New tunable metasurface can act as axicon or metalens, with potential applications in biological imaging, microscopic measurement, laser fabrication, optical manipulation, multi-plane imaging, depth estimation, and optical data storage. The metasurface is made of titanium dioxide (TiO2) and can be actuated by rotating it between two layers. When light is incident on the metasurface, the rotation of the layers causes the phase of the light to be modulated, which can be used to create either a Bessel beam or a spherical wave front. Bessel beams are non-diffracting beams that can be used to image objects with high resolution. Spherical wave fronts can be used to focus light to different focal lengths. The tunable metasurface could be used to improve the performance of optical imaging systems in a variety of applications. The metasurface could also be used to fabricate optical components, such as lenses and mirrors. This could lead to the development of smaller, more efficient optical devices. Overall, the tunable metasurface is a promising new technology with the potential to revolutionize optical imaging and manipulation.
Flat-band systems in two-dimensional materials have recently attracted considerable interest due to their unique properties. However, the difficulties in electrically detecting the flat-band position in field-effect structures are slowing down the investigation of their properties. In this work, we use indium selenide (InSe) as a flat-band system due to a van Hove singularity at the […]
Zinc oxide nanocrystals are a promising new material that could be used to make spray-on electronic components for ultra-thin, lightweight, and bendable displays and devices. The material is versatile and can be incorporated into many components of future technologies including mobile phones and computers. Researchers at RMIT University in Australia have reviewed production strategies, capabilities, […]
Quantum biological tunneling is a phenomenon where particles can cross barriers that would normally be impassable. This phenomenon plays a role in many essential life functions, such as cellular respiration and homeostasis. Scientists are now exploring the potential of quantum biological tunneling to develop new cancer treatments. One promising approach is to use bio nanoantennae, […]