Integrated single photon sources with colloidal semiconductor nanocrystals (Conference Presentation)

Abstract

Core/shell colloidal semiconductor nanocrystals are very efficient room temperature single photon emitters. In particular, in asymmetric core/shell nanoparticles (dots-in rods) with a spherical CdSe core surrounded by a rod-like CdS shell, blinking effects, multi-excitonic emission and polarization of the emitted photons can be independently controlled by tuning the shell dimensions [1]. This allows an unprecedented capability in radiative channels engineering, making dot-in-rods “state of the art” blinking-free sources of polarized single photons on-demand. In this talk I will discuss our recent results and the different strategies we are pursuing to develop hybrid photonic devices by coupling single nanocrystals with photonic structures such as deep parabolic mirrors [2], liquid crystals [3], semiconductor nanowires [4] and tapered nanofibers. In particular the deposition of a single emitter on a nanofiber and the observation of single photon statistics through the guided mode of the fiber will be reported. Finally I will show how this hybrid system is a very promising playground for novel chiral optics experiments, including a spin-orbit coupling effect for light [5]. [1] F. Pisanello, G. Lemenager, L. Martiradonna, L. Carbone, S. Vezzoli, P. Desfonds, P.D. Cozzoli, J.P. Hermier, E. Giacobino, R. Cingolani, M. DeVittorio & A. Bramati, Non-blinking single photon generation with anisotropic colloidal nanocrystals : toward Room-temperature efficient colloidal quantum sources, Advanced Materials, 25, 1974 (2013) [2] V. Salakhutdinov, M. Sondermann, L. Carbone, E. Giacobino, A. Bramati, G. Leuchs, Optical trapping of nanoparticles by full solid-angle focusing , Optica, 3, 1181 (2016) [3] L. Pelliser, M. Manceau, C. Lethiec, D. Coursault, S. Vezzoli, G. Lemenager, L. Coolen, M. DeVittorio, F. Pisanello, L. Carbone, A. Maitre, A. Bramati, E. Lacaze, Alignement of Rod-Shaped Single Photon Emitters driven by Line Defects in Liquid Crystals, Adv. Funct. Mat. 25, 1719 (2015) [4] W. Geng, M. Manceau, N. Rahbany, V. Sallet, M. De Vittorio, L. Carbone, Q. Glorieux, A. Bramati, C. Couteau, Localised excitation of a single photon source by a nanowaveguide, Scientific Reports 6, 19721 (2016) [5] M. Joos, C. Ding, V. Loo, G. Blanquer, E. Giacobino, A. Bramati, V. Krachmalnikoff and Q. Glorieux, Polarization Control of Linear Dipole radiation using an Optical Nanofiber, Phys. Rev. Applied, 9, 064035 (2018)