Particles
Particles¶
A particle is defined by its surface shape and the complex refractive index of its medium. In the case of a multilayered particle, each layer’s refractive index and surface shape should be defined.
Homogeneous particles¶
A homogeneous particle can be defined as an instance of the HomogeneousParticle. There are also several predefined classes for the most often used partiles.
| HomogeneousParticle(shape, params, m) | Class for homogeneous particles .. |
| Sphere(xv, m) | Homogeneous spherical particle .. |
| ProlateSpheroid(ab, xv, m) | Homogeneous prolate spheroidal particle .. |
| OblateSpheroid(ab, xv, m) | Homogeneous oblate spheroidal particle .. |
| ChebParticle(N, eps, xv, m) | Homogeneous Chebyshev particle |
Layered particles¶
A layered particle can be defined as an instance of the LayeredParticle. There are also several predefined classes for the most often used multilayered partiles.
| LayeredParticle(layers) | Class for layered particles |
| Layered_EqShape_Particle(shape0, params, ms, ...) | Layered particle whose layers have the same shapes, i.e. |
| Layered_EqShapeEqVol_Particle(shape0, ...) | Layered particle whose layers have the same shapes, i.e. |
| LayeredConfocalSpheroid(ab, xv, ms, volumes, ...) |
Effective Medium Theory¶
Inhomogeneous scatterers can also be treated with the effective medium theory (EMT). An EMT particle is an instance of a class derrivered from the EMT_Particle. There are several classes implementing EMT with the most widely used EMT rules.
| EMT_Particle(shape0, params, ms, volumes) | Particle using effective medium theory, an approximation of inhomogeneous particles with homogeneous one having averaged complex refrecive index m. |
| EMT_MGarn_Particle(shape0, params, ms, volumes) | Particle using Maxwell-Garnett effective medium theory, |
| EMT_IMGarn_Particle(shape0, params, ms, volumes) | Particle using inverse Maxwell-Garnett effective medium theory, |
| EMT_Brugg_Particle(shape0, params, ms, volumes) | Particle using Bruggeman effective medium theory, |