Waveguide-coupled Nano-emitters For Non-linear And Quantum Optics

This thesis covers different subjects of nonlinear and quantum optics,studied in systems with scales smaller or comparable to the wavelength of interest.The manuscript is divided into two parts.The first part of the manuscript deals with several applications of optical nanofibers as a platform for light-matter interaction.In particular we will explore: the coupling between a dipole placed on the surface of the nanofiber;the coupling between two parallel nanofibers;as well as the mechanical properties of an optical nanofiber.The research on the coupling of linear dipoles on the surface of nanofibers aims to study the polarization characteristics of the dipoles coupled to the guiding mode of the fiber.Due to the chirality of the guiding mode of the nanofiber,we can detect the polarization properties of the dipole by monitoring the polarization at the fiber output.Full polarization including linear polarization,circular polarization and elliptical polarization are available through the coupling of dipole and optical nanofiber.Complete polarization control can be achieved by controlling the azimuth angle of the dipole and the orientation of the gold nanorod.The research on the coupling between two parallel optical nanofibers aims to build models to describe the photonic structures of nanofibers,including two different rings.This provides a reference for the construction of integrated optical devices（Sagnac interferometer and Fabry-Perot resonator）based on nanofibers.Finally,we combined the optical and mechanical properties of the nanofiber to achieve a displacement detection system with an accuracy of 1.2 nm/（Hz）^1/2.In the second part of the paper,we will focus on solving the problem of the limited photoluminescence quantum efficiency faced by single-photon emitters in the attenuation of photon transmission in optical fiber telecommunication networks.We use frequency conversion to convert the visible photons generated by the single-photon emitters to the low-loss telecommunication band photons transmitted in the optical fiber.Based on single-photon sources such as diamond color centers and CdSe-CdS quantum dots,we propose numerical simulations and possible experimental solutions for quantum frequency conversion.And we used laser to simulate the zero phonon line of the diamond nitrogen vacancy color center and realized efficient frequency down conversion.