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Ultra-low capacitance and high speed germanium photodetectors on silicon
1School of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853, USA. lc286@cornell.edu
Optics Express
|May 13, 2009
Abstract:
We demonstrate waveguide integrated germanium detectors with capacitance as small as 2.4 fF and directly recorded impulse response as fast as 8.8 ps. Based on such detectors and cascaded silicon microring resonators we also demonstrate a highly scalable wavelength division demultiplexing system that can potentially provide tera-bit/s (Tbps) bandwidth over a small area.

