A Tunable Waveguide-Coupled Cavity Design for Efficient Spin-Photon Interfaces in Photonic Integrated Circuits

Abstract

A solid state emitter coupled to a photonic crystal cavity exhibits increased photon emission into a single frequency mode. However, current designs for photonic crystal cavities coupled to quantum emitters have three main problems: emitters are placed near surfaces that can degrade their optical properties, the cavity fluorescence cannot be collected into a single useful mode for further routing, and post-fabrication tuning is not currently possible in a stable and reversible manner for each node individually. In this paper, we introduce a hybrid cavity design with minimal fabrication of the host material that keeps the emitter $\ge 100$nm from all surfaces. This cavity has an unloaded quality factor ($Q$) larger than $1\times 10^6$ and a loaded $Q$ of $5.5\times 10^4$ with more than 75% of the emission coupled directly into an underlying photonic integrated circuit built from a convenient material that provides low loss waveguides. Finally this design can be actively and reversibly tuned onto resonance with the emitter, allowing tuning over more than 10 times the cavity linewidth while maintaining $\ge 50$% of the $Q$ factor with no effects to other cavities on the same chip.

arXiv comment5 pages, 3 figures

References in corpus (18)

• Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
• Near optimal single photon sources in the solid state
• Heralded entanglement between solid-state qubits separated by 3 meters
• Single-Photon Switching and Entanglement of Solid-State Qubits in an Integrated Nanophotonic System
• Solid-state electronic spin coherence time approaching one second
• Unconditional quantum teleportation between distant solid-state qubits
• Resonant enhancement of the zero-phonon emission from a color center in a diamond cavity
• Coupling of Nitrogen-Vacancy Centers to Photonic Crystal Cavities in Monocrystalline Diamond
• Deterministic coupling of a single nitrogen vacancy center to a photonic crystal cavity
• Stark shift control of single optical centers in diamond
• Low temperature studies of the excited-state structure of Nitrogen-Vacancy color centers in diamond
• Enhancement of the Zero Phonon Line emission from a Single NV-Center in a Nanodiamond via Coupling to a Photonic Crystal Cavity
• Non-reciprocal nonlinear optic induced transparency and frequency conversion on a chip
• Coherent spin control of a nanocavity-enhanced qubit in diamond
• Deterministic coupling of a single silicon-vacancy color center to a photonic crystal cavity in diamond
• Ultra Fast Nonlinear Optical Tuning of Photonic Crystal Cavities
• Cavity piezomechanical strong coupling and frequency conversion on an aluminum nitride chip
• Fabrication of Triangular Nanobeam Waveguide Networks in Bulk diamond Using Single-Crystal Silicon Hard Masks