A broadband terahertz fingerprint metasensor is proposed based on Brillouin zone folding‐driven quasi‐bound states in the continuum. By establishing a distributed array of high‐Q resonant probes, this sensor achieves a 14‐fold sensitivity enhancement and enables high‐fidelity retrieval of molecular fingerprints across 0.3–0.8 THz, offering a versatile ...
Yihan Xu +4 more
wiley +1 more source
Continuous phylogeography reveals shifting environmental drivers of highly pathogenic avian influenza H5 spread in Italy, 2016-23. [PDF]
Fornasiero D +10 more
europepmc +1 more source
Hybrid Metalens–Compressive Sensing Imaging System for Ultra‐Low‐Power Edge Detection
We propose an ultra‐low‐power edge detection imaging system through the combination of a spiral metalens and a compressive sensor. By moving the edge detection to a passive optical element, not only is the required power reduced but also the encoded edge image provides rich high‐frequency information, which provides high‐fidelity image reconstruction ...
Sejin Yoon +3 more
wiley +1 more source
Transmissive metasurface with 3.5-μm-thick liquid crystals for subterahertz-wave dynamic beamforming. [PDF]
Kitayama D +4 more
europepmc +1 more source
The Green’s function integral framework provides a unified physical picture of microscopic phase mismatch and introduces a phase‐matching factor (PMF) as a quantitative design metric for harmonic coherence. By rational phase engineering, this approach achieves a PMF of 0.91 and an SHG efficiency of 26.7% in compact nonlinear nanophotonic devices ...
Chengkang Liang +4 more
wiley +1 more source
Compact way to generate guide star for wavefront sensing in Bessel two-photon microscopy. [PDF]
Luo F +5 more
europepmc +1 more source
Dynamic One‐Dimensional Beam Shaping via a Mechanically Tunable Bilayer Metasurface
We propose a generalized method for designing a bilayer metasurface for mechanically tuning one‐dimensional beams. The lateral displacement between layers directly affects the final phase profile of the system, thereby modulating the beam characteristics. Orthogonal decoupling of the modulation and wavefront shaping enables simple and versatile 1D beam
Jun Seok Yoon +5 more
wiley +1 more source
Wavenumber-space wavefront sensorless adaptive-optics for optical coherence tomography. [PDF]
Ruiz-Lopera S +3 more
europepmc +1 more source
Fundamental Building Blocks for Scalable Photonic Programmable Processors
Silicon photonic programmable processors are advanced through the optimisation and experimental validation of key building blocks, including splitters, phase shifters and crossings. In this work, their scalability is experimentally demonstrated at the wafer scale, and their circuit‐level impact is showcased in a high‐speed 4 × 4 optical switch ...
Cristina Gómez‐Hidalgo +11 more
wiley +1 more source
Generation of vectorial generalized vortex array with metasurfaces. [PDF]
Yao Q, Li Z, Zheng G.
europepmc +1 more source

