Highly efficient metalenses for imaging applications at infrared wavelengths
26 January 2022 • 2:10 PM - 2:30 PM PST | Room 50 (Lower Mezzanine South)
The optical efficiency of metalenses is extremely important for practical applications. With only limited efficiency, useful light is lost. This can for example result in reduced sensitivity. Even worse, the light, will appear as straylight that can result in ghost images, reduced resolution, reduced contrast etc. depending on the specific application. Here, metalenses optimized for a wavelength of 940 nm are experimentally demonstrated with an absolute focusing efficiency of up to 94% measured as the optical power transmitted to the focal spot divided by the power incident on the lens element. The function of the highly efficient metalenses is demonstrated in a camera module. The resulting images are sharp, crisp and artefact free.
NIL Technology ApS (Denmark)
Ulrich Quaade is Head of Optics at NIL Technology.