Light Matter Interaction - copl-labomc/wikiOMC GitHub Wiki

Divisions selon F. Leblond (if I remember correctly): Absorption, Reflexion, Refraction, Transmission where I think the last 3 could be presented a sub-divisions of scattering. It could all be divisions of scattering as absorption could be presented as inelastic scattering. The only thing that doesn't fit I think is when light absorbed is converted in another type of energies (heat, electricity, etc.) I could start by dividing in two the energy loss pipeline: scatter(energy finishes as at least partly EM, if it is so inelastic that you go from UV to IR PL, isn't it stretching the meaning of scattering a bit too much?) vs convert(no more EM waves)? There must be more info to be found in reading about scattering in the big picture: check the Handbook of photonics among others + scattering is studied for almost any type of shooted particles (get illustration of experimental physics always striving for more energy shooting particles of higher & higher energies since the days of Rutherford and before. Light, photons beams at everyday energies are the one with most control, flexibility. We leave in huge a bath of electromagnetic waves, especially when including radiowaves and thermal emissions!).

Scattering considered like particle transport: Ballistic photons, Serpentine photons, Diffusive photons.

The graph I first saw in Nathalie's class with onset of electronic, vibrational, rotational absorption, I think it's in handbook of photonics too. Link to matter energy levels like F. Leblond and incorporate the annoying Jablownski diagram.

section on Scattering vs size of particle: Rayleigh for smallest particles (scatters almost uniformly in all directions, \lambda>>matter size refractive index-permittivity concept fails it's for macro-matter, matter as a dipôle-quadrupôle-.. and its polarizability.), Mie scattering when for bigger particles (preferentially forward scattering, to check), then it should get to macro-milieux continus for \lambda << size of matter. Matter perturb light vs light perturb matter.

That will be a hell of a page! Might get too big, maybe split & link onto another page for luminescence and yet another for metrology and its vocabulary: spectroscopy/interferometry, imaging (micro-meso-macrosopy), dynamics (time-resolved techniques), radiometry (briefly pitch photometry): never underestimate direct detection of total light, get into photodetectors/sensors of all kinds. Guess I should talk about sources too: experiment always = source->sample->detector (sun-planet-our eyes as an example) fundamentally never complicated, but adds tons and tons of things in it: polarization, filters (both to change irradiance parameter and select colors), gratings, etc.

Concept, start with light-matter interaction as a context (stimulated emission & scattering are gonna be fun...) Transition as metrology challenge to measure absolute light intensity (where the latter is common vocabulary to watch) vs current for example, then IUPAC & SI radiometry: https://en.wikipedia.org/wiki/Radiometry + CIE vocabulary & metrology

Main resources: rigorous Valeur with illustrated Lakowickz(sp?) to help