- Updated the `_process_3d_pml` method to include depth in conductivity calculations.
- Added `get_conductivity` method in the PML class to compute conductivity based on 3D dimensions.
- Adjusted field calculations to use maximum sigma values to prevent double-counting.

- Enhanced the Monitor class to auto-detect plane normal and adjust size and position calculations accordingly.
- Improved grid slice retrieval in the Monitor class for better handling of 3D field data.
- Updated the 3D dipole verification benchmark to refine power calculations and monitor setup.
- Simplified the 3D Mie scattering benchmark by introducing a UniformSource class and optimizing monitor configurations for clarity and performance.

- Replaced UniformSource with GaussianBeamSource for improved wave propagation modeling.
- Enhanced field injection logic to incorporate Gaussian beam profile.
- Introduced DFT computation for frequency-domain analysis of scattered fields.
- Updated incident intensity calculations to reflect changes in source and monitor configurations.
- Improved benchmark output for clarity and accuracy in results.

…3D scenarios

- Updated ModeSource to store additional attributes for plotting, including resolution, grid shape, and 2D permittivity profile.
- Improved visualization logic in ModeSource for 2D mode profiles, including axis labeling and overlaying permittivity boundaries.
- Adjusted example script to position the source at the waveguide center and modified source width for better mode capture, changing polarization from "tm" to "te".

- Updated ModeSource to support injection of all 6 field components (Ex, Ey, Ez, Hx, Hy, Hz) for accurate 3D mode simulations.
- Improved initialization and setup methods to handle Yee grid staggering and proper field alignment.
- Enhanced visualization methods for 3D mode profiles, including plotting all field components.
- Refactored injection logic to accommodate both 2D and 3D scenarios, ensuring compatibility with legacy code paths.

- Enhanced the _setup_2d_injection method to utilize mode solver output directly, improving index-based extraction for E_mode and H_mode.
- Added detailed comments to clarify the order of field components based on propagation axis.
- Implemented phase alignment and impedance correction for both TM and TE modes, ensuring accurate profile calculations.
- Streamlined the extraction logic for 2D and 3D scenarios, maintaining compatibility with legacy code paths.

- Updated Monitor class to extract plane_position from start coordinates if not explicitly provided, enhancing flexibility in monitor setup.
- Added visualization method to GaussianSource for 2D plotting, allowing representation of the source position and width with circles.
- Introduced visualization method in ModeSource for 2D plotting, depicting the source position and direction with lines and arrows.
- Adjusted example script to include visualization calls for better demonstration of source behavior.