Quantized charge pumping is a robust adiabatic phenomenon uniquely existing in topologically nontrivial systems. Such topological not only brings fundamental insights to the evolution of states under protection topology but also provides vital approach for study higher-dimensional phases. In this work, we demonstrate an acoustic waveguide system by showing successful boundary (TBSs) across bulk opposite edge. By exploring finite-size induced mini-gap between two TBS bands, unveil...

In linear, lossless, time-invariant, and nonbiased acoustic systems, mode transitions are time reversible, consistent with Lorentz reciprocity implying a strict symmetry in space-time for sound manipulation. Here, we overcome this fundamental limitation by implementing spatiotemporally modulated metamaterials that support nonreciprocal steering. Our mechanism relies on the coupling between an ultrathin membrane external biasing electromagnetic fields, realizing programmable dynamic control...

Abstract Advances in biomimicry have led to the rise of advanced robotics, posing promising revolutions across a variety fields. Programmable self‐sustained actuation nature, such as human's heart beating, bird's wingbeats, and penguin's waddling, are intriguing inspiring but challenging for device innovation, which hinders emergence autonomous self‐feedback applications, especially optics photonics. Herein, design, fabrication, operation crosslinked liquid crystal actuators described that...

Abstract Providing additional degrees of freedom to manipulate light, spatiotemporal optical vortex (STOV) beams carrying transverse orbital angular momentum are fundamental importance for control light-matter interactions. Unfortunately, existing methods generate STOV plagued by various limitations such as inefficiency, bulkiness, and complexity. Here, we theoretically propose experimentally demonstrate a microscale singlet platform composed slanted nanograting STOV. Leveraging the...

A wearable intelligent SERS platform enables the sensitive detection of UA (0.1 μM) in sweat for AI diagnosis gout.

Abstract For classical waves, phase matching is vital for enabling efficient energy transfer in many scenarios, such as waveguide coupling and nonlinear optical frequency conversion. Here, we propose a temporal quasi-phase method realize robust complete acoustical between arbitrarily detuned cavities. In set of three cavities, A , B C the time-varying established adjacent elements. Analogy to concept stimulated Raman adiabatic passage, amplitudes two couplings are modulated time-delayed...

Adiabatic state evolution enables energy relocation and geometric phases, which can be essential for logic operations, but have yet to reported acoustics in the time domain. Here authors realize transient operations with an electroacoustic coupled system. In this work dynamic couplings, implemented electric feedback circuits, are vital preserving mode degeneracy achieving matrix-valued phases. This acoustic platform, showcasing various (such as non-Abelian braiding Hadamard gate)...

Mathematically, topological invariants arise from the parallel transport of eigenstates on energy bands, which, in physics, correspond to adiabatic dynamical evolution transient states. It determines presence boundary states, while lacking direct measurements. Here, we develop time-varying programmable coupling circuits between acoustic cavities mimic Hamiltonians Brillouin zone, with which excitation and bulk states are realized a unit cell. By extracting Berry phases band, invariants,...

Hybrid graphene-metal gratings with tunable Fano resonance are proposed and theoretically investigated in THz band. The grating contains alternately aligned metal graphene stripes, which could be viewed as the superposition of two kinds same period. Due to different material properties, coupling between parts forms typical Fano-type transmitting spectra. related physical mechanism is studied by inspecting induced dipole moment local surface charge distributions at wavelengths. Both amplitude...

Abstract Creating photonic crystals that can integrate and switch between multiple structural color images will greatly advance their utility in dynamic information transformation, high‐capacity storage, advanced encryption, but has proven to be highly challenging. Here, it is reported by programmably integrating newly developed 1D quasi‐periodic folding structures into a 3D crystal, the generated superstructure exhibits distinctive optical effects combine independently manipulatable...

Bound states in the continuum (BICs) with exceptionally high quality factors ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$Q$</tex-math></inline-formula> factors) have become focal points photonic device research, finding applications nonlinear enhancement, laser generation, sensing, and beyond. In this study, we systematically investigate intricate relationship between in-plane symmetry groups of...

Spectral singularities (SSs) emerge at isolated real frequencies when the scattering coefficients of a system diverge, producing anomalies in non-Hermitian systems. Here, based on parity-time symmetry, we introduce SSs for evanescent waves, and explore their exotic features. We show that wave can realize highly reconfigurable unidirectional lasers absorbers, offer opportunity to observe extreme associated with fully passive platforms, decoupling responses from energy considerations. More...

