair sensilla
Hair-like sensilla are evolved widely in organisms that perceive mechanical signals. Here, the authors report an all-optical mechano-sensor that can detect the real-time, directional displacement and force at several nm and μN levels.
- Yuxiang Li
- , Zhihe Guo
- & Xiang Wu
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Article
| Open AccessEfficient excitation and control of integrated photonic circuits with virtual critical coupling
The authors achieve enhanced cavity loading using complex-frequency excitations that can tailor on-demand the effective coupling rate in a microring resonator by precisely controlling the temporal evolution of the incident pulses.
- Jakob Hinney
- , Seunghwi Kim
- & Michal Lipson
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Article
| Open AccessBroadband angular spectrum differentiation using dielectric metasurfaces
Metasurfaces processing incoming images have been proposed in the context of real space operations. Here, the authors demonstrate mathematical operations, such as differentiation, on the angular spectrum of an image using metasurfaces, which can be used to enhance spectral features of an image.
- Ming Deng
- , Michele Cotrufo
- & Lin Chen
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Article
| Open AccessModulation-free laser stabilization technique using integrated cavity-coupled Mach-Zehnder interferometer
Stable lasers are crucial in many applications like sensing. Here, the authors demonstrate a laser frequency locking method that maintains performance, eliminates modulation, simplifies architecture, and enables miniaturization on a photonic chip.
- Mohamad Hossein Idjadi
- , Kwangwoong Kim
- & Nicolas K. Fontaine
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Article
| Open AccessIntegrated microcavity electric field sensors using Pound-Drever-Hall detection
Here the authors develop a chip-scale thin-film lithium niobate microcavity electric field sensor enabling real-time amplitude and phase measurements of various electric field waveforms.
- Xinyu Ma
- , Zhaoyu Cai
- & Rong Zeng
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Article
| Open AccessSwitchable unidirectional emissions from hydrogel gratings with integrated carbon quantum dots
Directional emission of photoluminescence is an emerging technique for light-emitting fields and nanophotonics. Here, the authors demonstrate a hydrogel grating with integrated quantum dots for switchable unidirectional emission tuning.
- Chenjie Dai
- , Shuai Wan
- & Zhongyang Li
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Article
| Open AccessElectrical tuning of branched flow of light
Here the authors experimentally realize the electrical tuning of branched flow of light in nematic liquid crystals. The statistical properties and the polarization effect of the branched flow of light in the film are systematically studied adding fundamental insights on branched flow of light.
- Shan-shan Chang
- , Ke-Hui Wu
- & Jin-hui Chen
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Article
| Open AccessDirect laser-written optomechanical membranes in fiber Fabry-Perot cavities
Authors showcase 3D direct laser writing to fabricate optically interfaced mechanical resonators. The membrane-type structures are placed inside fiber Fabry-Perot cavities to realize a miniaturized optical cavity. Further, the optomechanical properties reveal the coupling mechanism and a significant tuning of the mechanical resonator frequency.
- Lukas Tenbrake
- , Alexander Faßbender
- & Hannes Pfeifer
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| Open AccessSharp zero-phonon lines of single organic molecules on a hexagonal boron-nitride surface
Low-temperature spectroscopy of single fluorescent molecules can be of use to study dynamics in the nano-environment around them. Here, Smit et al. show that the fluorescence wavelength of molecules on the surface of hexagonal boron-nitride is particularly sensitive to how clean this surface is.
- Robert Smit
- , Arash Tebyani
- & Michel Orrit
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Article
| Open AccessHighly efficient octave-spanning long-wavelength infrared generation with a 74% quantum efficiency in a χ(2) waveguide
A χ(2) nonlinear micro-waveguide platform is demonstrated based on the birefringence phase matching for simple and efficient long-wavelength infrared generation, which could trigger new frontiers of MIR integrated nonlinear photonics.
