Tuneable phase change materials enable microscale infrared spectroscopy
Researchers from the Singapore University of Technology and Design (SUTD) in collaboration with Dalian University of Technology (DUT) and the Singapore Sinchrotron Light Source (SSLS) have demonstrated that tuneable phase change materials, which are more typically found in data storage devices, can be used to tune the response of microscale infrared transmissive “metasurface” filters. The filters can be tuned across the broad band of frequencies in the mid-infrared spectrum where many pollutant gasses vibrate.
SUTD lead researcher, Assistant Prof Robert Simpson said, “These infrared filters are so small that they can be incorporated into a smart phone. This would allow you to measure the quality of the oil that has been used to fry your food, measure the air that you breathe, or to measure fluids that are expelled from your body to check the condition of your health,” as published in Advanced Optical Materials.
Illustration of the metasurface interacting with gas molecules. Source: R&D- www.rdmag.com (Industrial Research)