[22a-D215-1~9] 3.14 Optical control devices and optical fibers

[22a-D215-5] Multi-physics simulation of optical switch operation using a phase change material

〇Haruyuki Sano¹, Masashi Kuwahara² (1.NIT, Ishikawa Col., 2.AIST)

Keywords:optical switch, phase change, GST

In order to fully understand the behavior of phase change optical switch, we have developed a multi-physics simulation system including a realistic phase change model. The process of controlling the GST (Ge₂Sb₂Te₅) phase change by Joule heat generated from the ITO heater layer was investigated. It was found that during the quenching process to form an amorphous GST, recrystallization occurs in a part of the GST layer, which reduces the transmittance in the ON state of the optical switch.