Single Module#

The Single module in PyMieSim is designed for simulating light scattering by individual particles. It provides tools for defining single scatterers, their sources, and detectors, offering a detailed analysis of optical properties at the level of a single interaction. This module is ideal for researchers and engineers interested in exploring the scattering behavior of individual particles in isolation.

Key Components#

Sources: The single module offers several types of sources to illuminate the scatterer. These sources can be configured to match specific experimental conditions, such as wavelength, polarization, and propagation direction.
- planewave: Simulates a plane wave source, a uniform beam commonly used in scattering studies.
- gaussian: Simulates a Gaussian beam, useful for focused light interactions with scatterers.
Scatterers: Defines the individual particles being studied. PyMieSim supports various geometries such as spheres, cylinders, and core-shell structures, allowing for the investigation of how shape, size, and material composition affect scattering properties.
- sphere: A single spherical particle, modeled using Mie theory.
- cylinder: A cylindrical scatterer, ideal for elongated particles like fibers.
- core_shell: Defines a layered particle with different materials in the core and shell, enabling studies of multi-material systems.
Detectors: Detectors capture the scattered light from the single scatterer. Various detector types are available, each offering different capabilities for measuring the properties of scattered light.
- photodiode: A simple detector for measuring intensity.
- coherent: Captures the coherence properties of the scattered field, providing insights into phase and amplitude relationships.
- uncoherent: Measures intensity without regard to phase information.
Single Scatterer Setup: The module allows for a flexible combination of source, scatterer, and detector, offering detailed simulations of how light interacts with individual particles. You can explore a wide range of properties, such as scattering cross-sections, phase functions, polarization effects, and more.

Example configurations include: - A spherical scatterer illuminated by a Gaussian beam with intensity measurements at various angles. - Core-shell particles analyzed for extinction cross-sections as a function of shell thickness. - Cylindrical scatterers examined for scattering efficiencies across different wavelengths.

Example Usage#

Below is an example of how to set up and run a simulation using the single module in PyMieSim:

from PyMieSim.single.scatterer import Sphere
from PyMieSim.single.source import Gaussian
from PyMieSim.single.detector import Photodiode
from PyMieSim.units import nanometer, degree, watt, AU, RIU

source = Gaussian(
    wavelength=450 * nanometer,
    polarization=0 * degree,
    optical_power=1 * watt,
    NA=0.3 * AU
)

scatterer = Sphere(
    diameter=6 * nanometer,  # 6 nm
    source=source,
    medium_property=1.0 * RIU,
    property=1.4 * RIU
)

detector = Photodiode(
    NA=0.1 * AU,
    phi_offset=0 * degree,
    gamma_offset=0 * degree,
    sampling=200 * AU,
    polarization_filter=None
)

coupling = detector.coupling(scatterer)

print(coupling)

The Single module simplifies the process of analyzing light scattering at the individual particle level, providing an intuitive interface for exploring the interaction between light and single particles.