- Bo Hu
- , Xuemei Yang
- & Houkun Liang
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Article
| Open AccessDual-comb optomechanical spectroscopy
Spectroscopic gas sensing with high sensitivity and selectivity finds an increasing number of applications. Here, the authors report an approach to ultrasensitive multiplexed gas sensing by integrating dual-comb spectroscopy with cavity optomechanics.
- Xinyi Ren
- , Jin Pan
- & Heping Zeng
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Article
| Open AccessHigh density lithium niobate photonic integrated circuits
Lithium niobate (LN) is difficult to process via dry etching. Here, authors demonstrate the fabrication of deeply etched, tightly confining, low loss LN photonic integrated circuits with losses 4 dB/m using diamond like carbon as a hard mask.
- Zihan Li
- , Rui Ning Wang
- & Tobias J. Kippenberg
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Article
| Open AccessAlvarez varifocal X-ray lens
Development of synchroton facilities increases the demand of optics for focusing X-ray beam to achieve diffraction-limited focusing onto samples. Here, the authors demonstrated an X-ray optical element based on visible light Alvarez varifocal lens providing precise performance focusing elements.
- Vishal Dhamgaye
- , David Laundy
- & Kawal Sawhney
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Article
| Open AccessAbsorption-induced transmission in plasma microphotonics
Plasma can act as a tunable medium in electro-optical device. Here the authors demonstrate electrically induced transmission due to change in absorption in a microphotonic device consisting of a plasma-filled microcavity.
- Baheej Bathish
- , Raanan Gad
- & Tal Carmon
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Article
| Open AccessCavity-enhanced single-shot readout of a quantum dot spin within 3 nanoseconds
Single-shot readout of optically active spin qubits is typically limited by low photon collection rates and measurement back-action. Here the authors overcome these limitations by using an open cavity approach for single-shot readout of a semiconductor quantum dot and demonstrate record readout time of a few ns.
- Nadia O. Antoniadis
- , Mark R. Hogg
- & Richard J. Warburton
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Article
| Open AccessThree-dimensional printing of silica glass with sub-micrometer resolution
Silica glass is a high-performance material used in most branches of society from glassware and windows to optical lenses and fibers. Here, we develop a sintering-free method for 3D printing silica glass with sub-micrometer resolution and successfully demonstrate an optical microtoroid resonator.
- Po-Han Huang
- , Miku Laakso
- & Frank Niklaus
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Article
| Open AccessUnique Huygens-Fresnel electromagnetic transportation of chiral Dirac wavelet in topological photonic crystal
Huygens-Fresnel features are useful for harnessing light in unique ways. Here the authors demonstrate a chiral light source that induces globally a counter energy flow in a topological photonics structure with Dirac-type frequency dispersion.
- Xing-Xiang Wang
- , Zhiwei Guo
- & Xiao Hu
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Article
| Open AccessEvanescent field trapping and propulsion of Janus particles along optical nanofibers
Manipulation of Janus particles is challenging and has limited precision. Here, the authors propose manipulation of Janus particles by optical forces in the evanescent field of an optical nanofiber, and demonstrate that they exhibit strong transverse localization on the nanofiber and much faster propulsion compared to all-dielectric particles of the same size.
- Georgiy Tkachenko
- , Viet Giang Truong
- & Síle Nic Chormaic
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Article
| Open AccessHollow-core fibers with reduced surface roughness and ultralow loss in the short-wavelength range
In all fiber optics, loss in the visible and UV is restricted by scattering. By improving the core roughness of hollow-core fibers, record attenuation values at short-wavelengths were achieved, opening exciting prospects in visible and UV-photonics.
- Jonas H. Osório
- , Foued Amrani
- & Fetah Benabid
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Article
| Open AccessSingle-shot 3D imaging with point cloud projection based on metadevice
The authors present a single-shot 3D imaging approach utilizing carefully designed point clouds projection based on a metasurface device. They show submillimeter depth accuracy and demonstrate the potential for hand gesture detection.
