Summary
This project develops new sources of light that utilize quantum entanglement to enhance imaging resolution and detection. We aim to go beyond simple photon pairs and advance our understanding and control of new quantum states of light. Our approach uses deterministic single-photon subtraction (removing of a specific photon from a pulse of light) implemented with three-level solid-state quantum emitters, such as quantum dots and colour centers in diamond, coupled to chiral waveguides. In this type of waveguide, light propagation direction is determined by light’s polarization. Our goal is to cascade multiple photon subtraction stages on a chip-scale device and explore deterministic photon subtraction as a tool for engineering quantum states of light for improved resolution of optical microscopy and long range optical sensing.
Figure 1. A three-level quantum emitter with circularly polarized transitions between its ground and excited states is strongly coupled to a chiral waveguide to form a device that can deterministically subtract single photon from input light. This can be used to generate highly non-classical states from, e.g., squeezed coherent states.
Related Content
Entangled Photon Orbital Angular Momentum Arrays
Summary Arrays of orbital angular momentum (OAM) states of light are a new form of structured light so far relatively unexplored in quantum information science. Unlike spin angular momentum of light, which is related to light’s polarization and covers two dimensions, OAM states, sometimes described as ‘donut beams’ due to the shape of the field […]
September 19, 2019
Mesoscopic systems as coherent control elements
Summary Mesoscopic systems provide a new tool for quantum systems design. In particular, they are enabling of robust quantum control. Here “mesoscopic system” refers to a connected network where each element, if studied alone, would be a quantum bit. The network is too big to be treated fully quantum mechanically. We do not have individual […]
September 1, 2016
Free-space Polarization-selective Microcavity based on Chiral Metasurfaces
Summary Developing a new type of Fabry-Pérot cavity that allows improved control of the atoms’ emission into the cavity mode will result in enhancement of the efficiency and fidelity of quantum state transfer from photons to atoms and back. This in turn can be used to improve the performance of quantum networks and repeaters, as […]
September 19, 2019
Two-Dimensional Quantum Materials and Heterostructures
Two-dimensional (2D) layers just one atom thick can be stripped from certain materials, such as graphene.
June 1, 2017