Reference : Sensitivity enhancement of metal-semiconductor-metal photodetectors on low-temperatur...
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
http://hdl.handle.net/10993/20222
Sensitivity enhancement of metal-semiconductor-metal photodetectors on low-temperature-grown GaAs using alloyed contacts
English
Mikulics, M. [Institute of Bio- and Nanosystems, Center of Nanoelectronic Systems for Information Technology (CNI), D-52425 Jülich, Germany]
Marso, Michel mailto [Institute of Bio- and Nanosystems, Center of Nanoelectronic Systems for Information Technology (CNI), D-52425 Jülich, Germany]
Wu, S. [Department of Electrical and Computer Engineering and Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14627, USA]
Fox, A. [Institute of Bio- and Nanosystems, Center of Nanoelectronic Systems for Information Technology (CNI), D-52425 Jülich, Germany]
Lepsa, M. [> >]
Grützmacher, D. [Institute of Bio- and Nanosystems, Center of Nanoelectronic Systems for Information Technology (CNI), D-52425 Jülich, Germany]
Sobolewski, R. [Department of Electrical and Computer Engineering and Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14627, USA]
Kordoš, P. [Institute of Electrical Engineering, Slovak Academy of Sciences, SK-84104 Bratislava, Slovak Republic, and Department of Microelectronics, Slovak University of Technology, SK-81219 Bratislava, Slovak Republic]
15-Jun-2008
IEEE Photonics Technology Letters
Institute of Electrical and Electronics Engineers
20
12
1054-1056
Yes
International
1041-1135
1941-0174
New York
NY
[en] Alloyed contacts ; lowt-emperature GaAs ; MSM photodetectors
[en] We have fabricated and characterized metal–semiconductor–metal (MSM) photodetectors based on lowtemperature-grown GaAs with alloyed (i.e., ohmic-type) contacts. The annealed contacts optimize the electric field distribution inside the photodetector structure which results in an up-to-200% responsivity increase of the devices, compared to conventional MSM detectors with standard nonalloyed (Schottky-type) metallization fabricated on identical material. The improved MSM device with alloyed contacts shows more than three times larger output amplitude at illumination with a 100-fs Ti : sapphire laser, compared to the nonalloyed devices, without degradation of detector speed.
http://hdl.handle.net/10993/20222

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