- Xiaoli Jing
- , Ruizhe Zhao
- & Lingling Huang
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| Open AccessMiniature optoelectronic compound eye camera
The defocusing problem has been considered the main bottleneck for developing optoelectronic μ-compound eye (CE) cameras. Here, the authors report miniature optoelectronic CE cameras with an ommatidia logarithmic-profile. The camera enables large field-of-view imaging, spatial position identification, and sensitive trajectory monitoring of moving targets.
- Zhi-Yong Hu
- , Yong-Lai Zhang
- & Hong-Bo Sun
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| Open AccessTailoring electron beams with high-frequency self-assembled magnetic charged particle micro optics
Electron beam manipulation is important for their application in microscopes, lithography instruments, and colliders. Here the authors report a wafer scale, self-assembled, microcoil electrically-driven magnetic charge particle optic device that can be implemented into different configurations for controlling of electron beams.
- R. Huber
- , F. Kern
- & A. Lubk
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Article
| Open AccessOptical linewidth of soliton microcombs
Understanding noise dynamics in frequency combs is crucial for applications. Here, the authors study the phase noise dynamics and the linewidth of soliton microcombs, revealing that some comb lines can be more quiet than the pump laser itself.
- Fuchuan Lei
- , Zhichao Ye
- & Victor Torres-Company
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Article
| Open AccessDiamond mirrors for high-power continuous-wave lasers
Mirrors that demonstrate 98% reflectivity and withstand 10 kilowatts of focused continuous-wave laser light are created by nanoscale fabrication of single-crystal diamond. The work finds applications in medicine, defence, industry, and communications.
- Haig A. Atikian
- , Neil Sinclair
- & Marko Lončar
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Article
| Open AccessIntegrated silicon carbide electro-optic modulator
Electro-optic modulator is used to encode electrical signals onto light. Here the authors demonstrate an electro-optic modulator, based on Silicon Carbide, which can be useful for quantum and optical communications.
- Keith Powell
- , Liwei Li
- & Xiaoke Yi
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Article
| Open AccessChiral and degenerate perfect absorption on exceptional surfaces
Robust engineering of non-Hermitian light-matter coupling will be crucial for future optical device design. Here the authors present a photonic system that operates on an exceptional surface, demonstrating chiral and degenerate absorption with super-Lorentzian lineshape.
- S. Soleymani
- , Q. Zhong
- & Ş. K. Özdemir
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Article
| Open AccessBiomimetic apposition compound eye fabricated using microfluidic-assisted 3D printing
Insect-like biomimetic compound eyes have many technological applications. Here, the authors present a facile fabrication scheme involving microfluidics assisted 3D printing that permits to completely separate design, optimization and construction of optical and sensor components.
- Bo Dai
- , Liang Zhang
- & Dawei Zhang
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Article
| Open AccessDynamical symmetry indicators for Floquet crystals
A general theory for Floquet topology applicable to all crystalline symmetry groups is lacking. Here, the authors propose such a theory for noninteracting Floquet crystals and predict an inversion-protected Floquet higher-order topological phase with anomalous chiral hinge modes.
- Jiabin Yu
- , Rui-Xing Zhang
- & Zhi-Da Song
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Article
| Open AccessA squeezed quantum microcomb on a chip
Microcombs operating in the deterministic quantum regime could lead to new applications. Here, the authors demonstrate a quantum microcomb consisting of 20 two-mode squeezed comb pairs, in an optical microresonator on a silicon chip.
- Zijiao Yang
- , Mandana Jahanbozorgi
- & Xu Yi
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| Open AccessVisible light photonic integrated Brillouin laser
In this work the authors demonstrate on-chip integration of Brillouin lasing operating at visible wavelengths, with engineered design for stable output. This technical and scientific advance will help develop integrated light sources for quantum computing or atomic and molecular spectroscopy.
