INTERBAND MAGNETOABSORPTION IN NARROW-GAP HGTE CDTE SUPERLATTICE STRUCTURES/

The use of a magnetic field for interband absorption experiments in th e midinfrared regime can reveal the electronic band structure of HgTe/ CdTe superlattices. In high-quality samples pronounced magnetic field- induced absorption peaks are observed in the transmission spectra due to hole to electron Landau level transitions. By extrapolating the exc itation energies for such transitions to B = 0, gap energies between s everal hole and electron subbands can be determined accurately. In add ition, we show that interband magnetoabsorption provides a sensitive f eedback for growth of quantum structures.