title: Optical detection and ionization of donors in specific electronic and nuclear spin States.
abstract: We resolve the remarkably sharp bound exciton transitions of highly enriched 28Si using a single-frequency laser and photoluminescence excitation spectroscopy, as well as photocurrent spectroscopy. Well-resolved doublets in the spectrum of the 31P donor reflect the hyperfine coupling of the electronic and nuclear donor spins. The optical detection of the nuclear spin state, and selective pumping and ionization of donors in specific electronic and nuclear spin states, suggests a number of new possibilities which could be useful for the realization of silicon-based quantum computers.
authors.affiliation: Department of Physics, Simon Fraser University, Burnaby, British Columbia, V5A 1S6 Canada.
authors.forename: A
authors.initials: A
authors.lastname: Yang
authors.forename: M
authors.initials: M
authors.lastname: Steger
authors.forename: D
authors.initials: D
authors.lastname: Karaiskaj
authors.forename: M L W
authors.initials: ML
authors.lastname: Thewalt
authors.forename: M
authors.initials: M
authors.lastname: Cardona
authors.forename: K M
authors.initials: KM
authors.lastname: Itoh
authors.forename: H
authors.initials: H
authors.lastname: Riemann
authors.forename: N V
authors.initials: NV
authors.lastname: Abrosimov
authors.forename: M F
authors.initials: MF
authors.lastname: Churbanov
authors.forename: A V
authors.initials: AV
authors.lastname: Gusev
authors.forename: A D
authors.initials: AD
authors.lastname: Bulanov
authors.forename: A K
authors.initials: AK
authors.lastname: Kaliteevskii
authors.forename: O N
authors.initials: ON
authors.lastname: Godisov
authors.forename: P
authors.initials: P
authors.lastname: Becker
authors.forename: H-J
authors.initials: HJ
authors.lastname: Pohl
authors.forename: J W
authors.initials: JW
authors.lastname: Ager
authors.forename: E E
authors.initials: EE
authors.lastname: Haller