Defense of the doctoral thesis of Pierre GUINEDOR (in closed session), for the University Grenoble Alpes , speciality " NANO ELECTRONICS & NANO TECHNOLOGIES ", entitled:
Z306 Phelma / Minatec
3 Parvis Louis Néel
Study of low frequency noises and of electrically active defects in cooled infrared detectors
Friday, November 8th, 2019 at 2pm
The current trend in the infrared market is to address HOT (High Operating Temperature) applications, which exacerbates the impact of low frequency noises (Random Telegraph Signal (RTS) and 1/f) and then degrades the image quality of cooled HgCdTe detectors. In this work, the focus was laid on the analysis of defects at the root of these noises to, eventually, improve the image quality.
Two paths are introduced: the electro-optical characterization of low frequency noises and the spectroscopic characterization of electrically active defects in the material. First generalities on infrared detection and spectroscopic techniques used in this work are described. Then low frequency noises characterizations are realized to refine the comprehension of their physical mechanisms. Finally DLTS (Deep Level Transient Spectroscopy) studies are performed on two technologies for SWIR (Short Wave InfraRed, λc = 2.5 μm) and MWIR blue ((Mid Wave Infrared, λc = 4.2 μm) bands in order to get to the root of low frequency noises.
Infrared, Low frequency noises, RTS, 1/f, DLTS
M. DANIEL BAUZA , Researcher, CNRS Délégation Alpes France: Supervisor
M. LAURENT RUBALDO, Engineer, LYNRED - Veurey Voroize, France: Co-supervisor
M. GUO-NENG LU, Professor, University Lyon 1, France: Reviewer
M. JEAN-GUY TARTARIN, Professor, University Toulouse-III - PaulL-Sabatier, France: Reviewer
Mme ANNE KAMINSKI-CACHOPO, Professor, Grenoble INP, France: Examiner
M. REMI BARBIER, Assistant professor, ISAE - Supaero - Toulouse, France: Examiner
M. GEORGES BREMOND, Professor, INSA Lyon, France: Examiner
M. SKANDAR BASROUR, Professor, Université Grenoble Alpes, France: Examiner
M. GILLES REIMBOLD, Research Engineer, CEA Grenoble: Invited
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Thesis prepared in the laboratories LYNRED , IMEP-LAHC and CEA/Leti supervised by Daniel BAUZA , supervisor and Laurent RUBALDO, Co-supervisor .