Sphere: Coherent Goniometer

Importing the package dependencies: numpy, PyMieSim

import numpy
from PyMieSim.experiment.detector import CoherentMode
from PyMieSim.experiment.scatterer import Sphere
from PyMieSim.experiment.source import Gaussian
from PyMieSim.experiment import Setup
from PyOptik import Material
from PyMieSim.units import nanometer, degree, watt, AU, RIU

Defining the source to be employed.

source = Gaussian(
    wavelength=1200 * nanometer,
    polarization=90 * degree,
    optical_power=1e-3 * watt,
    NA=0.2 * AU
)

Defining the ranging parameters for the scatterer distribution

scatterer = Sphere(
    diameter=2000 * nanometer,
    property=Material.BK7,
    medium_property=1 * RIU,
    source=source
)

Defining the detector to be employed.

detector = CoherentMode(
    mode_number='LP11',
    NA=[0.5, 0.3, 0.1, 0.05] * AU,
    phi_offset=numpy.linspace(-180, 180, 300) * degree,
    gamma_offset=0 * degree,
    sampling=400 * AU,
    polarization_filter=10 * degree,
    rotation=0 * degree,  # Rotation of the mode field
)

Defining the experiment setup

experiment = Setup(scatterer=scatterer, source=source, detector=detector)

/opt/hostedtoolcache/Python/3.11.13/x64/lib/python3.11/site-packages/PyOptik/material/base_class.py:60: UserWarning: Wavelength range goes from 1.2000000000000002 µm to 1.2000000000000002 µm which is outside the allowable range of 5.0 µm to 33.333 µm µm. [Material: BK7]
  warnings.warn(

Measuring the properties

dataframe = experiment.get('coupling')

# # %%
# # Plotting the results
dataframe.plot(x="detector:phi_offset")

<Axes: xlabel='detector:phi_offset', ylabel='watt'>