Basic: SOI

The simplest EMode simulation example.

This code example is licensed under the BSD 3-Clause License.

  • Python
  • MATLAB
import emodeconnection as emc

## Set simulation parameters
wavelength = 1550 # [nm] wavelength
dx, dy = 10, 10 # [nm] resolution
w_core = 600 # [nm] waveguide core width
w_trench = 800 # [nm] waveguide side trench width
h_core = 500 # [nm] waveguide core height
h_clad = 800 # [nm] waveguide top and bottom clad
num_modes = 2 # [-] number of modes

## Connect and initialize EMode
em = emc.EMode()

## Settings
em.settings(
    wavelength = wavelength, x_resolution = dx, y_resolution = dy,
    window_width = w_core + w_trench*2, window_height = h_core + h_clad*2,
    num_modes = num_modes, background_refractive_index = 'Air')

## Draw shapes
em.shape(name = 'BOX', refractive_index = 'SiO2', height = h_clad)
em.shape(name = 'core', refractive_index = 'Si', width = w_core, height = h_core)

## Launch FDM solver
em.FDM()

## Display the effective indices, TE fractions, and core confinement
em.report()

## Plot the field and refractive index profiles
em.plot()

## Close EMode
em.close()
% Set simulation parameters
wavelength = 1550; % [nm] wavelength
dx = 10; dy = 10; % [nm] resolution
w_core = 600; % [nm] waveguide core width
w_trench = 800; % [nm] waveguide side trench width
h_core = 500; % [nm] waveguide core height
h_clad = 800; % [nm] waveguide top and bottom clad
num_modes = 2; % [-] number of modes

% Connect and initialize EMode
em = emodeconnection();

% Settings
em.settings( ...
    'wavelength', wavelength, 'x_resolution', dx, 'y_resolution', dy, ...
    'window_width', w_core + w_trench*2, 'window_height', h_core + h_clad*2, ...
    'num_modes', num_modes, 'background_refractive_index', 'Air');

% Draw shapes
em.shape('name', 'BOX', 'refractive_index', 'SiO2', 'height', h_clad);
em.shape('name', 'core', 'refractive_index', 'Si', 'width', w_core, 'height', h_core);

% Launch FDM solver
em.FDM();

% Display the effective indices, TE fractions, and core confinement
em.report();

% Plot the field and refractive index profiles
em.plot();

% Close EMode
em.close();

Console output:

EMode 0.0.7-b5 - username
Meshing... completed in 0.1 sec
Solving... completed in 1.1 sec

Wavelength: 1550.0 nm

  Mode #     n_eff    TE %    Loss (dB/m)
--------  --------  ------  -------------
    TE-0  3.026515  99.7 %          0.000
    TM-1  2.980822   0.5 %          0.000

Exited EMode

Figures:

../_images/0Ex.png
../_images/1Ey.png
../_images/index_plot.png