negative effective mass amplifiers and generators

negative effective mass amplifiers and generators

[′neg·əd·iv i¦fek·tiv ¦mas ′am·plə‚fī·ərz ən ′jen·ə‚rād·ərz] (electronics) Class of solid-state devices for broad-band amplification and generation of electrical waves in the microwave region; these devices use the property of the effective masses of charge carriers in semiconductors becoming negative with sufficiently high kinetic energies.