Abstract

We present a ${\mathrm{Ge}}_2{\mathrm{Sb}}_2{\mathrm{Te}}_5$ (GST)-integrated ring resonator with the tuning enabled by an all-optical phase change of GST using a sequence of optical pulses. The tuning is non-volatile and repeatable, with no static power consumption due to the “self-holding” feature of the GST phase-change material. The 2 μm long GST can be partially crystallized by controlling the number of pulses, increasing the tuning freedom. The coupling between the ring resonator and the bus waveguide is based on an asymmetric Mach–Zehnder interferometer. The coupling strength is wavelength-dependent, so that an optimal wavelength can be selected for the probe light to get more than 20 dB transmission contrast between the amorphous and crystalline GST states.

© 2018 Optical Society of America

GST-on-silicon hybrid nanophotonic integrated circuits: a non-volatile quasi-continuously reprogrammable platform

Jiajiu Zheng, Amey Khanolkar, Peipeng Xu, Shane Colburn, Sanchit Deshmukh, Jason Myers, Jesse Frantz, Eric Pop, Joshua Hendrickson, Jonathan Doylend, Nicholas Boechler, and Arka Majumdar
Opt. Mater. Express 8(6) 1551-1561 (2018)

Switchable distributed Bragg reflector using GST phase change material

Roseanna Lawandi, Remona Heenkenda, and Andrew Sarangan
Opt. Lett. 47(8) 1937-1940 (2022)

All-optical tuning of EIT-like dielectric metasurfaces by means of chalcogenide phase change materials

E. Petronijevic and C. Sibilia
Opt. Express 24(26) 30411-30420 (2016)

Phase-change material-assisted all-optical temporal differentiator

Pengxing Guo, Sijing Yu, Weigang Hou, and Lei Guo
Opt. Express 31(3) 4306-4318 (2023)

Controlled switching of phase-change materials by evanescent-field coupling in integrated photonics [Invited]

Carlos Rios, Matthias Stegmaier, Zengguang Cheng, Nathan Youngblood, C. David Wright, Wolfram H. P. Pernice, and Harish Bhaskaran
Opt. Mater. Express 8(9) 2455-2470 (2018)