Researchers at Lawrence Livermore National Laboratory (LLNL), Livermore, CA, have employed multi-material 3D printing to create tailored gradient refractive index glass optics that could make for ...

Nanoscale optical components, such as lenses and waveguides, are used in imaging and computing platforms. Yet it’s challenging to make these components with more than one refractive index—a property ...

Holographic photopolymers were developed, as the name implies, for holography. However, they can be programmed with a variety of gradient index (GRIN) structures including diffractive and refractive ...

The graphic shows how researchers turned a porous hydrogel into a soft acoustic metapad that can both transmit ultrasound efficiently and focus it over a broad frequency range. Designed with a ...