A. B. Young

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By performing a full analysis of the projected local density of states (LDOS) in a photonic crystal waveguide, we show that phase plays a crucial role in the symmetry of the light-matter interaction. By considering a quantum dot (QD) spin coupled to a photonic crystal waveguide (PCW) mode, we demonstrate that the light-matter interaction can be asymmetric,(More)
We show the importance of polarization and phase engineering when designing quantum information devices. Using the example of a photonic-crystal waveguide we demonstrate, for the first time, designs for an integrated quantum dot spin-photon interface.
To illustrate the loss problem I take the example of quantum metrology where for interferometric measurement of an optical phase θ, the fundamental limit or the standard quantum limit (SQL) Δθ ≥ 1/√n where n is the number of photons detected. In theory using entangled photons it is possible to beat the SQL and achieve the(More)
Semiconductor quantum dots are often proposed as an ideal means to achieve non-linear interactions and photon switching in semiconductor integrated circuits. We examine here the use of the electron spin degree of freedom as a means to achieve a controllable quantum switching of single photons and trains of photons. We examine some types of spin-based(More)
We study the polarisation structure of the electromagnetic fields in the vicinity of a photonic crystal waveguide, and demonstrate that polarisation singularities are supported. Further, we study the effects of disorder and find that the polarisation singularities persist far beyond expected levels of disorder in a real waveguide, making them suitable for(More)
Photonic crystal waveguides can support polarisation singularities, which are predicted to be useful in future quantum information applications. For example, C-points possess local chirality, allowing spin-photon entanglement when a quantum dot is placed at its location. Photonic crystal waveguides also support slow-light modes, and we have studied the(More)
Quantum dots (QDs) can be incorporated into solid state photonic devices such as cavities or waveguides that enhance the light-matter interaction. A near unit efficiency light-matter interaction is essential for deterministic, scalable quantum information devices [1]. In this limit, a single photon input into the device will undergo a large rotation of the(More)