Final PhD Presentation

Integrated Quantum Photonics using Rare-Earth Ion doped Planar Waveguides

The unique spectral properties of rare earth ion doped crystals are a good motivation for studying them as a suitable quantum system for storing and manipulating light carrying quantum information. For manufacturing and engineering purposes, it is important to study the integration of these structures onto compact planar waveguide devices. It is essential to investigate whether the distinctive properties of rare earths are preserved when moved towards smaller scale devices.

I’ll report the measurement of the inhomogeneous linewidth, homogeneous linewidth and spin state lifetime of Pr³⁺ ions in a novel waveguide architecture. The TeO₂ slab waveguide deposited on a bulk Pr³⁺:Y₂SiO₅ crystal allows the ³H₄à ¹D₂transition of Pr³⁺ ions to be probed by the optical evanescent field that extends into the substrate. The obtained coherent properties indicate that the properties of ions interacting with the waveguide mode are consistent with those of bulk ions. This result establishes the foundation for large, integrated and high performance rare earth ion quantum systems based on a waveguide platform.

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