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Avalanche multiplication in AlxGa1-xAs (x=0to0.60)

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Figure

Fig. 1.Three measured photocurrents (open symbols) and a measured darkcurrent (lines) from the AlGaAs samples with w = 0:5 �m (; — —)and w = 0:05 �m (r; � �): Also shown are a typical photocurrent (+) anddark current (- - -) measured from a w = 0:05 �m GaAs device.
Fig. 3.The total voltage (including the built in voltage) at breakdown (filledx = 0:30 (�;symbols) and the onset of measurable multiplication (open symbols) versusi-region thickness for the investigated compositions
Fig. 5.MC-simulated M(open symbols) and M(closed symbols) curvesplotted as ln(M � 1) for ideal p-i-ns of GaAs (——), AlGaAs (��), and AlGaAs (- - -) with w = 1 �m (�; �); 0.1 �m (�;), and0.05 �m (r;):
Fig. 6.Position dependent ionization coefficients in ideal w = 1 �m (topplot) and w = 0:1 �m (bottom plot) p-i-ns at M= 5 calculated using theMC model: GaAs (——), AlGaAs (� �) and AlGaAs (- - -).Dead-space regions are indicated on the plot.
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