Generation of Diffraction-Free Optical Beams Using Wrinkled Membranes

Optical Antenna-based Fluorescence Correlation Spectroscopy to Probe the Nanoscale Dynamics of Biological Membranes

The plasma membrane of living cells is compartmentalized at multiple spatial scales ranging from the nano- to the meso-scale. This non-random organization is crucial for a large number of cellular functions. At the nanoscale, cell membranes organize into dynamic nano-assemblies enriched by cholesterol, sphingolipids and certain types of proteins. Investigating these nano-assemblies known as lipid rafts is of paramount interest in fundamental cell biology. However, this goal requires simultaneous nanometer spatial precision and microsecond temporal resolution which is beyond the reach of common…

Attosecond Control of Electron Beams at Dielectric and Absorbing Membranes

Ultrashort electron pulses are crucial for time-resolved electron diffraction and microscopy of fundamental light-matter interaction. In this work, we study experimentally and theoretically the generation and characterization of attosecond electron pulses by optical-field-driven compression and streaking at dielectric or absorbing interaction elements. The achievable acceleration and deflection gradient depends on the laser-electron angle, the laser's electric and magnetic field directions and the foil orientation. Electric and magnetic fields have similar contributions to the final effect and…

自由悬浮薄膜超表面中高Q透射共振增强生化传感

Enhanced biochemical sensing with high-Q transmission resonances in free-standing membrane metasurfaces

本文提出基于BIC与EIT模式的自由悬浮硅膜超表面，在透射模式下实现高Q中红外共振，并验证其对PMMA薄膜强耦合和蛋白质单层生物传感能力，为紧凑集成生化传感平台开辟新途径。

Nanometer-scale photon confinement in topology-optimized dielectric cavities

Nanotechnology enables in principle a precise mapping from design to device but relied so far on human intuition and simple optimizations. In nanophotonics, a central question is how to make devices in which the light-matter interaction strength is limited only by materials and nanofabrication. Here, we integrate measured fabrication constraints into topology optimization, aiming for the strongest possible light-matter interaction in a compact silicon membrane, demonstrating an unprecedented photonic nanocavity with a mode volume of $V\sim3\times10^{-4}\,λ^3$, quality factor $Q\sim1100$, and f…

Magnified Image Spatial Spectrum (MISS) microscopy for nanometer and millisecond scale label-free imaging

Label-free imaging of rapidly moving, sub-diffraction sized structures has important applications in both biology and material science, as it removes the limitations associated with fluorescence tagging. However, unlabeled nanoscale particles in suspension are difficult to image due to their transparency and fast Brownian motion. Here we describe a novel interferometric imaging technique referred to as Magnified Image Spatial Spectrum (MISS) microscopy, which overcomes these challenges. The MISS microscope provides quantitative phase information and enables dynamic light scattering investigati…

集成混合等离激元-光子器件设计，用于自旋电子存储器的全光开关与读取

Design of an integrated hybrid plasmonic-photonic device for all-optical switching and reading of spintronic memory

本文设计了一种集成混合等离激元-光子器件，通过双V形金纳米天线与光子晶体腔耦合，实现纳米级亚铁磁比特的全光开关与读取，克服了尺寸失配等挑战，优于裸波导。

集成光子平台中纳米级磁位元的光学读取

Optical Reading of Nanoscale Magnetic Bits in an Integrated Photonic Platform

提出一种集成混合等离激元–光子器件，利用V形金纳米天线和偏振旋转器实现磁赛道中纳米级垂直磁位元的PMOKE光学读取。