Time‑correlated single‑photon counting (TCSPC) technique is a powerful way to measure the weak light signals. The basic principle behind TCSPC is the photoelectric effect in which an electrical charge is released by absorbing ...
Optics & Photonics
Apr 28, 2022
0
3
A team of researchers at Cornell has developed an ultrathin film of cesium antimonide that can be used as a highly efficient photocathode. In their paper published in the journal Physical Review Letters, the group describes ...
How can researchers use the mechanism of photoionization to gain insight into complex molecular potential? This question has now been answered by a team led by Prof. Dr. Giuseppe Sansone from the Institute of Physics at the ...
Optics & Photonics
Mar 16, 2022
2
105
When light hits a material, electrons can be released from this material—the photoelectric effect. Although this effect played a major role in the development of the quantum theory, it still holds a number of secrets: To ...
Quantum Physics
Feb 10, 2022
312
1010
When it comes to producing high-quality electron beams like those found in state-of-the-art scientific equipment like free-electron lasers, ultrafast electron diffraction and imaging and wakefield accelerators, scientists ...
Nanophysics
Mar 8, 2021
1
57
A new method uses swirls of light to enable researchers to observe previously invisible quantum states of electrons. The method was developed by physicists from Martin Luther University Halle-Wittenberg (MLU) and an international ...
Optics & Photonics
Aug 10, 2020
0
73
Scientific research is based on the relationship between the reality of nature, as it is observed, and a representation of this reality, formulated by a theory in mathematical language. If all the consequences of the theory ...
Astronomy
May 26, 2020
21
601
The dynamics of electrons change ever so slightly on each interaction with a photon. Physicists at ETH Zurich have now measured such interplay in its arguably purest form—by recording the attosecond-scale time delays associated ...
Optics & Photonics
Mar 23, 2020
0
1032
The creation of photoelectrons through ionisation is one of the most fundamental processes in the interaction between light and matter. Yet, deep questions remain about just how photons transfer their linear momentum to electrons. ...
General Physics
Dec 5, 2019
0
3202
The discovery that free electrons can move asymmetrically provides a deeper understanding of one of the basic processes in physics: the photoelectric effect. It was first described by Albert Einstein and explains how high ...
Optics & Photonics
Oct 1, 2019
0
1139
