Form and intrinsic optical activity in light scattering by chiral particles
The effect of intrinsic optical activity on the scattering matrix elements of a particle with macroscopic chirality (i.e., form chirality) is examined. An extension of the coupled dipole method is used in which the optical activity of the medium is included in the dipole moments of the subunits which are arranged to describe the chiral structure. The magnitude of the difference in refractive indices of the medium for left and right circularly polarized light chosen for the calculations is realistic for biological systems. The scattering matrix elements which are sensitive to form chirality are found to be significantly changed by intrinsic optical activity of this magnitude and the effect is more important when the chiral parameters become small compared with the wavelength of light. The intrinsic optical activity has a significant effect on the circular intensity differential scattering (CIDS) of a chiral structure at forward scattering angles. The form and intrinsic contributions to CIDS are found to be additive.
- Research Organization:
- Life Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6344441
- Journal Information:
- J. Chem. Phys.; (United States), Vol. 87:3
- Country of Publication:
- United States
- Language:
- English
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