Academic Terminology

Laser has good monochromaticity, but is it absolutely singular in frequency? Let’s make a brief analysis o …

In the previous discussion of atomic energy levels, the energy level was considered as an idealized model …

Bandwidth refers to the width of a range of frequencies or wavelengths. Formula symbols: Δ ν, Δ λ, unit: h …

If an atom or ion with laser activity is in an excited state – quantum mechanical level (e.g. by an optica …

When light hits the metal, it causes a change in the electrical properties of the substance. This phenomen …

Excited State Absorption (ESA) is a device that causes the absorption of light in the excited state of ato …

微观粒子在不同能级之间的跃迁应该同时存在自发辐射、受激辐射和受激吸收三个过程。 自发辐射 当一个微观粒子初始处于某个高能量的状态的时候由于不稳定性总是趋于回到能量更低的状态。我们把微观粒自发的从高能态跃迁到低能态 …