Details

Autor(en) / Beteiligte

• Byrd, Matthew J
• Timurdogan, Erman
• Su, Zhan
• Poulton, Christopher V
• Fahrenkopf, Nicholas M
• Leake, Gerald
• Coolbaugh, Douglas D
• Watts, Michael R

Titel

Mode-evolution-based coupler for high saturation power Ge-on-Si photodetectors

Ist Teil von

• Optics letters, 2017-02, Vol.42 (4), p.851-854

Ort / Verlag

United States

Erscheinungsjahr

2017

Quelle

Optica Publishing Group (OPG)

Beschreibungen/Notizen

• We propose a mode-evolution-based coupler for high saturation power germanium-on-silicon photodetectors. This coupler uniformly illuminates the intrinsic germanium region of the detector, decreasing saturation effects, such as carrier screening, observed at high input powers. We demonstrate 70% more photocurrent generation (9.1-15.5 mA) and more than 40 times higher opto-electrical bandwidth (0.7-31 GHz) than conventional butt-coupled detectors under high-power illumination. The high-power and high-speed performance of the device, combined with the compactness of the coupling method, will enable new applications for integrated silicon photonics systems.