CYCLOTRON-RESONANCE OF MAGNETOPOLARONS IN A PARABOLIC QUANTUM-DOT IN STRONG MAGNETIC-FIELDS

Cyclotron resonance of magnetopolarons in a parabolic quantum dot with a strong magnetic field normal to the plane of the quantum dot is inv estigated theoretically. It is shown that for a strong magnetic field (omega(c) >> omega(LO)), the cyclotron mass in a parabolic quantum dot is split into two cyclotron masses (m+ and m-*). One (m+*) is lower than the bare band mass, but increases with increasing effective confi nement length of the quantum dot, and approaches that of the two-dimen sional case. The other (m-) is greater than the bare band mass and mi ght be a measurable effect for small quantum dots.