Fig. 1: Device design.
From: Controlling single rare earth ion emission in an electro-optical nanocavity
a Schematic drawing of our device (not to scale). Periodic holes are patterned on a suspended ridge waveguide to form photonic crystal mirror. Gold electrodes are deposited along the waveguide for electro-optic frequency tuning. Erbium (Er) ions are uniformly distributed in lithium niobate (LN). Ions in the photonic cavity can be addressed by collecting fluorescence. b Cavity design principle. The lattice constant is tapered down in the middle to support a defect mode and on one side for coupling. c Finite element simulation of resonance mode profile (fundamental TE). d False color SEM images of the actual device, with a zoom-in view on the waveguide. The grating coupler for fiber-to-chip coupling is also shown.
