Issue Ebook
cover story
- Current Issue
- Archive
Volume 15 Issue 7，2026
News & Views
Abstract：Recent advances in high-dimensional multiplexing have enabled the concurrent operation of multiple independent communication channels through orbital angular momentum, polarization, and frequency division multiplexing, all implemented on a compact space-time-coding metasurface platform. These developments provide a streamlined and high-efficiency approach to optimizing multiplexing performance and enhancing channel capacity in wireless communication systems.1|1|0Updated：2026-07-29- Abstract：Experiments in quantum dot lasers have demonstrated that optimized devices can withstand extreme levels of optical feedback without succumbing to coherence collapse. These results pave the way for a new generation of compact, isolator-free photonic integrated circuits.0|1|0Updated：2026-07-29
- Abstract：Experiments in a dispersion-engineered nanophotonic lithium niobate waveguide have demonstrated two-color soliton compression to few-cycle duration by exploiting cascaded second-order nonlinearity. These results open new opportunities to study quadratic soliton dynamics in integrated platforms and for applications in on-chip photonic signal processing.0|1|0Updated：2026-07-29
- Abstract：The first experimental demonstration of single-pump multicolor solitons using a triple-microring configuration has been reported recently. This original approach expands the potential of optical frequency comb technology for photonics and time-frequency metrology.0|1|0Updated：2026-07-29
- Abstract：Mapping the total angular momentum of light bound to nanophotonic structures enables the creation of single-photon states with rich topological textures. This approach opens new opportunities for generating high-dimensional entanglement and provides a promising route toward robust quantum information processing.0|1|0Updated：2026-07-29
Light People
Reviews
Abstract：Recent years have witnessed significant advancements in hollow-core fiber gas lasers (HCFGLs), driven by developments in hollow-core fiber (HCF) design and fabrication. These novel lasers are characterized by hollow-core structure, providing an ultralong and tiny interaction region for light and gases, thereby enabling light amplification with high efficiency, high beam quality, and tunability. HCFGLs has achieved broadband emission spanning from ultraviolet to mid-infrared (MIR) region, with a record output wavelength exceeding 4.8 μm in silica-based fiber lasers. Output power has surpassed 100 W in the near-infrared and reached an impressive 21.8 W in the MIR region. With the continuing reduction of attenuation in HCFs, particularly in the MIR regime, HCFGLs holds promises for potential applications in trace gas detection, space communication, polymer processing, medical treatment, national defense, etc. In this review, we focus on the basic principles and research progress of HCFGLs. The paradigm shifts history of HCFs are reviewed first. The development history and representative works of HCFGL based on the population inversion and stimulated Raman scattering are then introduced in detail. Finally, the future trends toward power enhancement, spectral expansion, and practical applications are also outlined. We hope this review will provide valuable insights for HCFGL researchers and interested readers, while also offering potential pathways to achieve otherwise challenging laser wavelength outputs and further power scaling.1|1|0Updated：2026-07-29- Abstract：Inorganic ultraviolet (UV) luminescent materials doped with metal ions (including rare-earth and heavy main-group metal ions) exhibit distinctive electronic transitions, excellent photostability, and tunable emission characteristics, making them highly promising for applications in optoelectronics, environmental remediation, and biomedicine. Recent progress in metal-ion-doped UV-emitting systems, such as persistent luminescence, upconversion luminescence, and mechanoluminescence, has significantly expanded the possibilities for UV light generation and utilization. This review provides a comprehensive and systematic overview of the luminescence mechanisms, recent advances, and emerging applications of these materials, structured according to dominant luminescence modes and supplemented by spectral classifications. First, UV persistent luminescence materials are critically examined with emphasis on optimization strategies and future research opportunities. Next, the UV upconversion luminescence systems are reviewed, highlighting mechanistic insights and breakthrough achievements. The discussion then turns to UV mechanoluminescent materials, focusing on their ability to emit light under mechanical stimulation and on recent progress in material design and device integration. Applications of these metal-ion-doped inorganic UV phosphors across different spectral regions are further analyzed under the guiding principle that “performance dictates application”. Finally, key challenges and future directions are outlined to provide a forward-looking perspective for advancing inorganic UV luminescent materials.0|1|0Updated：2026-07-29
Original Articles
Abstract：Raman optical time-domain reflectometry (ROTDR) inherently balances sensing range, spatial resolution, and temperature accuracy through the pulse duration dictated by the OTDR position principle. However, optimizing one metric conventionally degrades the others, forming a theoretical trade-off. This work introduces complex-domain square-wave width-chirp pulse compression to break that physical limitation. The steep edges and rich high-order harmonics of complex-domain square-wave width-chirp pulse undergo matched filtering, producing a compressed δ-pulse whose full width at half maximum, rather than the original pulse duration, now governs sensing spatial resolution. Complex-domain matched filtering, implemented via a conjugate time-reversal filter, achieves a 15.09 dB gain in signal-to-noise ratio, while the complex-domain envelope extraction method isolates and removes Raman phase noise. The proposed scheme simultaneously achieves 45 km sensing distance, 0.5 m spatial resolution, and 0.11 ℃ temperature accuracy, demonstrating complete decoupling of these metrics from the pulse duration. The proposed framework offers a new paradigm for long-range, high-precision distributed temperature sensing and is extensible to Brillouin and Rayleigh scattering systems.0|2|0Updated：2026-07-29- Abstract：Engineering optical chirality at the nanoscale has unlocked a wide range of light-matter interactions, with implications for the controlled manipulation of photonic degrees of freedom, ultrasensitive enantiomer detection, structured illumination microscopy, and quantum communication. Efficient characterization of chiral nanostructures is therefore of paramount importance, as it provides direct insights into their chiro-optical responses and guides the rational design of next-generation nanodevices. Conventional chiro-optical techniques, however, often fall short due to intrinsic limitations, such as their inability to probe spatially and angularly inhomogeneous chirality or to disentangle coexisting linear and circular anisotropies. Here, we present a Fourier-domain polarimetric framework to investigate the chiro-optical responses of plasmonic gammadion nanoarrays. By mapping scattered polarization states in momentum space through Stokes-Mueller polarimetry, we capture inhomogeneous radiation patterns that encode the underlying electromagnetic modes and diffraction features governing the observed chirality within the nanostructured system. The momentum-resolved Mueller matrix not only enables simultaneous quantification of circular birefringence and circular diattenuation but also facilitates their decoupling from linear anisotropies, thereby providing a comprehensive characterization of intrinsic chiro-optical behavior. We further show how structural thickness modulates the chiral response and demonstrate the sensitivity of this approach in detecting subtle chiro-optical signals. Finally, we combine gammadions arrays with momentum-domain chiral measurements as a sensitive platform for molecular enantiomer detection, opening new opportunities for advanced chiral sensing applications.1|1|0Updated：2026-07-29
SEE MORE
- Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09064830号-19
京公网安备11010802024621 - It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
- Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
0