Single-Aperture Dual-Color Ion Addressing with a DUV-Compatible Bilayer Grating
Summary
arXiv:2607.23529v1 Announce Type: new Abstract: Multi-wavelength optical control is a scaling bottleneck for trapped-ion hardware: separate surface emitters consume trap area, interrupt the electrode plane, and expose charge-sensitive dielectric near the ions. Here, a vertically stacked silicon-nitride bilayer routes the $^{40}\text{Ca}^+$ qubit and repump fields-729.4 and 854.2 nm-through one electrode aperture and focuses them $70~\mu\text{m}$ above the chip. Three-dimensional FDTDX predicts $0.10~\mu\text{m}$ color separation and near-diffraction-limited spots along the ion-chain axis.
Why It Matters
This Semiconductors development reshapes the global chip supply chain and the race for advanced-node leadership. For Taiwan, it is a signal worth tracking: it shapes who supplies, who scales, and who sets the standard over the next five years.
Key Facts
- SectorSemiconductors
- MarketTaiwan
- ImpactMedium (50/100)
- SignalResearch