A new theoretical study solves electromagnetic propagation in topological-insulator slab waveguides and finds that every supported mode becomes hybrid, with longitudinal field components, altered dispersion, and polarization rotation driven by the topological magnetoelectric response.
A new theoretical study shows that slab waveguides with a topological insulator core support exact hybrid electromagnetic modes, with longitudinal fields, altered dispersion, and polarization rotation driven by the topological magnetoelectric response.
A new theoretical study of slab waveguides with a topological-insulator core shows that every supported electromagnetic mode becomes hybridized, with longitudinal field components and polarization rotation emerging from the topological magnetoelectric response.
Exact guided modes in topological-insulator slabs point to new photonics control routes 阅读更多 »
Researchers report an unusual strong-coupling regime in an open microcavity where an ultrathin J-aggregate film acts as an excitonic mirror, reshaping cavity boundary conditions and linking optical modes of different order.
Organic Excitonic Mirrors Open a New Route to Cavity Coupling Control 阅读更多 »
A new study combines optical Bloch-equation modeling with interferometric measurements to map the linear and nonlinear refractive index of warm rubidium vapor, with results that may matter for quantum photonics, precision sensing, and compact atomic devices.
Warm Rubidium Vapor Shows Large Kerr Nonlinearity in New Refractive-Index Study 阅读更多 »
A new two-electron model for high-harmonic generation in helium predicts cutoff energies well beyond the standard single-electron limit, with spectra extending to about 1.2 keV under intense few-cycle infrared driving.
Two-Electron High-Harmonic Generation Pushes Soft X-Rays Toward the keV Regime 阅读更多 »
Researchers report a room-temperature near-infrared defect platform in hexagonal boron nitride created by krypton ion implantation, avoiding the usual pre- and post-annealing steps.
Annealing-Free Krypton Implantation Opens a Scalable Path to hBN Quantum Defects 阅读更多 »
Researchers report a photonic higher-order topological insulator whose boundary states arise from Sierpiński-gasket geometry itself, rather than from added synthetic gauge fields or temporal modulation.
Fractal Geometry Becomes a Route to Photonic Topological Boundary States 阅读更多 »
Researchers report a free-running single-cavity dual-comb laser with Hz-level relative linewidth and millisecond-scale molecular spectroscopy, pointing to a compact path for line-shape-resolved gas sensing.
Symmetry-Engineered Fiber Laser Delivers Hz-Level Mutual Coherence for Dual-Comb Sensing 阅读更多 »
A new SNR budget for hollow-core fiber suggests that distributed inter-modal interference, not Kerr nonlinearity, is the main limiter for higher-order QAM. The study outlines how low dispersion and near-vacuum nonlinearity could extend 1024-QAM reach far beyond standard single-mode fiber, while still leaving practical constraints for 2048-QAM and 4096-QAM at 32 GBaud.
Modeling the Real Limits of Higher-Order QAM in Hollow-Core Fiber 阅读更多 »
