An Ultra-Thin Terahertz Metalens

The new collimator made of a metasurface has an extremely high refractive index and low reflectance

Pushing Photons for More Efficient LEDs

Metasurface design methods can make LED light act more like lasers

Switching Between Transparent and Reflective

A new metamaterial capable of changing its optical properties without any mechanical input

Focus-Free Camera with a New Flat Lens

New technology poised to drastically reduce weight, complexity and cost of cameras while increasing functionality

Metamaterials for Analog Image Processing

A new filter differentiates the incoming light directly to image the edges of the object

Nanoslits for Valleytronics

2D material can emit light with valley-dependent circular polarization

Metasurface Reflects Light Only in One Direction

A first optical metasurface with controllable ultrafast time-varying properties breaking optical reciprocity

Metasurface with Helical Patterns

New device can control optical fields in three dimensions

Ultra-Thin Optical Devices Directly Measure Polarization

Holograms made with metasurfaces could enable fast, compact polarization measurements for spectroscopy

Sculpting Super-Fast Light Pulses

A metasurface with nanopillars shapes light precisely for practical applications