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The mid-infrared is an interesting part of the electromagnetic spectrum composed of colours that cannot be seen by the human eye. Many chemical molecules resonate when illuminated by infrared light. This infrared resonance can then be used to identify or "fingerprint" the molecules. The infrared is, therefore, useful for a range of applications, including atmospheric pollution monitoring, detecting explosives and narcotics, measuring food quality, and many others. However, infrared optical components tend to be large, expensive, and non-tunable.
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 tunable phase change materials, which are more typically found in data storage devices, can be used to tune the response of microscale...
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