Blog

Novel Metasurfaces Made of Phase-Change Materials

NanoFrazor can be used to locally induce heat-driven phase changes. Dr Ann-Katrin U. Michel and her colleagues from ETH Zürich and RWTH Aachen University are exploring this capability. They proposed a new technique for fabricating near-infrared metasurfaces with feature sizes far below the diffraction limit. Their results were recently published in Advanced Optical Materials.

Phase-change materials such as GeTe, which was the material used in this work, have distinctly different properties depending on whether they are in their crystalline or amorphous state. The heat from the NanoFrazor’s tip drives crystallization of a small volume of the material under the tip. The resulting array of few-nm-sized crystalline dots in amorphous GeTe would significantly change the wavelength at which the resulting metasurface absorbs the light.

In this work, the authors designed a perfect absorber for the near-infrared spectral range. These wavelengths are typically used in telecommunications, so such devices could prove very useful for currently existing technology. A similar approach can also be used for other optics and biosensing applications.

Share:

Share on facebook
Facebook
Share on twitter
Twitter
Share on pinterest
Pinterest
Share on linkedin
LinkedIn

Related Posts

The MPO 100 fabricates micro-optics stitching-free without unwanted artifacts

Stitching-free micro-optics with MPO 100

IFoV writing mode for stitching-free micro-optics Superior quality of optical components without stitching defects can be achieved with Infinite Field-of-View (IFoV) writing mode, using the

The MLA 150 Success Story

From pioneering work to market leadership in maskless laser lithography –  The Heidelberg Instruments MLA 150 Maskless Aligner is an unparalleled success story Since its

Get in Touch

We are always at your disposal.
Please send us your request.

Sign up

Subscribe to our newsletter
to receive the newest information.

Stay connected

Follow us on social media to benefit
from a range of useful resources.

Scroll to Top