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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 25 — Dec. 6, 2010
  • pp: 26206–26213

Quantitative determination of the charge carrier concentration of ion implanted silicon by IR-near-field spectroscopy

Rainer Jacob, Stephan Winnerl, Harald Schneider, Manfred Helm, Marc Tobias Wenzel, Hans-Georg von Ribbeck, Lukas M. Eng, and Susanne C. Kehr  »View Author Affiliations


Optics Express, Vol. 18, Issue 25, pp. 26206-26213 (2010)
http://dx.doi.org/10.1364/OE.18.026206


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Abstract

We use a combination of a scattering-type near-field infrared microscope with a free-electron laser as an intense, tunable radiation source to spatially and spectrally resolve buried doped layers in silicon. To this end, boron implanted stripes in silicon are raster scanned at different wavelengths in the range from 10 to 14 µm. An analysis based on a simple Drude model for the dielectric function of the sample yields quantitatively correct values for the concentration of the activated carriers. In a control experiment at the fixed wavelength of 10.6 µm, interferometric near-field signals are recorded. The phase information gained in this experiment is fully consistent with the carrier concentration obtained in the spectrally resolved experiments.

© 2010 OSA

OCIS Codes
(160.6000) Materials : Semiconductor materials
(260.3060) Physical optics : Infrared
(300.0300) Spectroscopy : Spectroscopy
(180.4243) Microscopy : Near-field microscopy

ToC Category:
Spectroscopy

History
Original Manuscript: September 8, 2010
Revised Manuscript: October 20, 2010
Manuscript Accepted: October 20, 2010
Published: December 1, 2010

Citation
Rainer Jacob, Stephan Winnerl, Harald Schneider, Manfred Helm, Marc Tobias Wenzel, Hans-Georg von Ribbeck, Lukas M. Eng, and Susanne C. Kehr, "Quantitative determination of the charge carrier concentration of ion implanted silicon by IR-near-field spectroscopy," Opt. Express 18, 26206-26213 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-25-26206


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