Title :
Performance optimization of waveguided germanium pin photodetector for optical communication applications
Author :
Lim, Andy Eu-Jin ; Tsung-Yang Liow ; Ning Duan ; Kok Kiong Chen ; Tern, Roger Poh Cher ; Guo-Qiang Lo
Author_Institution :
Inst. of Microelectron., A*STAR (Agency for Sci., Technol. & Res.), Singapore, Singapore
Abstract :
We investigated the impact of contact engineering for Germanium photodetectors performance optimization. Split contacts increased the PD responsivity by ~2 times when compared to rectangle or island block contacts. In addition, dark current and bandwidth was shown to be highly dependent on n++ doping region whereby there is a trade-off for both parameters. From this work, a route to high responsivity and high speed detector can be achieved.
Keywords :
elemental semiconductors; germanium; integrated optics; integrated optoelectronics; optical communication equipment; optical sensors; optimisation; photodetectors; semiconductor doping; Ge; bandwidth; dark current; high-responsivity detector; high-speed detector; integrated optoelectronics; island block contact; n++ doping; optical communication application; performance optimization; rectangle block contact; split contact engineering; waveguided germanium p-i-n photodetectors; CMOS integrated circuits; Optical design; Optical sensors; Optical surface waves; Silicon;
Conference_Titel :
Photonics Global Conference (PGC), 2012
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-2513-4
DOI :
10.1109/PGC.2012.6458013
