Antenna-Based Approach to Fine Control of Supercavity Mode Quality Factor in Metasurfaces.

The utilization of photonic bound states in the continuum (BIC) is a very attractive approach for many applications requiring efficient resonators. High-Q modes related to symmetry-protected BIC are formed due to perturbation defined by an asymmetry parameter, and the smaller this parameter is, the bigger the Q factor can be achieved. Inevitable fabrication imperfectness limits precise control of the Q factor through the asymmetry parameter.

Narrowband diffuse thermal emitter based on surface phonon polaritons.

Thermal emission engineering with ability to realize spectral and spatial selection has attracted great attention in recent years. Nanophotonic control of thermal radiation has demonstrated narrowband thermal emitter but with high angle-sensitivity and diffuse thermal emitter but with low quality factor (). Here, we demonstrate a simultaneous narrowband, diffuse thermal emitter consisting of 80 nm ( View Article and Find Full Text PDF

Three-Dimensional in Situ Electron-Beam Lithography Using Water Ice.

Three-dimensional (3D) nanofabrication techniques are of paramount importance in nanoscience and nanotechnology because they are prerequisites to realizing complex, compact, and functional 3D nanodevices. Although several 3D nanofabrication methods have been proposed and developed in recent years, it is still a formidable challenge to achieve a balance among resolution, accuracy, simplicity, and adaptability. Here, we propose a 3D nanofabrication method based on electron-beam lithography using ice resists (iEBL) and fabricate 3D nanostructures by stacking layered structures and those with dose-modulated exposure, respectively.