# "Folded" Optical Devices Manipulate Light in a New Way

**Source**: https://aph.caltech.edu/news/folded-optical-devices-manipulate-light-in-a-new-way
**Parent**: https://aph.caltech.edu/people/faraon

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"Folded" Optical Devices Manipulate Light in a New Way

# "Folded" Optical Devices Manipulate Light in a New Way

October 30, 2018

[Andrei Faraon](https://aph.caltech.edu/people/faraon), Professor of Applied Physics, and colleagues have introduced a technology called "folded metasurface optics," which is a way of printing multiple types of metasurfaces onto either side of a substrate, like glass. In this way, the substrate itself becomes the propagation space for the light. As a proof of concept, the team used the technique to build a spectrometer. Such compact spectrometers have a variety of possible uses, including as a noninvasive blood-glucose measuring system. [[Caltech story](http://www.caltech.edu/news/folded-optical-devices-manipulate-light-new-way-84235)]

Written by

Trity Pourbahrami

Professor Andrei Faraon

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