Coherence Properties of Rare-Earth Spins in Micrometer-Thin Films

Abstract

Rare-earth ions in bulk crystals are excellent solid-state quantum systems in quantum information science, owing to the exceptional optical and spin coherence properties. However, the weak fluorescence of single rare-earth ions present a significant challenge for scalability, necessitating the integration into micro-cavities. Thin films serve as a promising material platform for the integration, yet the fabrication without compromising the properties of the materials and rare-earth ions remains challenging. In this work, we fabricate micrometer-thin yttrium aluminum garnet (YAG) films from bulk crystals using ion implantation techniques. The resulting films preserve the single-crystalline structure of the original bulk crystal. Notably, the embedded rare-earth ions are photo-stable and exhibit bulk-like spin coherence properties. Our results demonstrate the compatibility of bulk-like spin properties with the thin-film fabrication technique, facilitating the efficient integration of rare-earth ions into on-chip photonic devices and advancing the applications of rare-earth ions systems in quantum technologies.

References in corpus (20)

• Multimode quantum memory based on atomic frequency combs
• Broadband waveguide quantum memory for entangled photons
• Spectral multiplexing for scalable quantum photonics using an atomic frequency comb quantum memory and feed-forward control
• Isolating and enhancing the emission of single erbium ions using a silicon nanophotonic cavity
• Telecom-heralded entanglement between remote multimode solid-state quantum memories
• Coherent control and single-shot readout of a rare-earth ion embedded in a nanophotonic cavity
• Heralded entanglement distribution between two absorptive quantum memories
• One-hour coherent optical storage in an atomic frequency comb memory
• Coherent properties of single rare-earth spin qubits
• Optically addressing single rare-earth ions in a nanophotonic cavity
• Parallel single-shot measurement and coherent control of solid-state spins below the diffraction limit
• An Integrated Photonic Platform for Rare-Earth Ions in Thin Film Lithium Niobate
• Cavity-enhanced quantum network nodes
• Mapping spin coherence of a single rare-earth ion in a crystal onto a single photon polarization state
• Controlling single rare earth ion emission in an electro-optical nanocavity
• Tunable and Transferable Diamond Membranes for Integrated Quantum Technologies
• Coherent and Purcell-enhanced emission from erbium dopants in a cryogenic high-Q resonator
• Spectral multiplexing of telecom emitters with stable transition frequency
• Bullseye dielectric cavities for photon collection from a surface-mounted quantum-light-emitter
• Spectral Multiplexing of Rare-earth Emitters in a Co-doped Crystalline Membrane