First Electrically Reconfigurable Phase-Change nIR-Transmissive Metasurface published in Advanced Materials

This study, led by our collaborators Prof. JJ Hu (MIT) and Dr. Hyun-Jung Kim (NASA), demonstrated a non-mechanical, non-volatile transmissive filter based on low-loss phase change materials with a 200 × 200 µm² switching area. The device/metafilter can be consistently switched between low- and high-transmission states using electrical pulses with a switching contrast ratio of 5.5 dB. The device was reversibly switched for 1250 cycles before accelerated degradation took place. The work represents an important step toward realizing free-space reconfigurable optics based on PCMs.