Photoemission is an experimental technique that probes the electronic structure of materials by measuring electrons emitted upon photon absorption. In photoemission spectroscopy, monochromatic radiation (from UV to X-ray) excites electrons above the vacuum level, and the kinetic energy and emission angle of these electrons are analyzed to reconstruct binding energies, band dispersion, and Fermi surface topology. Variants include ultraviolet photoemission (UPS) for valence states and X-ray photoemission (XPS) for core-level spectroscopy and chemical analysis. Surface sensitivity arises from the short inelastic mean free path of electrons, making photoemission particularly powerful for studying surface and interface electronic properties.
Electrons are tiny and constantly in motion. How they behave in a crystal lattice determines key material properties: electrical conductivity, magnetism, or novel quantum effects. Anyone aiming to develop the information ...
Condensed Matter
Mar 15, 2026
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When an electron travels through a polar crystalline solid, its negative charge attracts the positively charged atomic cores, causing the surrounding crystal lattice to deform. The electron and lattice distortion then move ...
Condensed Matter
Feb 17, 2026
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With an advanced technology known as angle-resolved photoemission spectroscopy (ARPES), scientists are able to map out a material's electron energy-momentum relationship, which encodes the material's electrical, optical, ...
Condensed Matter
Feb 2, 2026
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53
In a new study published in Nature Physics, researchers have demonstrated that quantum light, particularly bright squeezed vacuum (BSV), can drive strong-field photoemission at metal needle tips.
What happens when electrons leave a solid material? This seemingly simple phenomenon has, until now, eluded accurate theoretical description. In a new study, researchers have found the missing piece of the puzzle.
Condensed Matter
Oct 20, 2025
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251
Researchers at the Max Planck Institute for the Structure and Dynamics of Matter (MPSD), in collaboration with international partners, have developed momentum-resolved Floquet optical selection rules. They show how these ...
Condensed Matter
Aug 21, 2025
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For the first time, researchers have been able to measure the quantum state of electrons ejected from atoms that have absorbed high-energy light pulses. This is thanks to a new measurement technique developed by researchers ...
Optics & Photonics
Feb 12, 2025
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96
Strong field quantum optics is a rapidly emerging research topic, which merges elements of non-linear photoemission rooted in strong field physics with the well-established realm of quantum optics. While the distribution ...
Photon-number distributions of various light sources have been studied extensively. However, little is known about the statistical distribution of electrons emitted under the effect of intense light.
Optics & Photonics
May 13, 2024
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Carbon dots (CDs) are an intriguing class of nanomaterials that have attracted a great deal of attention in recent years. These carbon-based materials possess excellent fluorescence properties, making them highly appealing ...
Bio & Medicine
Apr 19, 2024
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