DocumentCode
3219664
Title
Low avalanche excess noise in thin AlxGa1-xAs (x=0.15 and 0.60) avalanche photodiodes
Author
Tan, C.H. ; David, J.P.R. ; Rees, G.J. ; Tozer, R.C. ; Li, K.F.
Author_Institution
Dept. of Electron. & Electr. Eng., Sheffield Univ., UK
fYear
2000
fDate
2000
Firstpage
34
Lastpage
38
Abstract
Avalanche photodiodes with thin avalanche multiplication regions were found to exhibit lower excess noise than those predicted by the conventional local noise theory. Experimental excess noise measurements on a range of sub-micron Al0.6Ga0.4As and Al0.15Ga0.85As homojunction p+in+ diodes show that the excess noise decreases as the avalanche width is reduced below 1 μm. The Al0.6Ga0.4As p +in+ diodes show extremely low excess noise despite the electron and hole ionization coefficients being very similar. Modelling using a nonlocal model indicates that dead space plays an important role in determining the excess noise in thin avalanching regions
Keywords
III-V semiconductors; aluminium compounds; avalanche photodiodes; gallium arsenide; ionisation; p-i-n photodiodes; semiconductor device measurement; semiconductor device models; semiconductor device noise; 1 micron; Al0.15Ga0.85As; Al0.15Ga0.85As homojunction p+in + diodes; Al0.6Ga0.4As; Al0.6Ga0.4As homojunction p+in + diodes; avalanche excess noise; avalanche photodiodes; avalanche width; dead space; electron ionization coefficient; excess noise; excess noise measurements; hole ionization coefficient; local noise theory; nonlocal model; thin AlxGa1-xAs avalanche photodiodes; thin avalanche multiplication regions; thin avalanching regions; Avalanche photodiodes; Charge carrier processes; Diodes; Gallium arsenide; Ionization; Noise reduction; Optical noise; Photodetectors; Substrates; Tunneling;
fLanguage
English
Publisher
ieee
Conference_Titel
Semiconductor Electronics, 2000. Proceedings. ICSE 2000. IEEE International Conference on
Conference_Location
Guoman Port Dickson Resort
Print_ISBN
0-7803-6430-9
Type
conf
DOI
10.1109/SMELEC.2000.932302
Filename
932302
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