Sun, 08 Jun 2025 21:42:15 +0000

Researchers demonstrate ultrafast quantum tunnelling currents in graphene phototransistors using attosecond laser pulses. Achieving ON/OFF switching in just 630 attoseconds (~1.6 PHz), they control current via laser intensity and implement basic logic gates—all under ambient conditions. This paves the way for petahertz-speed lightwave electronics and optical quantum computing.