Engineering the phonon environment of a single quantum dot

par Omar Ortiz Cabello

Projet de thèse en Nanophysique

Sous la direction de Pascale Senellart et de Daniel Lanzillotti Kimura.

Thèses en préparation à Paris Saclay , dans le cadre de École doctorale Ondes et Matière (2015-.... ; Orsay, Essonne) , en partenariat avec Centre de Nanosciences et de Nanotechnologies (laboratoire) et de Université Paris-Sud (établissement de préparation de la thèse) depuis le 01-07-2017 .


  • Résumé

    One of the most striking features of acoustic phonons is their ability to interact with virtually any other excitation in solids. These interactions have strong implications regarding fundamental research fields like optoelectronics, spintronics, and, more recently, quantum information. Recent advances in phonon engineering show that it is actually possible to control and manipulate phonons in nanostructures: the growing field of nanophononics can now propose to use phonons to coherently exchange energy and information, in a wide range of systems.

  • Titre traduit

    Engineering the phonon environment of a single quantum dot


  • Résumé

    Shaping the phononic landscape opens exciting perspectives for solid state optoelectronic and quantum applications, by providing a full control over the main source of decoherence and actually using it as a powerful resource to eventually transfer information. The road leading to this goal is paved with answers to fundamental questions both in nanophononics and nanophotonics. In this respect, the simultaneous engineering of optical and phononic properties led to a new kind of structures called phoXonic crystals, capable of confining simultaneously photons and phonons at ultrahigh acoustic frequencies (“hypersound” in the GHz-THz range). Very recently, it has indeed been shown that an optimized optical GaAs/AlAs microcavity is automatically an optimized acoustic cavity, with strongly enhanced light-matter interactions. This PhD project proposes to investigate novel strategies to confine these fields, and to control the acoustic LDOS of a single quantum dot.