We propose and investigate a type of hybrid plasmonic waveguide in metal V-groove. A high-permittivity nanowire was placed the channel covered with dielectric film lower permittivity. Deeper sub-wavelength confinement much longer propagation distance were achieved comparison conventional waveguides. The overall performance improved as compared structure based on flat surface. Finite element analysis showed that both mode field profile can be adjusted by changing radius thickness. Some...

Abstract High‐precision dynamic sound manipulation remains a fundamental challenge in acoustics, crucial for diverse applications. Phased arrays (PAs), widely applied real‐time control, are limited resolution and complexity. Recently‐emerged acoustic metamaterials (AMs) significantly simplify high‐precision wavefront engineering, yet remain passive with fixed functionalities or have complicated active control systems to enhance resolution. To break through the above limitations, here...

<title>Abstract</title> Topological phases are states of matter defined by global topological invariants that remain invariant under adiabatic parameter variations, provided no phase transition occurs. This endows them with intrinsic robustness against local perturbations. Experimentally, these often identified indirectly observing robust boundary states, protected the bulk-boundary correspondence. Here, we propose an experimental method for direct measurement via state evolution in...

We investigate wavefront engineering of photon pairs generated through spontaneous parametric down conversion in lithium niobate-based nonlinear photonic crystals (NPCs). Due to the complexity domain structures, it is more convenient describe interaction based on Huygens-Fresnel principle than conventional quasiphase matching regime. Analytical expressions are obtained transverse properties down-converted states. The convenience LiNbO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Abstract Optics, playing an ever‐important role in life, is developing toward miniaturization and integration. Particularly, the field programming of integrated optics will benefit its functionality durability, thus highly pursued. Here, through precisely controlling space‐variant orientations anisotropic liquid crystals (LCs), various graded‐index waveguides are demonstrated a homogeneous medium. Straight/bending ring resonators fabricated via LC photopatterning. They exhibit pronounced...

Time modulation provides an important degree of freedom for classical wave steering in topological manners. Rather than using the spatial dimension to mimic time, here we design and implement acoustic temporal lattice with time-varying couplings demonstrate a unique type strongly localized Floquet \ensuremath{\pi} modes that are gauge independent can be robustly excited at frequency nontrivial band gap. We observe phase transitions by changing frequency, consistent calculated quasienergy...

Photons with complicated spatial mode structures can be applied for different quantum information tasks. Here, we show the entanglement of photons complex singularity patterns called Hermite-Laguerre-Gaussian (HLG) modes. Measuring one photon entangled pairs by HLG basis to define its pattern, steer structure partner, while initial is undefined. We also calculate specific quantum-correlation function. It used extend key distribution protocols and tune experiments dealing high-order...

Abstract Thouless pumping is the adiabatic transportation of quantized charge, which regarded as dynamic version quantum Hall effect. Here we propose design an acoustic system to demonstrate topological characterized by transporting energy from one side opposite. The composed coupled waveguide arrays with modulated coupling along both cross-sections and propagating direction. We explore multiple phases introducing rich spatial frequency or enlarged range hopping modulation. Such distinct are...

Self-imaging phenomena for nonperiodic waves along a parabolic trajectory encompass both the Talbot effect and accelerating Airy beams. Beyond ability to guide bent trajectory, self-imaging component offers invaluable advantages lensless imaging comprising periodic repetition of planar field distributions. In order circumvent thermoviscous diffraction effects, we structure subwavelength resonators in an acoustically impenetrable surface supporting spoof acoustic (SSAWs) provide highly...

Strain manipulation of a hybrid graphene-integrated microfiber structure is investigated experimentally and theoretically. Because the ultralong light–graphene interaction length (tens millimeters), as much 30% polarization-independent modulation with moderate strain 5% achieved. This platform may provide new guidelines for designing flexible devices. As service to our authors readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed be...

We propose to integrate the electro-optic (EO) tuning function into on-chip domain engineered lithium niobate (LN) waveguide. Due versatility of LN, both spontaneously parametric down conversion (SPDC) and EO interaction could be realized simultaneously. Photon pairs are generated through SPDC formation entangled state is modulated by processes. An tunable polarization-entangled photon proposed. Orthogonally-polarized parallel-polarized entanglements instantly switchable applied field. The...