title: Diamagnetic response of exciton complexes in semiconductor quantum dots.
abstract: We report measurements of diamagnetic shifts for different exciton complexes confined in small InAs quantum dots. The measured diamagnetic responses are sensitive to the number of carriers in the exciton complexes, with systematic differences between neutral excitons, biexcitons, and trions. Theoretical calculations suggest that such systematic differences arise from very different extents of electron and hole wave functions confined in small quantum dots. The measured magnetic response of Coulomb energies is found to vary with the cube of the wave function extent, and can be a sensitive probe to the electron-hole wave function asymmetry.
authors.affiliation: Department of Electronic Engineering, National Chiao Tung University, Hsinchu, 300 Taiwan.
authors.forename: Ming-Fu
authors.initials: MF
authors.lastname: Tsai
authors.forename: Hsuan
authors.initials: H
authors.lastname: Lin
authors.forename: Chia-Hsien
authors.initials: CH
authors.lastname: Lin
authors.forename: Sheng-Di
authors.initials: SD
authors.lastname: Lin
authors.forename: Sheng-Yun
authors.initials: SY
authors.lastname: Wang
authors.forename: Ming-Cheng
authors.initials: MC
authors.lastname: Lo
authors.forename: Shun-Jen
authors.initials: SJ
authors.lastname: Cheng
authors.forename: Ming-Chih
authors.initials: MC
authors.lastname: Lee
authors.forename: Wen-Hao
authors.initials: WH
authors.lastname: Chang