Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2003/10/01 Vol. E86-CNo. 10pp. 2015-2021 Type of Manuscript: Special Section PAPER (Special Issue on Heterostructure Microelectronics with TWHM2003) Category: Keyword: GaAs/AlGaAs heterostructures, photoreflectance, Franz-Keldysh oscillations,