The phase and the group velocity of light propagating in conventional optical media cannot exceed the speed of light in ...

Chirality is a fundamental property of matter that determines many biological, chemical and physical phenomena. Chiral solids, for example, offer exciting opportunities for catalysis, sensing and ...

A novel method transforms common liquids into epsilon-near-zero materials using femtosecond laser pulses, enabling unique ...

Terahertz (THz) quantum cascade lasers (QCLs) are a cutting-edge technology that operates in the terahertz frequency range ... as opposed to pulsed output. Absorption Spectroscopy: A technique ...

Emission is then obtained at the difference frequency of the ... regarding generation of terahertz radiation changed in the 1980s when lasers producing femtosecond pulses became available.

Then, when hit with a terahertz laser, the atoms are stimulated to the same frequency as the material’s collective vibration, or “phonons.” This nudges FePS 3 out of its antiferromagnetic balance and ...

Scientists from the (MPSD) and MIT have achieved a groundbreaking feat — creating a stable, long-lasting magnetic state in an antiferromagnetic material using only light. This discovery could lead to ...

Abstract: We propose and experimentally demonstrate a terahertz (THz) source based on optical rectification in lithium niobate wafers driven by an ultrafast ytterbium laser. Terahertz pulses with a ...

Using a terahertz laser, scientists successfully vibrated atoms at the same frequency as the material ... “This terahertz pulse is what we use to create a change in the sample,” Tianchuang ...

“If you were to pull one atom, it would vibrate at a characteristic frequency which typically occurs in the terahertz ... the team also aimed two near-infrared lasers at the sample, each with an ...

While normal lasers emit light in just one color, frequency comb lasers send out pulses of thousands to millions of colors—all at the same time. In the new study, the researchers used common ...