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Optical theorem for advanced DDA formulations #148

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
Simple relation Cext=Cabs+Csca is automatically satisfied for default DDA 
formulation. However, it may get much more complicated for more advanced 
formulations, especially those that modify the interaction term between the 
dipoles. So this warrants a special study to test the current implementation of 
cross sections calculation in ADDA. Moreover, theoretical analysis is also 
required.

For instance, currently when using '-int igt_so' optical theorem is satisfied 
only up to O[(kd)^2].

Original issue reported on code.google.com by yurkin on 24 May 2012 at 9:00

GoogleCodeExporter commented 9 years ago 
Similar issues of different ways of calculating Csca (from internal fields or 
far-fields) are discussed in 
A.G. Hoekstra, M. Frijlink, L.B.F.M. Waters, and P.M.A. Sloot, “Radiation 
forces in the discrete-dipole approximation,” J. Opt. Soc. Am. A 18, 
1944–1953 (2001).

Original comment by yurkin on 26 Jun 2012 at 10:17

GoogleCodeExporter commented 9 years ago 
After issue 188 is addressed the optical theorem would not be exactly satisfied 
for '-scat fin' as well.

Original comment by yurkin on 4 Feb 2014 at 3:42