The motion of charge carriers in a superlattice is different from that in the individual layers : mobility of charge carriers can be enhanced and specific optical properties are used in semiconductor lasers .
Mobility of charge carriers can be enhanced is beneficial for high - frequency devices .
The motion of charge carriers in a superlattice is different from that in the individual layers : mobility of charge carriers can be enhanced , which is beneficial for high - frequency devices , and specific optical properties are used in semiconductor lasers .