Emission-Frequency Separated High Quality Single-Photon Sources Enabled by Phonons

High Frequency Elastic Wave Emission Caused by a Single Elastohydrodynamically Lubricated Contact Fundamental sources and Principles

Elastohydrodynamically lubricated (EHL) contacts are fundamental for several rotating machine elements. For example gears, rolling element bearings and lubricated chain drives work due to the principle of EHL. All of these machine elements require maintenance and, as condition based maintenance has increased in industry, the need for monitoring techniques has also increased. In order to avoid i...

Lifetimes of High Frequency Phonons

We discuss the inhibition of anharmonic spontaneous multiphonon decay by energymomentum conservation and the reduction of isotope scattering by the sharing of ionic motion to permit a frequency window for long-lived transverse acoustic phonons. l.~ntroduction Recent high frequency phonon experiments have revealed anomalously long phonon lifetimes at low temperatures.' Indeed, for phonons genera...

Single Photon Sources

Image Optimization in Single Photon Emission Computed Tomography by Hardware Modifications with Monte Carlo Simulation

Introduction: In Single Photon Emission Computed Tomography (SPECT), the projection data used for image reconstruction are distorted by several factors, including attenuation and scattering of gamma rays, collimator structure, data acquisition method, organ motion, and washout of radiopharmaceuticals. All these make reconstruction of a quantitative SPECT image very difficult. Simulation of a SP...

High performance single photon sources from photolithographically defined pillar microcavities.

We demonstrate that single photons can be generated from single InAs/GaAs quantum dots in photolithographically defined pillar microcavities. Pillars with a 1.9 microm diameter cavity show a four fold enhancement in the radiative decay rate due to the Purcell effect and a photon collection efficiency into a lens of up to 10%. Measurements of the second order correlation function reveal a greate...