Extended Data Fig. 1: Plan view of one of the grating couplers superimposed on the trap electrode metal (partial). | Nature

Extended Data Fig. 1: Plan view of one of the grating couplers superimposed on the trap electrode metal (partial).

From: Integrated multi-wavelength control of an ion qubit

Extended Data Fig. 1

The single-mode (SM) waveguide is tapered to provide a wider beam at the grating coupler. The grating teeth are formed via a partial etch into the waveguide material beneath a window in the electrode metal. The gratings used are forward-emitting, designed to emit a beam to the ion location as depicted, but 55 μm above the surface of the metal.

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