BE Seminar > Daniele

Wednesday 22 Apr 2026, 09:00 → 10:00 Europe/Zurich

14/5-022 (CERN)

09:00 → 09:50 Silicon Photonics for HEP: characterization of radiation effects in micro-ring modulators and waveguides

Silicon photonics technologies have found major applications in optical transceivers for big data centers. For future high-energy physics experiments, silicon photonics-based transceivers are being investigated at CERN within the EP R&D programs. Recently, this technology has demonstrated promising radiation tolerance, making it increasingly suitable for such applications. This seminar will introduce the basic functionality of a silicon photonics transceiver, followed by a discussion of ionizing radiation effects on two key components: micro-ring modulators (MRMs) and photonic waveguides. The dynamic electro-optic response of the modulators is first characterized up to a TID of 12.3 MGy, including temperature effects and annealing studies that show an almost complete recovery of performance. Silicon photonics waveguides have been characterized through neutron test, showing a moderate increase in radiation-induced attenuation, and they have been investigated under heavy-ion irradiation for the first time, revealing a strong tolerance to optical single-event transients (OSETs). Preliminary TCAD simulation results are also presented, finding a good agreement with both the literature and the experimental heavy-ion measurements.

Speaker: Daniele Alfiero (University of Birmingham (GB))

SectionSeminar_20260422.pdf

SectionSeminar_20260422.pptx

09:50 → 10:00 Questions and Answers