Effects of LEO space exposure on GeSbTe phase-change metasurface spectral filters (Conference Presentation)

We report the results of the effect of prolonged low-Earth orbit exposure on phase-change materials (PCMs) and PCM-based metasurfaces. During a 6-month exposure as part of the Materials on the International Space Station Experiment (MISSE-14) test campaign led by NASA Langley Research Center, Ge2Sb2Te5 (GST) and GST-based metasurface spectral filters were monitored for their response to extreme temperature cycles, UV and ionizing radiation fluences, and atomic oxygen fluences. Upon return to Earth, the samples were characterized and compared to their pre-flight condition to glean insight into the effects of the space environment on metasurface performance and PCM optical and structural properties.