https://doi.org/10.1140/epjs/s11734-025-01479-1
Regular Article
A ping-pong self-sustaining avalanche in TI-LGAD sensors
1
Faculty of Natural Sciences and Mathematics, University of Montenegro, Džordža Vašingtona bb, 81000, Podgorica, Montenegro
2
Instituto de Microelectrónica de Barcelona, IMB-CNM-CSIC, Cerdanyola del Vallès, 08193, Barcelona, Spain
3
Jozef Stefan Institute, Jamova Cesta 39, 10 000, Ljubljana, Slovenia
4
Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18221, Prague 8, Czech Republic
5
ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnicí 835, 25241, Dolní Břežany, Czech Republic
Received:
31
July
2024
Accepted:
20
January
2025
Published online:
5
February
2025
This work is a continuation of our previous research on trench-isolated LGAD sensors that reveal exceptionally large, long-duration signals without external stimuli, so called “ghost signals”. Here, we extend the LGAD study to corresponding PIN sensors with the same inter-pixel isolation structure (double trench). In addition to previously studied sensors, we investigated new double-trenched LGADs where the gain layer was co-implanted with carbon. All studied LGADs exhibited spontaneous ghost signals above a certain threshold value of applied bias, whereas it was not observed in corresponding PINs. On the other hand, strong and broad signal was generated in the inter-pixel region of PINs using fs-laser illumination under specific parameters. We will discuss the hypotheses for the mechanism behind these signals.
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
