Table 1.

Summary of the SiPM specification whose secondary photon emission is studied in this work [2,6]. The Fill Factor is defined as the ratio between the photon-sensitive area to the total area of the SiPM. The breakdown voltages are extracted from the SiPM I-V curves; defined as the voltage for which the first derivative with respect to the voltage of the SiPM current (in log space) is at the maximum [23].

Parameter	FBK VUV-HD3	HPK VUV4
Total Area	6 × 6 mm${}^2$	3 × 3 mm${}^2$
SiPM Fill Factor	80%	60%
SPAD pitch	$35\times 35\mathsf{\mu }$m${}^2$	$50\times 50\mathsf{\mu }$m${}^2$
Breakdown Voltage [298 K]	31 ± 1 V	52 ± 1 V