Abstract

We design and demonstrate, to the best of our knowledge, the first whispering gallery germanium-on-silicon photodetector with evanescent coupling from a silicon bus waveguide in a CMOS-compatible process. The small footprint (63.6  μm2), high responsivity (1.04  A/W at 1530 nm), low bias voltage (1  V), low dark current (2.03 nA), and large optoelectric bandwidth (32.9 GHz) of the detector enable simultaneous wavelength filtering and power detection, ideal for handling large network data traffic. In addition, with the resonant nature of the detector, we also optimize the design to enable long-wavelength detection, achieving a separate device with a detection range of up to 1630 nm with a >0.45  A/W responsivity, making it an important building block for optical communication networks.

© 2017 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Monolithic integration and synchronous operation of germanium photodetectors and silicon variable optical attenuators

Sungbong Park, Tai Tsuchizawa, Toshifumi Watanabe, Hiroyuki Shinojima, Hidetaka Nishi, Koji Yamada, Yasuhiko Ishikawa, Kazumi Wada, and Seiichi Itabashi
Opt. Express 18(8) 8412-8421 (2010)

Ultra-low capacitance and high speed germanium photodetectors on silicon

Long Chen and Michal Lipson
Opt. Express 17(10) 7901-7906 (2009)

Waveguide based compact silicon Schottky photodetector with enhanced responsivity in the telecom spectral band

Ilya Goykhman, Boris Desiatov, Jacob Khurgin, Joseph Shappir, and Uriel Levy
Opt. Express 20(27) 28594-28602 (2012)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription