Hao Qu, Weizong Xu, Jiuzhou Zhao, Dong Zhou, Fangfang Ren, Feng Zhou, Dunjun Chen, Rong Zhang, Youliao Zheng, Hai Lu, "4H-SiC-based soft X-ray single photon detector with linear photon energy response," Chin. Opt. Lett. 23, 031202 (2025)
- Chinese Optics Letters
- Vol. 23, Issue 3, 031202 (2025)
Fig. 1. (a) Schematic diagram of the 4H-SiC p-i-n detector. (b) Photograph of the packaged device. (c) Dark I–V characteristics and (d) C–V characteristics of the detector at room temperature.
Fig. 2. (a) Schematic of the resistor-capacitor feedback CSA circuit. (b) Schematic of the reset CSA circuit. AMP, amplifier.
Fig. 3. Time-domain voltage evolution on the capacitor as a result of the detector’s leakage current and active switch turning on.
Fig. 4. A transient output signal as a result of a single soft X-ray photon incidence with a characteristic energy of 5.89 keV.
Fig. 5. (a) FWHM at 5.89 keV (characteristic energy) versus shaping time of the pulse shaping unit. (b) Energy resolution of the 4H-SiC soft X-ray single photon detectors under different characteristic energies.
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