Acta Physica Academiae Scientiarum Hungaricae
Negative absorption coefficient at indirect transitions in semiconductors
Nikolai G. Basov, Oleg N Krokhin, J. M. Popov
Acta Physica Academiae Scientiarum Hungaricae
Nikolai G. Basov, Oleg N Krokhin, J. M. Popov