Design of an optical triode switch using phase-change material

IEICE Electronics Express

article

Kenta Sakamoto¹  Hiroyuki Tsuda¹ 

[1] Dept. of Electronics and Electrical Engineering, Keio University

关键词: phase-change material;    optical switch;    silicon photonics;    optical waveguide;    optical triode;    Ge2Sb2Te5;   

DOI  :  10.1587/elex.19.20220155

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

An optical triode switch using phase change material (PCM) operating as a Mach-Zehnder interferometer (MZI) or as a directional coupler (DC) is proposed. The characteristics of optical triode switches are calculated by using finite-difference time-domain (FDTD) method. Ge2Sb2Te5 (GST) and Ge2Sb2Se4Te1 (GSST) are used as the PCM. In our calculation models, the signal light has a wavelength of 1550 nm, and the phase of the PCM is controlled by light with a wavelength of 1300 nm input into additional waveguides. In the MZI-type triode switch, PCM patches are laid on several crossings between the signal waveguides and the control waveguides. The DC-type triode switch consists of three parallel waveguides, and the control light is input to the center waveguide which has the PCM layer on it. The structures are optimized to have low loss and low crosstalk. In addition, the energy and pulse power required to change the phase are estimated for both types of switches.

【 授权许可】

CC BY