The use of a method known as the discrete dipole approximation (DDA) is shown to be possible in determining the desired spectroscopic information for small metal particles of arbitrary shape. The DDA has proved to be a powerful tool in studies of light scattering from nonmetallic dust particles of astrophysical interest. Specifically, it is shown here that the DDA extinction spectra and Raman enhancements converge with increasing dipole number for representative spheroidal and tetrahedral particles and for two coupled spheroids.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics