Non-volatile compact optical phase shifter based on Ge 2 Sb 2 Te 5 operating at 2.3 µm

• Published in: Optical materials express Vol. 12; no. 12; p. 4582
• Main Authors: Miyatake, Yuto, Ho, Chong Pei, Pitchappa, Prakash, Singh, Ranjan, Makino, Kotaro, Tominaga, Junji, Miyata, Noriyuki, Nakano, Takashi, Toprasertpong, Kasidit, Takagi, Shinichi, Takenaka, Mitsuru
• Format: Journal Article
• Language: English
• Published: 01.12.2022

We investigate an optical phase shifter based on Ge 2 Sb 2 Te 5 (GST) integrated with a Si waveguide at mid-infrared (MIR) wavelengths. Since the optical absorption of both amorphous and crystalline GST can be reduced at a longer wavelength, we demonstrate that the optical loss of the phase shifter...