Silicon-based, broadband, waveguide-integrated electro-optical switch

US9529158B2 · kind B2 · utility

Assignee

• The George Washington University · US

Inventors

• Volker J. Sorger · Alexandria, US
• Chenran Ye · Fairfax, US
• Ke Liu · 安丰镇, CN

Key dates

• Filing date: Oct 30, 2014
• Grant date: Dec 27, 2016
• Expiry date: Oct 30, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/3133
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An electro-optical switch or router includes a semiconductor oxide substrate and first, second, and third semiconductor waveguides disposed on the semiconductor oxide substrate. The third waveguide includes a transparent conducting oxide layer, an oxide layer, a metal layer, and first and second electrodes coupled to the third waveguide. The electrodes are configured to bias and unbiased the third waveguide to effect optical switching in the electro-optical switch. The oxide layer is disposed between the transparent conducting oxide layer and the metal layer. The switch may further include a semiconductor layer disposed under the transparent conducting oxide layer between the transparent conducting oxide layer and the semiconductor oxide substrate. The first electrode may be coupled to the transparent conducting oxide layer, and the second electrode may be coupled to the metal layer.