Karaca, UtkuKizilkan, EkinBruschini, ClaudioCharbon, Edoardo2025-01-252025-01-252025-01-252024-12-0110.1038/s41598-024-78070-62-s2.0-85208778856https://infoscience.epfl.ch/handle/20.500.14299/24419739511341Designing SPADs with high sensitivity in a wide wavelength range is crucial since the applications utilizing SPAD-based sensors target different parts of the spectrum. Here, we introduce a novel technique to achieve a wider sensitivity spectrum through the insertion of a second multiplication region into the depletion region. Thanks to the proposed method, at 5.5 V excess bias voltage, the fabricated devices achieved a PDP of 78% peak at 500 nm and 25.5% at 850 nm wavelength. At the same excess bias, we measured a normalized noise of 3.7 cps/μm2 and a jitter of 165 ps at 517 nm FWHM.entruetext::journal::journal article::research article