Modeling Approaches for Gain, Noise and Time Response of Avalanche Photodiodes for X-Rays Detection

A. Pilotto; M. Antonelli; F. Arfelli; F. Arfelli; G. Biasiol; G. Cautero; G. Cautero; M. Cautero; M. Colja; F. Driussi; D. Esseni; R.H. Menk; R.H. Menk; R.H. Menk; C. Nichetti; C. Nichetti; F. Rosset; F. Rosset; L. Selmi; T. Steinhartova; T. Steinhartova; P. Palestri

doi:10.3389/fphy.2022.944206

Frontiers in Physics (Aug 2022)

Modeling Approaches for Gain, Noise and Time Response of Avalanche Photodiodes for X-Rays Detection

A. Pilotto,
M. Antonelli,
F. Arfelli,
F. Arfelli,
G. Biasiol,
G. Cautero,
G. Cautero,
M. Cautero,
M. Colja,
F. Driussi,
D. Esseni,
R.H. Menk,
R.H. Menk,
R.H. Menk,
C. Nichetti,
C. Nichetti,
F. Rosset,
F. Rosset,
L. Selmi,
T. Steinhartova,
T. Steinhartova,
P. Palestri

Affiliations

A. Pilotto: DPIA, University of Udine, Udine, Italy
M. Antonelli: INFN—Trieste, Trieste, Italy
F. Arfelli: INFN—Trieste, Trieste, Italy
F. Arfelli: Department of Physics, University of Trieste, Trieste, Italy
G. Biasiol: CNR-IOM, TASC Laboratory, Area Science Park, Trieste, Italy
G. Cautero: Elettra Sincrotrone Trieste, Trieste, Italy
G. Cautero: INFN—Trieste, Trieste, Italy
M. Cautero: Department of Engineering and Architecture, University of Trieste, Trieste, Italy
M. Colja: Department of Engineering and Architecture, University of Trieste, Trieste, Italy
F. Driussi: DPIA, University of Udine, Udine, Italy
D. Esseni: DPIA, University of Udine, Udine, Italy
R.H. Menk: Elettra Sincrotrone Trieste, Trieste, Italy
R.H. Menk: INFN—Trieste, Trieste, Italy
R.H. Menk: Department of Medical Imaging, University of Saskatchewan, Saskatoon, Italy
C. Nichetti: Elettra Sincrotrone Trieste, Trieste, Italy
C. Nichetti: Department of Physics, University of Trieste, Trieste, Italy
F. Rosset: DPIA, University of Udine, Udine, Italy
F. Rosset: DMIF, University of Udine, Udine, Italy
L. Selmi: DIEF, University of Modena and Reggio Emilia, Modena, Italy
T. Steinhartova: Department of Physics, University of Trieste, Trieste, Italy
T. Steinhartova: CNR-IOM, TASC Laboratory, Area Science Park, Trieste, Italy
P. Palestri: DPIA, University of Udine, Udine, Italy

DOI: https://doi.org/10.3389/fphy.2022.944206
Journal volume & issue: Vol. 10

Abstract

Read online

We report on a suite of modeling approaches for the optimization of Avalanche Photodiodes for X-rays detection. Gain and excess noise are computed efficiently using a non-local/history dependent model that has been validated against full-band Monte Carlo simulations. The (stochastic) response of the detector to photon pulses is computed using an improved Random-Path-Length algorithm. As case studies, we consider diodes consisting of AlGaAs/GaAs multi-layers with separated absorption and multiplication regions. A superlattice creating a staircase conduction band structure is employed in the multiplication region to keep the multiplication noise low. Gain and excess noise have been measured in devices fabricated with such structure and successfully compared with the developed models.

Published in Frontiers in Physics

ISSN: 2296-424X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Physics
Website: https://www.frontiersin.org/journals/physics

About the journal

Abstract

Keywords