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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 5 — May. 1, 2008
  • pp: 854–864

Refractive index, free carrier concentration, and mobility depth profiles of ion implanted Si: optical investigation using FTIR spectroscopy

Charalambos C. Katsidis  »View Author Affiliations


JOSA B, Vol. 25, Issue 5, pp. 854-864 (2008)
http://dx.doi.org/10.1364/JOSAB.25.000854


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Abstract

Fourier transform infrared (FTIR) spectroscopy combined with a computer code for optical analysis of multilayer structures is implemented in this study as a nondestructive depth profiling tool. High-energy ( 1.2 MeV ) P implanted Si is examined in the as-implanted state and after annealing at 950 ° C . Ion implantation led to the formation of a buried amorphous layer with transition regions that can be described by half-Gaussian segments. Annealing yielded a free carrier concentration profile that can be modeled by a Pearson distribution as confirmed by spreading resistance profilometry (SRP). The proposed optical analysis model incorporates mobility variation versus depth, and the validity of replacing the varying mobility with a constant average value in the analysis of FTIR data is tested.

© 2008 Optical Society of America

OCIS Codes
(080.2720) Geometric optics : Mathematical methods (general)
(160.6000) Materials : Semiconductor materials
(260.2030) Physical optics : Dispersion
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6470) Spectroscopy : Spectroscopy, semiconductors
(260.2710) Physical optics : Inhomogeneous optical media

ToC Category:
Spectroscopy

History
Original Manuscript: January 18, 2008
Revised Manuscript: March 10, 2008
Manuscript Accepted: March 10, 2008
Published: April 30, 2008

Citation
Charalambos C. Katsidis, "Refractive index, free carrier concentration, and mobility depth profiles of ion implanted Si: optical investigation using FTIR spectroscopy," J. Opt. Soc. Am. B 25, 854-864 (2008)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-25-5-854

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