This Collection brings together original research on high harmonic generation, focusing on the underlying physical mechanisms and on the next generation of experimental setups. It also highlights the ...

High harmonic generation (HHG) is a highly non-linear phenomenon where a system (for example, an atom) absorbs many photons of a laser and emits photons of much higher energy, whose frequency is a ...

Researchers from Yokohama National University have developed a method to study how titanium's electron orientation and behavior influence its physical properties. Their findings, published in ...

When a laser experiment fails to produce the expected flash of light, most researchers would assume something went wrong with the hardware. In this case, the missing signal turned out to be the most ...

High-order harmonic generation (HHG) — a technique that converts light into much higher frequencies — is an essential tool for exploring otherwise inaccessible parts of the electromagnetic spectrum.

Scientists have found a way to see ultrafast molecular interactions inside liquids using an extreme laser technique once thought impossible for fluids. When they mixed nearly identical chemicals, one ...