This tiny measure of energy equals ten to the negative fifteenth power joules. It is frequently used in photonics and semiconductor engineering to quantify the energy consumed by a single logic gate transition or the energy contained in an ultrashort laser pulse. Lowering the energy per bit into the low femtojoule regime is a major goal in designing energy-efficient computing hardware.
Heard on the job
The new optical interconnect operates at an efficiency of just two femtojoules per bit.