Lecture

Laser Micro-Processing: Materials and Spectroscopy

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In course

MICRO-520: Laser microprocessing

The physical principles of laser light materials interactions are introduced with a large number of industrial application examples. Materials processing lasers are developing further and further, the lecture presents the physical limitations of the proces ...

Description

This lecture covers the micro-processing of materials using laser technology, focusing on fluorescence, absorption, and emission spectra. It also delves into the principles of infrared spectroscopy, vibronic transitions, band structures of solids and metals, and the transmission spectra of different materials.

Instructor

Patrik Willi Hoffmann

Expertise WettabilityMico-structuringElectron-beam DepositionPhotodepositionPhotoablationNano-optics Mission Patrik Hoffmann is heading the laboratory for Advanced Materials Processing at Empa. Laser materials processing including Additive Manufacturing are key topics in recent years.At the EPFL cite in the Laboratory for Optical Materials and Characterization LPMAT, novel functional material depositions by HV-CVD are studied. Recently BaTiO3 heteroepitaxial films have been grown on SrTiO3 buffered silicon

Official source

Ontological neighbourhood

Chemistry

Physical chemistry: Spectroscopy

Related concepts (31)

Spectroscopy

Spectroscopy is the field of study that measures and interprets the electromagnetic spectra that result from the interaction between electromagnetic radiation and matter as a function of the wavelength or frequency of the radiation. Matter waves and acoustic waves can also be considered forms of radiative energy, and recently gravitational waves have been associated with a spectral signature in the context of the Laser Interferometer Gravitational-Wave Observatory (LIGO).

Absorption spectroscopy

Absorption spectroscopy refers to spectroscopic techniques that measure the absorption of electromagnetic radiation, as a function of frequency or wavelength, due to its interaction with a sample. The sample absorbs energy, i.e., photons, from the radiating field. The intensity of the absorption varies as a function of frequency, and this variation is the absorption spectrum. Absorption spectroscopy is performed across the electromagnetic spectrum.

Electronic band structure

In solid-state physics, the electronic band structure (or simply band structure) of a solid describes the range of energy levels that electrons may have within it, as well as the ranges of energy that they may not have (called band gaps or forbidden bands). Band theory derives these bands and band gaps by examining the allowed quantum mechanical wave functions for an electron in a large, periodic lattice of atoms or molecules.

Laser

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word laser is an anacronym that originated as an acronym for light amplification by stimulated emission of radiation. The first laser was built in 1960 by Theodore Maiman at Hughes Research Laboratories, based on theoretical work by Charles H. Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light that is coherent.

Mössbauer spectroscopy

Mössbauer spectroscopy is a spectroscopic technique based on the Mössbauer effect. This effect, discovered by Rudolf Mössbauer (sometimes written "Moessbauer", German: "Mößbauer") in 1958, consists of the nearly recoil-free emission and absorption of nuclear gamma rays in solids. The consequent nuclear spectroscopy method is exquisitely sensitive to small changes in the chemical environment of certain nuclei.

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