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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 5 — Mar. 1, 2010
  • pp: 631–633

Using modified Kramers–Kronig relations to test transmission spectra of porous media in THz-TDS

H. Tuononen, E. Gornov, J. A. Zeitler, J. Aaltonen, and K.-E. Peiponen  »View Author Affiliations


Optics Letters, Vol. 35, Issue 5, pp. 631-633 (2010)
http://dx.doi.org/10.1364/OL.35.000631


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Abstract

We show that modified Kramers–Kronig relations provide a useful tool to test the validity of the complex refractive index extracted from transmission terahertz spectra of porous matrices containing pharmaceutical materials. The role of scattering of terahertz radiation is qualitatively considered as a reason for the observed discrepancy between experimental data and the values extracted from the inverted complex refractive index. As an example we present an analysis of the terahertz spectra of carbamazepine and lactose α-monohydrate.

© 2010 Optical Society of America

OCIS Codes
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(120.4800) Instrumentation, measurement, and metrology : Optical standards and testing
(300.6270) Spectroscopy : Spectroscopy, far infrared

ToC Category:
Spectroscopy

History
Original Manuscript: November 23, 2009
Manuscript Accepted: January 5, 2010
Published: February 19, 2010

Virtual Issues
Vol. 5, Iss. 6 Virtual Journal for Biomedical Optics

Citation
H. Tuononen, E. Gornov, J. A. Zeitler, J. Aaltonen, and K.-E. Peiponen, "Using modified Kramers–Kronig relations to test transmission spectra of porous media in THz-TDS," Opt. Lett. 35, 631-633 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-5-631


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References

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