Quantum Optics Seminar: Daniel Bedialauneta Rodríguez
Efficient off-chip coupling interface of alligator photonic crystal cavities for the V2 color center in 4H-SiC
Point defects in 4H-silicon carbide have shown themselves to be an interesting candidate for scalable quantum applications. Especially due to their outstanding spin-optical properties [1,2] and the successful integration of defects in nanophotonic structures [3,4]. In widely available c-plane grown silicon carbide, V2 defects couple primarily to TM-like modes. Here, we design an adiabatic coupling interface between a single-sided optical fiber taper and a silicon carbide waveguide taper, and the waveguide-to-cavity interface, for a high off-chip collection efficiency of the TM-mode-like emission of the V2 defect. Additionally, we build a room temperature setup that implements these designs for the characterization alligator photonic crystal cavities and collection efficiency of the system.