- Nitesh Chauhan
- , Andrei Isichenko
- & Daniel J. Blumenthal
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| Open AccessEngineering phase and polarization singularity sheets
Metasurfaces allow for vast possibilities of light control. Here, the authors demonstrate on-demand engineering and realization of a broad family of two-dimensional phase singularity sheets and transverse polarization singularity sheets, opening up new aspects of light-matter interaction.
- Soon Wei Daniel Lim
- , Joon-Suh Park
- & Federico Capasso
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| Open AccessHigh-resolution light field prints by nanoscale 3D printing
Light field prints displaying 3D information often appear pixelated due to limited resolution and misalignment between lenses and colour pixels. Here, the authors present a one-step process via two-photon polymerization lithography to fabricate light field prints with high spatial and angular resolution.
- John You En Chan
- , Qifeng Ruan
- & Joel K. W. Yang
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Article
| Open AccessArbitrary linear transformations for photons in the frequency synthetic dimension
Photonic processors that can perform arbitrary tasks are in demand for many applications. Here, the authors present a photonic architecture using waveguide and resonator couplings to perform arbitrary linear transformations, by taking advantage of the frequency synthetic dimension.
- Siddharth Buddhiraju
- , Avik Dutt
- & Shanhui Fan
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Article
| Open AccessDispersive-wave induced noise limits in miniature soliton microwave sources
Here the authors explore the noise spectrum of soliton microcomb when the pump is decoupled from the solitons motion by balancing the Raman shift with the emitted dispersive wave. Based on the analysis of the phase noise and the soliton repetition rate, they identify the uncorrelated thermal fluctuations as underlying mechanism.
- Qi-Fan Yang
- , Qing-Xin Ji
- & Kerry Vahala
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| Open AccessObservation of anti-parity-time-symmetry, phase transitions and exceptional points in an optical fibre
Exceptional points enable exotic optical responses, but they usually require complex devices. Here, the authors realise an anti-PT symmetric response supporting exceptional points through Brillouin interactions in a standard optical fibre, which can be tuned by simply controlling pump power and frequency.
- Arik Bergman
- , Robert Duggan
- & Andrea Alù
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| Open AccessDynamics of soliton self-injection locking in optical microresonators
Self-injection locking of the pump laser for a soliton microcomb has significantly relaxed the requirements for laser drives. Here the authors study self-injection locking in experiment and theory and reveal that the soliton formation is feasible with detunings unreachable according to previous theories.
- Andrey S. Voloshin
- , Nikita M. Kondratiev
- & Igor A. Bilenko
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Article
| Open AccessNanoelectromechanical modulation of a strongly-coupled plasmonic dimer
Squeezing light into a nanometer gap offers strong light–matter interaction. Here, the authors develop a nanoelectromechanical system to dynamically control the gap of a plasmonic dimer at nanometer scale, enabling the realization of a light-intensity modulator that operates at high speed and with a low power consumption.
- Jung-Hwan Song
- , Søren Raza
- & Mark L. Brongersma
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Article
| Open AccessNon-resonant power-efficient directional Nd:YAG ceramic laser using a scattering cavity
Non-resonant lasers have many advantages since the allow for a diverse set of architectures and gain media, but their application is limited due to their low directionality and efficiency. Here, the authors present a scattering cavity laser with a single hole to achieve efficient and directional emission.
- KyeoReh Lee
- , Ho Jin Ma
- & YongKeun Park
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| Open AccessVernier frequency division with dual-microresonator solitons
For advanced microcomb applications, the exact detection of the high repetition rate becomes difficult due to the limited bandwidth of the photodiodes. Here, the authors present a Vernier dual-comb method to sample the main soliton comb and divide the repetition rate by a generating low frequency beat notes.
- Beichen Wang
- , Zijiao Yang
- & Xu Yi
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Article
| Open AccessA hybrid achromatic metalens
Metalenses that correct chromatic aberration also suffer from reduced focusing efficiency. Here, the authors introduce a Hybrid Achromatic Metalens which merges a metalens and phase plate to offer improved focusing efficiency over a broad wavelength range and diffraction limited imaging performance.
