[17a-Z10-1~10] 3.15 Silicon photonics and integrated photonics

[17a-Z10-8] Mid-infrared optical phase shifter based on phase change material operating at 2.4 um

〇(M2)Yuto Miyatake¹, Chong Pei Ho¹, Kotaro Makino², Junji Tominaga², Noriyuki Miyata², Takashi Nakano², Naoki Sekine¹, Kasidit Toprasertpong¹, Shinichi Takagi¹, Mitsuru Takenaka¹ (1.The Univ. of Tokyo, 2.AIST)

Keywords:phase change material, mid-infrared, phase shifter

We talk about a nonvolatile mid-infrared optical phase shifter based on GST, which is one of the most common phase change materials. In the JSAP Autumn Meeting 2020, we reported a mid-infrared optical phase shifter operating at the wavelength of 2 um. In this presentation, we report the phase shift and loss at 2.4 um and show the reduction of the loss compared with that at 2 um.