MnpPlasmon 0.1.0

MNP Plasmon - C# NuGet Package

Modern .NET library for calculating optical response of metallic nanoparticles using Drude model and Rayleigh approximation.

Features

• .NET 6.0+ implementation with System.Numerics.Complex
• Drude model for metallic dielectric function
• Rayleigh polarizability calculations
• Optical cross-sections: extinction, scattering, absorption
• Material database: Au, Ag, Al with realistic parameters
• High-level API for complete sphere response simulation
• Comprehensive unit tests with xUnit
• Nullable reference types enabled for better type safety
• XML documentation for IntelliSense

Installation

Install via NuGet Package Manager:

dotnet add package MnpPlasmon

Or in Visual Studio Package Manager Console:

Install-Package MnpPlasmon

Build from Source

dotnet build
dotnet test
dotnet run --project Demo

Usage

using MnpPlasmon;

// Simulate Au nanoparticle response
var response = MnpPlasmon.SimulateSphereResponse(
    "Au",           // material
    550.0,          // wavelength (nm)
    20.0,           // radius (nm)
    1.33            // medium refractive index (water)
);

MnpPlasmon.PrintResponse(response);

Console.WriteLine($"Extinction: {response.CExt:E6} nm²");
Console.WriteLine($"Scattering: {response.CSca:E6} nm²");
Console.WriteLine($"Absorption: {response.CAbs:E6} nm²");

API Reference

Material Functions

IReadOnlyList<Material> MaterialList()
bool MaterialExists(string name)
Material GetMaterial(string name)

Dielectric Functions

Complex DrudeEpsilon(string material, double wavelengthNm)
Complex ConstantEpsilon(double nSquared)

Rayleigh Theory

Complex RayleighPolarizability(
    double radiusNm,
    Complex epsParticle,
    Complex epsMedium
)

CrossSections RayleighCrossSections(
    double wavelengthNm,
    double radiusNm,
    Complex epsParticle,
    Complex epsMedium
)

High-level API

SphereResponse SimulateSphereResponse(
    string material,
    double wavelengthNm,
    double radiusNm,
    double mediumRefractiveIndex
)

Utilities

void PrintResponse(SphereResponse response)

Data Types

All types use C# records for immutability:

record Material(
    string Name,
    double OmegaP,
    double Gamma,
    double EpsInf
);

record SphereResponse(
    double WavelengthNm,
    double RadiusNm,
    double MediumRefractiveIndex,
    Complex EpsParticle,
    Complex Polarizability,
    double CExt,
    double CSca,
    double CAbs
);

record CrossSections(
    double CExt,
    double CSca,
    double CAbs
);

Requirements

• .NET 6.0 or higher
• No external dependencies for core library

License

GPL-3.0-only - See LICENSE file for details

Links

• Erlang package
• Racket package
• npm packages
• GitHub repository