SWSO

SWSO - Surface Wave Sensor Optimizer

Surface Plasmon Resonance (SPR) & Bloch Surface Waves (BSW)

by Leonardo Machado Cavalcanti, master student at PPGEE-UFPE advised by Prof. Eduardo Fontana.

Versão em Português: Clique Aqui

Number of Interfaces M:
Sensing Medium:

Medium 1:
n₁:
κ₁:

Medium 2:
n₂:
κ₂:

d₂ (μm):

Medium 3:
n₃:
κ₃:

d₃ (μm):

Meio 4:
n₄:
κ₄:

d₄ (μm):

Meio 5:
n₅:
κ₅:

d₅ (μm):

Meio 6:
n₆:
κ₆:

d₆ (μm):

Meio 7:
n₇:
κ₇:

d₇ (μm):

Meio 8:
n₈:
κ₈:

d₈ (μm):

Meio 9:
n₉:
κ₉:

d₉ (μm):

Meio 10:
n₁₀:
κ₁₀:

d₁₀ (μm):

Meio 11:
n₁₁:
κ₁₁:

d₁₁ (μm):

Meio 12:
n₁₂:
κ₁₂:

d₁₂ (μm):

Meio 13:
n₁₃:
κ₁₃:

d₁₃ (μm):

Meio 14:
n₁₄:
κ₁₄:

d₁₄ (μm):

Meio 15:
n₁₅:
κ₁₅:

d₁₅ (μm):

Meio 16:
n₁₆:
κ₁₆:

d₁₆ (μm):

Meio 17:
n₁₇:
κ₁₇:

d₁₇ (μm):

Meio 18:
n₁₈:
κ₁₈:

d₁₈ (μm):

Meio 19:
n₁₉:
κ₁₉:

d₁₉ (μm):

Meio 20:
n₂₀:
κ₂₀:

d₂₀ (μm):

Meio 21:
n₂₁:
κ₂₁:

d₂₁ (μm):

Sensitivity (p-waves) S_p = |dR_p/dn|: (fixed λ e θ)
Sensitivity (s-waves) S_s = |dR_s/dn|: (fixed λ e θ)
__________________________________________________________________________
Polarization: p s

Angular Sweep for Reflectance:
λ (μm):
Plot limits: θ₁ ( °):
θ₂ ( °):
with step of Δθ ( °):

Spectral Sweep for Reflectance:
θ ( °):
Plot limits: λ:₁ (μm):
λ:₂ (μm):
with step of Δλ (μm):

Angular Sweep for Sensitivity (Absolute Value):
the limits and the step for this option are same as those in Angular Sweep for the Reflectance
Vertical axes: from until

__________________________________________________________________________ Automatic Filling for bilayer periodic structres Yes No

Medium H:
n_H:
κ_H:
d_H (μm):
Medium L:
n_L:
κ_L:
d_L (μm):

__________________________________________________________________________

Meio 22:
n₂₂:
κ₂₂:

d₂₂ (μm):

Meio 23:
n₂₃:
κ₂₃:

d₂₃ (μm):

Meio 24:
n₂₄:
κ₂₄:

d₂₄ (μm):

Meio 25:
n₂₅:
κ₂₅:

Sensor Optimization - Heuristic Algorithms
MonteCarlo & Particle Swarm Optimization (PSO)
Algorithm: Monte Carlo PSO
Number of iterations:
Number of points:
Polarization: p s

Search Space:
θ_L ( °): defined by the app
θ_H ( °): defined by the app
d_L (μm):
d_H (μm):

Specific Parameters for PSO:
Inertia Weight(global exploration) w:
Cognitive parameter c₁:
Social parameter c₂:

θ_optimum ( °):
d_optimum (μm):
S_max:

Execution time:
d: thickness of the layer adjacent to the sensing medium.

Web app implemented in Python (server-side) with input/output browser interface in HTML/JavaScript/AJAX/JQuery/Flot.

Instructions:

Maximum number of media: 25 (24 interfaces).
n: refractive index, κ: extinction coefficient, θ: incidence anlge, λ: wavelength, S: Sensitivity;
Material database references are shown hovering the mouse over the pop-up menus;
When the user defines the values of n e κ, they are considered constants relative to the wavelength;
Web site with several databases of materials optical constants: http://refractiveindex.info/
The Automatic Filling allows the user to insert the parameters of a 1D Photonic Crystal rapidly;
For the Kretschmann configuration, select (3,4,5,...) as the sensing medium, whereas for the Otto configuration select (2);
The values of the sensitivity and of the optimization outcomes depend on what sensing medium was selected;
The definition of the search space is done by the user (thickness) and by the app (incidence angle); The app defines the search interval for the angle based on the physcal equations of the SPR.
Run at least 10 times the heuristic algorithms to check the consistency of the optimum points. The optimizations is based on maximizing the Sensitivity;
Hover the mouse over the points of the curve for seeing their coordinates;
Select an area of the graph with the mouse for zoom in. Double-click for zoom out;
The user needs to adjust Δθ and Δλ for refining the resolution of the plot;
NaN is replaced by 0 (zero) in order to the Flot library be able to plot the curves.
This app may be useful for optical filters design and other photonic devices;
Contact email: leonardomachado3112@gmail.com