Fig. 1From: Competition between sub-bandgap linear detection and degenerate two-photon absorption in gallium arsenide photodiodes a Schematic drawing of the experimental set-up. b I-P characteristic of the detector under study at -0.5 V using OPO1 (see Table 1). Two regimes are visible : a linear behavior at low flux regime (slope=1, preponderance of PASRH), a quadratic behavior at higher flux (slope=2, preponderance of TPC)Back to article page