Spherical scatterer

 from LightWave2D.grid import Grid
 from LightWave2D.experiment import Experiment
 from MPSPlots import colormaps
 from TypedUnit import ureg

 grid = Grid(
     resolution=0.1 * ureg.micrometer,
     size_x=32 * ureg.micrometer,
     size_y=20 * ureg.micrometer,
     n_steps=300
 )

experiment = Experiment(grid=grid)

 scatterer = experiment.add_circle(
     position=('30%', '50%'),
     epsilon_r=2,
     radius=3 * ureg.micrometer
 )

 source = experiment.add_line_source(
     wavelength=1550 * ureg.nanometer,
     position_0=('10%', '100%'),
     position_1=('10%', '0%'),
     amplitude=10,
 )

experiment.add_pml(order=1, width="10%", sigma_max=5000 * ureg.siemens / ureg.meter)

experiment.run()

animation = experiment.render_propagation(
    skip_frame=5,
    colormap=colormaps.polytechnique.red_black_blue
)

animation.save('./spherical_scatterer.gif', writer='Pillow', fps=10)

Ring resonator

from LightWave2D.grid import Grid
from LightWave2D.experiment import Experiment
from MPSPlots.colormaps import polytechnique
from TypedUnit import ureg

 grid = Grid(
     resolution=0.1 * ureg.micrometer,
     size_x=50 * ureg.micrometer,
     size_y=30 * ureg.micrometer,
     n_steps=800
 )

experiment = Experiment(grid=grid)


 scatterer = experiment.add_ring_resonator(
     position=('35%', '50%'),
     epsilon_r=1.5,
     inner_radius=4 * ureg.micrometer,
     width=2 * ureg.micrometer
 )

 source = experiment.add_point_source(
     wavelength=1550 * ureg.nanometer,
     position=('25%', '50%'),
     amplitude=100,
 )

experiment.add_pml(order=1, width="10%", sigma_max=5000 * ureg.siemens / ureg.meter)

experiment.run()

animation = experiment.render_propagation(skip_frame=5, colormap=polytechnique.red_black_blue)

animation.save('./resonator.gif', writer='Pillow', fps=10)

Lens

from LightWave2D.grid import Grid
from LightWave2D.experiment import Experiment
from MPSPlots import colormaps
from TypedUnit import ureg

 grid = Grid(
     resolution=0.1 * ureg.micrometer,
     size_x=60 * ureg.micrometer,
     size_y=30 * ureg.micrometer,
     n_steps=1200
 )

experiment = Experiment(grid=grid)

 scatterer = experiment.add_lens(
     position=('35%', '50%'),
     epsilon_r=2,
     curvature=10 * ureg.micrometer,
     width=5 * ureg.micrometer
 )

 source = experiment.add_point_source(
     wavelength=1550 * ureg.nanometer,
     position=('10%', '50%'),
     amplitude=10,
 )


experiment.add_pml(order=1, width="10%", sigma_max=5000 * ureg.siemens / ureg.meter)

experiment.run()

experiment.plot_frame(
    frame_number=-1,
    enhance_contrast=5,
    colormap=colormaps.polytechnique.red_black_blue
)

animation = experiment.render_propagation(
    skip_frame=5,
    colormap=colormaps.polytechnique.red_black_blue
)

animation.save('./lens.gif', writer='Pillow', fps=10)

Plenty of other examples are available online, I invite you to check the examples section of the documentation.