226 papers
This paper proposes a conceptual design for a compact, multi-turn recirculating linear accelerator-based free electron laser that delivers high-brightness, MHz-repetition-rate EUV to soft X-ray pulses within a footprint of less than 100 meters, significantly reducing costs and expanding accessibility for university-scale research while demonstrating that synchrotron radiation effects do not limit beam quality.
The paper introduces ReDON, a novel recurrent diffractive optical neural processor that overcomes the limitations of static passive masks by employing reconfigurable, self-modulated nonlinearity inspired by gated linear units, thereby significantly enhancing computational expressivity and task performance on image benchmarks with minimal power overhead.
This study presents the first vehicle-mounted mid-infrared dual-comb spectroscopy system capable of stable, continuous on-road trace gas detection at speeds up to 100 km/h, successfully demonstrating the localization of natural gas leaks and the reconstruction of two-dimensional methane concentration fields.
This paper presents a co-optimized inverse design approach for wavelength division multiplexers and distributed Bragg gratings that achieves ultra-low crosstalk (< -40 dB) with minimal insertion loss across C- and L-bands in foundry-compatible silicon and silicon nitride platforms, effectively overcoming traditional trade-offs between channel spacing, performance, and device footprint.
This paper develops a wideband Gaussian noise model for semiconductor optical amplifiers that yields a simple, closed-form expression for nonlinear noise-to-signal ratio, demonstrating that accounting for gain compression significantly enhances noise predictions and achieving high accuracy (error < 0.1 dB) when the product of bandwidth and gain recovery time exceeds 100.
This paper presents the first experimental demonstration of a scalable, programmable all-optical neural network operating in a time-synthetic dimension, which overcomes the quadratic scaling limitations of spatial architectures by utilizing time-reflection and refraction to eliminate backscattering while achieving superior performance through an in-situ training framework.
This paper proposes a Distributed Resonant Beam Positioning (DRBP) system that simultaneously estimates the locations of both base stations and mobile targets in GPS-denied environments, enabling dynamic coverage expansion while achieving high-precision positioning with a root mean square error of 0.1 meters.
This paper reviews the motivations, recent material and device developments, and sensing demonstrations of Germanium-based mid-infrared photonic integrated circuits while outlining the challenges remaining for their transition from laboratory research to industrial applications.
This paper proposes replacing the traditional Stokes vector with a tensor formalism to derive skyrmion fields and analyze polarization in structured light, demonstrating its utility in non-paraxial optics and electromagnetic theory through applications such as Poynting's vector.
This paper presents a comprehensive, physically interpretable dielectric model of human skin across sub-terahertz and terahertz frequencies by integrating multi-Debye relaxation theory with effective medium formulations to predict frequency-dependent permittivity for non-invasive diagnostic and imaging applications.
This paper reports on the development of a high-speed, high-resolution X-ray camera based on the INTPIX4NA SOIPIX detector and a SiTCP-XG 10GbE readout system, demonstrating its successful application in three recent experiments at KEK facilities: X-ray zooming microscopy, phase-contrast imaging, and nondestructive lithium detection in battery materials.
This paper experimentally demonstrates that high-power laser pulses propagating through air undergo periodic collapse arrest events driven by rotational nonlinearity, generating topologically constrained spatiotemporal optical vortices that organize into charge-separated arrays and create a temporal intensity comb for controlled long-range filamentation.
This study utilizes THz time-domain spectroscopy to characterize the frequency-dependent dielectric properties of pork skin tissue across the 0.1–11 THz range, providing critical data for modeling intra-body nanosensor networks.
This paper presents a theoretical framework and experimental realization of a new family of single-cycle toroidal helical electromagnetic pulses, generated via a coaxial horn emitter and equiangular spiral grating, which combine non-transverse toroidal topology with controllable helicity to enable advanced light-matter interactions and data transfer applications.
This paper presents a theoretical and experimental study demonstrating that dye-doped liquid crystal q-plates fabricated via photoalignment using a commercial Variable Spiral Plate can robustly generate tunable, high-quality optical vortices across the entire visible spectrum with extended achromaticity, despite the presence of diattenuation effects.
This paper proposes the RB-HWDOA system, which combines a telescope modulation structure and an optical spectrum-based algorithm to achieve high-resolution, wide-field-of-view multi-target direction of arrival estimation for resonant beam systems in IoT applications.
This paper demonstrates that trifolium-shaped nanocavity arrays milled into single-crystal Au(111) surfaces exhibit depth-tunable and azimuth-dependent optical reflection properties, offering a promising platform for applications in structural color, color filtering, and anti-counterfeiting.
This paper establishes that multilayer Kubelka-Munk theory is rigorously equivalent to a rank-2 Galerkin projection of the radiative transfer equation onto hemispherical basis functions, thereby providing a mathematical foundation that explains its accuracy in layered media while clarifying its inherent inability to recover angular information lost during projection.
This paper demonstrates triggered single-photon emission with customizable wavefronts from semiconductor quantum dots embedded in ultra-thin geometric-phase metacavities, successfully overcoming the traditional trade-off between Purcell enhancement and tailored wavefront control to establish a new paradigm for monolithic, high-performance quantum light sources.
This study establishes a strong correlation between the optical helicity density of near-field thermal emission and the twist angle in bilayer van der Waals materials, revealing that a photonic topological phase transition at a critical angle significantly enhances helicity through polariton canalization and confined group velocity.