Single-frequency laser spectroscopy of the boron bound exciton in S 28 i

A. Yang,1 M. Steger,1 T. Sekiguchi,1 D. Karaiskaj,1 M. L. W. Thewalt,1 M. Cardona,2 K. M. Itoh,3 H. Riemann,4 N. V. Abrosimov,4 M. F. Churbanov,5 A. V. Gusev,5 A. D. Bulanov,5 I. D. Kovalev,5 A. K. Kaliteevskii,6 O. N. Godisov,6 P. Becker,7 H.-J. Pohl,8 J. W. Ager III,9 and E. E. Haller9 1Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6 2Max-Planck-Institut fur Festkorperforschung, 70569 Stuttgart, Germany 3Keio University and CREST–JST, Yokohama 223-8522, Japan 4Institute for Crystal Growth (IKZ), 12489 Berlin, Germany 5IChHPS, RAS, 603000 Nizhny Novgorod, Russia 6Science and Technical Center “Centrotech,” 198096 St. Petersburg, Russia 7Physikalisch-Teknische Bundestanstalt Braunschweig, 38116 Braunschweig, Germany 8VITCON Projectconsult GmbH, 07743 Jena, Germany 9University of California–Berkeley and LBNL, Berkeley, California 94720, USA Received 18 August 2009; revised manuscript received 11 September 2009; published 11 November 2009