Enhancement of the infrared detection efficiency of silicon photon-counting avalanche photodiodes by use of silicon germanium absorbing layers.
An enhancement of the infrared detection efficiency of Si photon-counting detectors by inclusion of SiGe absorbing layers has been demonstrated for what is believed to be the first time. An improvement of 30 times in detection efficiency at a wavelength of 1210 nm compared with that of an all-Si structure operated under identical conditions has been measured. The Si/Si(0.7)Ge(0.3) device is capable of room-temperature operation and has a response time of less than 300 ps.
Loudon
Alison Y
AY
Hiskett
Philip A
PA
Buller
Gerald S
GS
Carline
Roger T
RT
Herbert
Dave C
DC
Leong
W Y
WY
Rarity
John G
JG