Détecteurs et lasers THz à base d'antennes accordables en fréquence

Abstract : Optoelectronic devices are crucial for many applications in everyday life: computers, smartphones, connected objects in general.The THz range (0.1-10 THz) still remains industrially unexploited because of the intrinsic difficulties to produce or generate THz photons. However, many applications exist for THz radiation : in the medical field for example, for the sensitive detection of gases, or for the imaging of concealed objects in the visible range.This thesis focuses on quantum well photodetectors (QWIPs) and quantum cascade lasers (QCLs) operating in the THz range in order to develop compact, fast and sensitive devices (but operating at cryogenic temperatures).We used Split Ring Resonators (SRR), inspired by metamaterial research, in order to design and develop subwavelength tunable THz detectors with an external inductance.Concerning lasers, this thesis studies THz micro-lasers using microdisk resonators with the aim of designing and manufacturing lasers operating on the fundamental electromagnetic mode (dipolar mode). The future perspective of this work is to build an entirely sub-wavelength and fast laser in the THz spectral range.
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Claire Abadie. Détecteurs et lasers THz à base d'antennes accordables en fréquence. Micro et nanotechnologies/Microélectronique. Université Paris-Saclay, 2019. Français. ⟨NNT : 2019SACLS145⟩. ⟨tel-02193687⟩

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