科学与环境
A carefully timed pair of light pulses can amplify the motion of atomic layers in a quantum material
来源: Phys.org - latest science and technology news stories · 发布于
The principle "Work smarter, not harder!" apparently also applies to controlling quantum materials with light. Many of their fascinating properties depend on how the atoms are arranged in the crystal. Ultrashort laser pulses can be used to alter these structures in a targeted way
The principle "Work smarter, not harder!" apparently also applies to controlling quantum materials with light. Many of their fascinating properties depend on how the atoms are arranged in the crystal. Ultrashort laser pulses can be used to alter these structures in a targeted way—the light first excites electrons, whose changed energy and dynamics exert forces on the atomic nuclei and can thereby set the atoms in motion.
Such processes unfold within femtoseconds, a millionth of a billionth of a second.
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