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Kröninger Group⠀⠀⠀⠀ Delitzsch Junior Group
Department of Physics
Der Campus Nord ist abgebildet. Im Zentrum des Bildes der Mathetower. © Roland Baege​/​TU Dortmund
New Publication

Techniques for the Investigation of Segmented Sensors Using the Two Photon Absorption-Transient Current Technique

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© The Authors

Abstract:
The two photon absorption-transient current technique (TPA-TCT) was used to investigate a silicon strip detector with illumination from the top. Measurement and analysis techniques for the TPA-TCT of segmented devices are presented and discussed using a passive strip CMOS detector and a standard strip detector as an example. The influence of laser beam clipping and reflection is shown, and a method that allows to compensate these intensity-related effects for investigation of the electric field is introduced and successfully employed. Additionally, the mirror technique is introduced, which exploits reflection at a metallised back side to enable the measurement directly below a top metallisation while illuminating from the top.

To the paper:  
Sensors 23(2023)962

Our other publications on the subject of detector development can be found on the corresponding list of publications.