Fig. 1. (Color online) (a) Schematic drawing of the epitaxy structure of the device. (b) Band structure of the EB and HB parts.

Fig. 2. (Color online) (a) The dark current density curves of the device at different temperatures. (b) The Arrhenius plots of the dark current density vs temperature of the device at –0.2 and –2.75 V.

Fig. 3. (Color online) (a) The normalized photoresponse spectra of the ICIP device at different temperatures. (b) and (c) are the peak responsivity of the ICIP device vs bias voltage at different temperature ranges.

Fig. 4. (Color online) (a) The peak responsivity, the QE and the D* of the detector at different temperatures. (b) The D* spectra at four different temperatures.