Programmable Si photonic circuit hits 29 fW static power per pi phase shift
jwt0625 · x · 2026-09-23
Discussion of Akazawa 2026, "Ultralow-power, high-speed programmable Si photonic circuits with InGaAsP membrane":
- Static power of just 29 fW for a pi phase shift, at 600 µm device length
- The wiggling structures are TE-pass filters
- Devices are stealth diced, then facet polished
- Fabrication uses epi growth on InP wafers with direct wafer bonding
Such ultralow-power programmable photonic circuits could matter for future optical interconnect and compute infrastructure.
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