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

Nano-Micro-Lithography Symposium

Progress in nanofabrication never stops. Tools and processes keep evolving, enabling devices that were not feasible just a few years ago. The annual – and already traditional – Nano-Micro-Lithography Symposium is a place where you can get all important updates about the available solutions for making advanced devices.On June 30, starting at 10 am CEST

New Heidelberg Instruments website

Heidelberg Instruments has a new digital home now. Besides refreshing the look of the website, we have introduced easier navigation and updated the description of all our tools. With so many tools to choose from and different technical aspects to take into account, it might be hard to choose the which of our solutions will

Heidelberg Instruments Nano: outdoor activity challenge

The global pandemic and home office made our life more sedentary. To counter that, the team of Heidelberg Instruments Nano in Zürich decided to support each other in being more active outdoors. This support came with a competitive twist: HI Nano announced a movement challenge. Any activities count, as long as they happen outdoors and

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.

Scroll to Top