Contrôle de l'émission spontanée de lumière par effets collectifs en présence d'un résonateur

Ilan Shlesinger 1
1 Laboratoire Charles Fabry / Naphel
LCF - Laboratoire Charles Fabry
Abstract : Spontaneous emission of light is not an intrinsic property of an emitter. On the one hand, it depends on the electromagnetic environment. On the other hand, it depends on the presence of other emitters with whom it may interact and generate interferences. Up to date, very few studies address the question of multiple interacting emitters coupled to a resonator. The goal of this thesis is to combine both collective effects and nanoresonators to control the spontaneous emission and scattering of light emitters.First, we theoretically study an ideal system consisting of two emitters coupled to a resonator. The emitters are in close proximity, and the dipole-dipole interaction generates a superradiant state and a subradiant state. The system that we obtain behaves as an efficient, and tunable, single photon source and quantum memory. We then switch to the case of a plasmonic resonator with an antisymmetric mode, which allows to efficiently excite the subradiant state. We show that this results in an enhancement of the Purcell effect while maintaining a spectrally narrow state.In the second part of this thesis, we explore a system of a large number of emitters coupled to a surface plasmon travelling along a metal-air interface.The emitters are nanoplatelets, also called colloidal quantum wells. Strong coupling is obtained when a layer of nanoplatelets is deposited on top of the metal. The coupling of the nanoplatelets to the surface plasmon allows to obtain directional and polarized light emission.
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Ilan Shlesinger. Contrôle de l'émission spontanée de lumière par effets collectifs en présence d'un résonateur. Optique [physics.optics]. Université Paris-Saclay, 2019. Français. ⟨NNT : 2019SACLO006⟩. ⟨tel-02155274⟩

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