An electro-optic device may include a substrate layer, and a first photonic layer over the substrate layer and having a first photonic device. The electro-optic device may include a second photonic layer over the first photonic layer and having a second photonic device. The electro-optic device may include a dielectric layer over the second photonic layer, and a first electrically conductive via extending through the dielectric layer and the second photonic layer to couple to the first photonic device, and a second electrically conductive via extending through the dielectric layer and coupling to the second photonic device. The electro-optic device may include a third electrically conductive via extending through the substrate layer, the second photonic layer, and the first photonic layer to couple to the substrate layer.