- F. Balli
- , M. Sultan
- & J. T. Hastings
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Article
| Open AccessHeteronuclear soliton molecules in optical microresonators
Molecules of solitons provide insight into fundamental interactions between them and the underlying nonlinear system. The reported heteronuclear molecules, comprised of dissipative solitons with distinct frequencies, temporal widths, and energies enter the multistability regime and yield in interlocked frequency combs.
- Wenle Weng
- , Romain Bouchand
- & Tobias J. Kippenberg
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Article
| Open AccessTwo-colour interferometry and switching through optomechanical dark mode excitation
Efficient switching and routing of photons of different wavelengths is desirable for future quantum information applications. To this end the authors demonstrate interference in a multimode system between two optomechanically induced transparency processes in a diamond on-chip cavity.
- David P. Lake
- , Matthew Mitchell
- & Paul E. Barclay
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Article
| Open AccessSymmetry-controlled edge states in the type-II phase of Dirac photonic lattices
The electrons in 2D materials like graphene are described by the relativistic Dirac equation. Here the authors present a lattice of evanescently coupled waveguides that emulates a wide range of Dirac excitations and study the type-II edge states that emerge in this photonic system.
- Georgios G. Pyrialakos
- , Nora Schmitt
- & Demetrios N. Christodoulides
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Article
| Open AccessA square-root topological insulator with non-quantized indices realized with photonic Aharonov-Bohm cages
Topological insulators are characterized by quantized topological invariants. Here, the authors report an insulator state showing spectral bands without quantized indices, yet robust boundary states in a photonic setup.
- Mark Kremer
- , Ioannis Petrides
- & Alexander Szameit
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Article
| Open AccessDiffractive small angle X-ray scattering imaging for anisotropic structures
Mesoscale investigations of material microarchitecture using small angle X-ray scattering (SAXS) methods have been limited by long measurement times. Here, the authors present an X-ray diffractive optics method which enables single shot acquisition of SAXS signals over large areas.
- Matias Kagias
- , Zhentian Wang
- & Marco Stampanoni
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Article
| Open AccessChip-scale atomic diffractive optical elements
Quantum coherence and the nonlinear properties of atoms are highly useful in optical devices. Here the authors show quantum-optic hybrid platforms in fully integrated chip-scale atomic diffractive optical elements by embedding hot atomic Rb vapor in microfabricated structures in silicon.
- Liron Stern
- , Douglas G. Bopp
- & John E. Kitching
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Article
| Open AccessFull-color laser displays based on organic printed microlaser arrays
In the next generation of display technology for portable devices, lasers could replace LEDs to achieve more vibrant colours. Here, Zhao et al. demonstrate a dynamic full-color display in which each pixel is made up of three printed organic microlasers to cover the RGB space.
- Jinyang Zhao
- , Yongli Yan
- & Yong Sheng Zhao
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Article
| Open AccessDemonstration of a two-dimensional \({\cal P}{\cal T}\)-symmetric crystal
To date, experimental demonstrations of PT-symmetric systems have been restricted to one dimension. Here, the authors experimentally realize and characterize a two-dimensional PT-symmetric system using photonic lattice waveguides with judiciously designed refractive index landscape and an alternating loss distribution.
- Mark Kremer
- , Tobias Biesenthal
- & Alexander Szameit
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Article
| Open AccessPrecision ultrasound sensing on a chip
With the wide adoption of ultrasound methods in biomedical and technological diagnostics, sensitive probes are in demand. Here, the authors employ cavity optomechanics where optical and mechanical resonances are coupled, both enhancing the sensitivity of the device and allowing its chip-integration.
- Sahar Basiri-Esfahani
- , Ardalan Armin
- & Warwick P. Bowen