Said, Aurore J.Recht, DanielSullivan, Joseph T.Warrender, Jeffrey M.Buonassisi, TonioPersans, Peter D.Aziz, Michael2014-08-262011Said, Aurore J., Daniel Recht, Joseph T. Sullivan, Jeffrey M. Warrender, Tonio Buonassisi, Peter D. Persans, and Michael J. Aziz. 2011. “Extended Infrared Photoresponse and Gain in Chalcogen-Supersaturated Silicon Photodiodes.” Applied Physics Letters 99, no. 7: 073503.0003-6951http://nrs.harvard.edu/urn-3:HUL.InstRepos:12748664Highly supersaturated solid solutions of selenium or sulfur in silicon were formed by ion implantation followed by nanosecond pulsed laser melting. n+p photodiodesfabricated from these materials exhibit gain (external quantum efficiency >3000%) at 12 V of reverse bias and substantial optoelectronic response to light of wavelengths as long as 1250 nm. The amount of gain and the strength of the extended response both decrease with decreasing magnitude of bias voltage, but >100% external quantum efficiency is observed even at 2 V of reverse bias. The behavior is inconsistent with our expectations for avalanche gain or photoconductive gain.en-USSiliconPhotodiodesIon implantationAnnealingAvalanche photodiodesJournal Article2014-08-2610.1063/1.3609871