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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 19, Iss. 11 — Nov. 1, 2002
  • pp: 2722–2726

Multipolar interband absorption in a semiconductor quantum dot. II. Magnetic dipole enhancement

Jorge R. Zurita-Sánchez and Lukas Novotny  »View Author Affiliations

JOSA B, Vol. 19, Issue 11, pp. 2722-2726 (2002)

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We derive the magnetic dipole selection rules and the magnetic dipole absorption rate for a spherical semiconductor quantum dot. We find that electric dipole and magnetic dipole transitions are exclusive and therefore can be spectrally distinguished. The magnitudes of electric and magnetic absorption rates are compared for excitation with a strongly focused azimuthally polarized beam. It turns out that spatial optical resolution can be increased by detection of the ratio of magnetic and electric absorption rates. Resolution is limited only by the purity of the laser mode used for excitation.

© 2002 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(160.6000) Materials : Semiconductor materials
(300.6470) Spectroscopy : Spectroscopy, semiconductors

Jorge R. Zurita-Sánchez and Lukas Novotny, "Multipolar interband absorption in a semiconductor quantum dot. II. Magnetic dipole enhancement," J. Opt. Soc. Am. B 19, 2722-2726 (2002)

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  1. D. P. Craig and T. Thirunamachandran, Molecular Quantum Electrodynamics (Dover, Mineola, New York, 1998).
  2. J. R. Zurita-Sánchez and L. Novotny, “Multipolar interband absorption in a semiconductor. I. Electric quadrupole enhancement,” J. Opt. Soc. Am. B 19, 1355–1362 (2002). [CrossRef]
  3. B. Hanewinkel, A. Knorr, P. Thomas, and S. W. Koch, “Optical near-field response of semiconductor quantum dots,” Phys. Rev. B 55, 13715–13725 (1997). [CrossRef]
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  6. L. Novotny, M. R. Beversluis, K. S. Youngworth, and T. G. Brown, “Longitudinal field modes probed by single molecules,” Phys. Rev. Lett. 86, 5251–5254 (2001). [CrossRef] [PubMed]

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