TY - JOUR
T1 - Extracting geometrical information of closely packed random media from multiply scattered light via a cross-correlation analysis
AU - Tseng, Snow H.
AU - Taflove, Allen
AU - Maitland, Duncan
AU - Backman, Vadim
AU - Walsh, Joseph T.
N1 - Funding Information:
Manuscript received October 7, 2005; revised January 10, 2006. This work was supported by National Institutes of Health (NIH) National Cancer Institute Contract under Grants 5R01-CA085991 and 5R01-HD044015, by the NIH under Grant R01 EB003682, by the National Science Foundation (NSF) under Grant BES-0238903, and by the the NSF TeraGrid Grant MCB040062N. This work was performed under the auspices of the U.S. Department of Energy under Contract W-7405-ENG-48.
PY - 2006
Y1 - 2006
N2 - We have implemented a two-dimensional (2-D) pseudospectral time-domain (PSTD) numerical solution of Maxwell's equations to calculate the total scattering cross-section (TSCS) spectrum of a macroscopic, closely packed, random medium consisting of dielectric cylinders. Results reported in this letter show that a TSCS spectral signature is identified, revealing structural information of the random medium. Furthermore, by means of the proposed cross-correlation analysis, the diameter of constituent cylinders within a closely packed cluster can be determined. On a broader perspective, based on first principles, our research findings may lead to a better understanding of the coherent interference effect of light scattering by closely packed random media. Specifically, we show that, microscopic structural information of the random medium can be determined from the forward, multiply scattered light, even for optically thick, closely packed random media, with scatterers spaced less than a single wavelength apart.
AB - We have implemented a two-dimensional (2-D) pseudospectral time-domain (PSTD) numerical solution of Maxwell's equations to calculate the total scattering cross-section (TSCS) spectrum of a macroscopic, closely packed, random medium consisting of dielectric cylinders. Results reported in this letter show that a TSCS spectral signature is identified, revealing structural information of the random medium. Furthermore, by means of the proposed cross-correlation analysis, the diameter of constituent cylinders within a closely packed cluster can be determined. On a broader perspective, based on first principles, our research findings may lead to a better understanding of the coherent interference effect of light scattering by closely packed random media. Specifically, we show that, microscopic structural information of the random medium can be determined from the forward, multiply scattered light, even for optically thick, closely packed random media, with scatterers spaced less than a single wavelength apart.
KW - Closely packed random media
KW - Cross-correlation
KW - Multiply scattered light
KW - Total scattering cross-section
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U2 - 10.1109/LAWP.2006.872432
DO - 10.1109/LAWP.2006.872432
M3 - Article
AN - SCOPUS:76149103136
SN - 1536-1225
VL - 5
SP - 91
EP - 94
JO - IEEE Antennas and Wireless Propagation Letters
JF - IEEE Antennas and Wireless Propagation Letters
IS - 1
M1 - 872432
ER -