**Are you an EPFL student looking for a semester project?**

Work with us on data science and visualisation projects, and deploy your project as an app on top of GraphSearch.

Lecture# Light Scattering: Fundamentals and Applications

Description

This lecture covers the fundamentals of light scattering by small particles, discussing the concepts of absorption, scattering, and extinction. The instructor explains the power flow across a closed surface around the scatterer and the different components of the Poynting vector. The lecture also delves into cross sections, efficiencies, and the effective optical size of particles compared to their physical size. The electromagnetic field distribution and the differential cross section for light scattering in different directions are explored, providing insights into the behavior of light interacting with particles.

Official source

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

In course

MICRO-420: Selected topics in advanced optics

This course proposes a selection of different facets of modern optics and photonics.

Instructor

Related concepts (32)

Electromagnetic tensor

In electromagnetism, the electromagnetic tensor or electromagnetic field tensor (sometimes called the field strength tensor, Faraday tensor or Maxwell bivector) is a mathematical object that describes the electromagnetic field in spacetime. The field tensor was first used after the four-dimensional tensor formulation of special relativity was introduced by Hermann Minkowski. The tensor allows related physical laws to be written very concisely, and allows for the quantization of the electromagnetic field by Lagrangian formulation described below.

A Dynamical Theory of the Electromagnetic Field

"A Dynamical Theory of the Electromagnetic Field" is a paper by James Clerk Maxwell on electromagnetism, published in 1865. In the paper, Maxwell derives an electromagnetic wave equation with a velocity for light in close agreement with measurements made by experiment, and deduces that light is an electromagnetic wave. Following standard procedure for the time, the paper was first read to the Royal Society on 8 December 1864, having been sent by Maxwell to the society on 27 October.

Poynting vector

In physics, the Poynting vector (or Umov–Poynting vector) represents the directional energy flux (the energy transfer per unit area per unit time) or power flow of an electromagnetic field. The SI unit of the Poynting vector is the watt per square metre (W/m2); kg/s3 in base SI units. It is named after its discoverer John Henry Poynting who first derived it in 1884. Nikolay Umov is also credited with formulating the concept.

Electromagnetic field

An electromagnetic field (also EM field or EMF) is a classical (i.e. non-quantum) field produced by moving electric charges. It is the field described by classical electrodynamics (a classical field theory) and is the classical counterpart to the quantized electromagnetic field tensor in quantum electrodynamics (a quantum field theory). The electromagnetic field propagates at the speed of light (in fact, this field can be identified as light) and interacts with charges and currents.

Cross section (physics)

In physics, the cross section is a measure of the probability that a specific process will take place when some kind of radiant excitation (e.g. a particle beam, sound wave, light, or an X-ray) intersects a localized phenomenon (e.g. a particle or density fluctuation). For example, the Rutherford cross-section is a measure of probability that an alpha particle will be deflected by a given angle during an interaction with an atomic nucleus. Cross section is typically denoted σ (sigma) and is expressed in units of area, more specifically in barns.

Related lectures (33)

Radiative Properties of Small Spheres

Explores the radiative properties of small spheres, including Rayleigh scattering and absorption efficiencies, with a focus on Mie theory and particle characteristics.

Radiative Heat Transfer

Covers radiative heat transfer, boundary conditions, heat flux, and particle clouds in participating media.

Absorption and Scattering by Spherical Particles

Explores radiative properties of small spheres, Rayleigh scattering, and absorption by spherical particles.

Overview of Particle Physics and Rutherford ScatteringPHYS-415: Particle physics I

Covers the constituents of matter, fundamental forces, the Standard Model, natural units, and particle interaction experiments.

Partons and Hadrons: Strong Force and Deep Inelastic Scattering

Explores partons, hadrons, strong force, deep inelastic scattering, elastic and inelastic scattering, and Bjorken scaling.