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Photon-controlled diode: An optoelectronic device with a new signal processing behavior

A photodetector is an optoelectronic device that detects and converts optical signals into electrical signals. Photodiodes, phototransistors, and photoconductors are examples of these devices. Although there are many different types of photodetectors with different mechanisms and structures, the representative behaviour can be summarised as a...

Mixing laser beams and X-ray beams

Real laser beams do not interact with each other when they cross. This is until the beams meet within a suitable material that allow for nonlinear light-matter interaction. In this case, wave mixing can give rise to beams with changed colors and directions. Wave-mixing processes...

Time‑correlated single‑photon counting technique to visualize weak pulse electroluminescence

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 a photon. The TCSPC technique counts the single electron pulse created...

Ultrathin films of cesium antimonide used to make more efficient photocathodes

Scientists developed an ultrathin film of cesium antimonide that can be used as a highly efficient photocathode. The study was published in the journal Physical Review Letters. Scientists describes their approach to create the photocathode and how it performed when compared to conventional photocathodes. A...