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Title: Bi donor hyperfine state populations studied by optical transitions of donor bound excitons in enriched {sup 28}Si

We report on the first optical studies of Bi donor bound excitons in {sup 28}Si, using absorption rather than emission spectroscopy, and a new noncontact photoconductivity method which has much higher sensitivity and spectral resolution than photoluminescence spectroscopy. Individual hyperfine components of this potential semiconductor qubit can be resolved under an applied magnetic field, and we find that strong nonresonant optical hyperpolarization towards both the I{sub z} = +9/2 and −9/2 hyperfine states can be observed, depending on the intensity of the above-gap excitation.
Authors:
; ;  [1] ; ;  [2] ;  [3] ;  [4]
  1. Department of Physics, Simon Fraser University, Burnaby, BC V5A 1S6 (Canada)
  2. Leibniz-Institut für Kristallzüchtung, 12489 Berlin (Germany)
  3. PTB Braunschweig, 38116 Braunschweig (Germany)
  4. Vitcon Projectconsult GmbH, 07745 Jena (Germany)
Publication Date:
OSTI Identifier:
22261936
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1566; Journal Issue: 1; Conference: ICPS 2012: 31. international conference on the physics of semiconductors, Zurich (Switzerland), 29 Jul - 3 Aug 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; EMISSION SPECTROSCOPY; EXCITONS; MAGNETIC FIELDS; PHOTOCONDUCTIVITY; PHOTOLUMINESCENCE; SEMICONDUCTOR MATERIALS; SENSITIVITY; SILICON 28