Infra-red intersub-band absorption measurements were performed on p-type Ga0.47In0.53As/Al0.48In0.52As multiquantum wells using normally incident radiation. Several strong intersub-band absorption peaks were observed in the wavelength range 6·12 µm. The transition from the impurity bound state to the extended state was observed for the first time.
- Quantum optics
- Semiconductor materials
ASJC Scopus subject areas
- Electrical and Electronic Engineering