Work

A new double multiplication region method to design high sensitivity and wide spectrum SPADs in standard CMOS technologies

Year: 2024

Type: article

Abstract: Designing 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.

Source: Scientific Reports

DOI: 10.1038/s41598-024-78070-6

Authors: Utku Karaca, Ekin Kizilkan, Claudio Bruschini, Edoardo Charbon

Institution: École Polytechnique Fédérale de Lausanne

Language: English

Topic: Advanced Optical Sensing Technologies

Subfield: Instrumentation

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,590

Funders: U.S. Department of Energy, Lawrence Livermore National Laboratory