Reliable large-area germanium photodetectors fabricated with a diffused junction from in situ III-V epitaxial material

Charles B. Morrison; Joseph C. Boisvert; Rengarajan Sudharsanan; Moran Haddad; Takahiro Isshiki; Dmitri D. Krut; Richard R. King; Nasser H. Karam

doi:10.1117/12.504799

8 December 2003 Reliable large-area germanium photodetectors fabricated with a diffused junction from in situ III-V epitaxial material

Charles B. Morrison, Joseph C. Boisvert, Rengarajan Sudharsanan, Moran Haddad, Takahiro Isshiki, Dmitri D. Krut, Richard R. King, Nasser H. Karam

Author Affiliations +

Proceedings Volume 5209, Materials for Infrared Detectors III; (2003) https://doi.org/10.1117/12.504799
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Low cost germanium photodetectors for sensing applications in the 900-1600 nm spectral region have been developed. By varying the Ge substrate resistivity as well as device area, photodetector properties such as reverse leakage current, capacitance, and shunt resistance have been engineered. Low leakage current devices of various sizes up to 1 cm² have been fabricated and have consistently exhibited exceptionally high shunt resistances and excellent linearity. Over 5000 hours of active stress testing have left the ultra-low leakage currents unchanged. These data were measured in accordance with Telcordia 468-CORE requirements at 85°C, 125°C and 175°C. The results indicate that these mesa photodetectors meet telecommunication industry requirements for reliability. These devices are comparable to commercially available Ge photodetectors, and can be readily substituted for more complex InGaAs photo-detectors in applications such as laser monitor diodes.

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Charles B. Morrison, Joseph C. Boisvert, Rengarajan Sudharsanan, Moran Haddad, Takahiro Isshiki, Dmitri D. Krut, Richard R. King, and Nasser H. Karam "Reliable large-area germanium photodetectors fabricated with a diffused junction from in situ III-V epitaxial material", Proc. SPIE 5209, Materials for Infrared Detectors III, (8 December 2003); https://doi.org/10.1117/12.504799

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