Scientists use titanium nitride to achieve high harmonic generation in refractory metals for the first time
For the first time, researchers used titanium nitride to generate high harmonics in refractory metals. The high harmonics generated from the metal opened the connection between solid and plasma harmonics. High harmonic generation (HHG) is a field where low-frequency lasers generate high-frequency photons, and it is also the cornerstone of nonlinear optics. It has a wide range of applications in the fields of spectroscopy and attoseconds.
In the future, this may pave the way for enhancing HHG by focusing radiation on the nanoscale for nanofabrication, manufacturing, and medical applications, as well as generating frequency combs for the next generation of nuclear clocks.
This interdisciplinary work combines nano-optics, materials science, and machine learning to achieve ultra-high-speed, ultra-thin optics, higher-density photon/quantum circuits, and data storage, harsh environment sensing, biomedical applications, energy conversion, and A new generation of high-efficiency quantum devices at room temperature.
The researchers combined titanium nitride (a refractory metal pioneered by the research team) with extremely short laser pulses, which have extremely high laser tolerance and consist of only a few electric field oscillations.
The laser durability of titanium nitride is 10 times that of gold, which allows researchers to perform high-intensity radiation on it under vacuum ultraviolet conditions, emitting light with a shorter wavelength, up to 110 nanometers, this is the first time in metal use.
