Ga2O3 is a wide bandgap semiconductor suitable for solar‐blind photodetection, but there exist two issues for Ga2O3‐based photodetectors: first, it is difficult to achieve reliable p‐type Ga2O3 and therefore form a homojunction photodetector, and the other is related with the slow response speed of Ga2O3‐based photodetectors. In this work, a self‐powered solar‐blind photodetector with a fast response using a p‐GaN/i‐Ga2O3/n‐Ga2O3 (pin) heterojunction with a fully depleted active region is realized, where i‐Ga2O3 serves as the main light‐absorbing active region. The device exhibits good self‐powered characteristics with a high responsivity of 72 mA W−1, a high photo‐to‐dark current ratio of 18 800, a high specific detectivity of 3.22 × 1012 Jones, and a fast response speed with a rise time/decay time of 7 ms/19 ms, respectively, without an external power supply. A detailed study of the interfacial electronic structure between p‐GaN and i‐Ga2O3 reveals a conduction band offset and valence band offset of 0.16 and 1.37 eV, respectively. Meanwhile, it has a large built‐in potential of 1.03 eV and a wide depletion region width of 235 nm in the i‐Ga2O3 side of heterojunction. It is believed that excellent device performance comes from a suitable energy band structure and wide depletion region.

Considering the limitation of off-line simulation and the high cost of many real-time simulation equipments used in aeronautical and astronautical fields, a low-cost embedded real-time simulation system has been developed for the research of satellite attitude control. By using the mature ARM/DSP chip as the processor and the embedded Linux operating system in the target machine, and the monitoring and management interface based on the graphical programming language LabVIEW in the host computer, this system has successfully addressed key technical issues of real-time simulation. It has optimized the four essential components of the satellite attitude control closed-loop system. Initial application of the system has validated its effectiveness, and therefore proved that it will be significant in the engineering applications.