Dynamics of microcavity polaritons at the non-linear regime crossover

• Autores: Dario Ballarini
• Directores de la Tesis: Luis Viña (dir. tes.)
• Lectura: En la Universidad Autónoma de Madrid ( España ) en 2008
• Idioma: inglés
• Materias:
  • Física
    • Física del estado sólido
• Enlaces
  • Tesis en acceso abierto en: Biblos-e Archivo
• Resumen

  • Contents pag. 1 Chapter 1: Introduction 9 Chapter 2: Semiconductor microcavities 9 2.1: Distributed Bragg Reflector and photon modes in the cavity 13 2.2: Semiconductor microcavity and exciton-photon coupling 18 2.3: Polarization properties 21 Chapter 3: Samples and experimental setup 21 3.1: Samples 21 3.1.1: CdTe-based microcavities 22 3.1.2: GaAs-based microcavities 25 3.2: Experimental set-up 28 3.3: Time-resolved PL set-up 33 Chapter 4: Pinning of the polarization of the light emission in semiconductor microcavities 33 4.1: Spin relaxation in semiconductor microcavities 37 4.2: Polarization degrees 39 4.3: Polariton dynamics: three excitation regimes 40 4.4: Polaritons spin dynamics under non-resonant excitation: exciton-cavity detuning dependence 45 4.5: Pinning of the linear polarization degree 54 4.6: Summary ix 59 Chapter 5: High-density polariton systems under non-resonant excitation 59 5.1: Introduction: strong-coupling and Bose-Einstein condensation 61 5.2: Non-resonant experiments 67 5.3: Transition from the strong to the weak coupling regime 70 5.3.1: Polarization dependence 76 5.3.2: Spatial distribution of strong- and weak-coupled polaritons 81 5.4: Summary 85 Chapter 6: High-density polariton system under resonant excitation 85 6.1: OPO and OPA 89 6.2: Coherence 90 6.2.1: Non-resonant pumping 91 6.2.2: Resonant pumping 93 6.3: Hydrodynamics 94 6.4: Parametric scattering 97 6.5: Dynamical stability of the pump-only state 100 6.6: Response to a weak perturbation and the Goldstone mode 104 6.7: Long-lived polariton states in semiconductor microcavities across the parametric threshold 112 6.8: Summary 117 Chapter 7: General conclusions