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Phonons

Definition: quantized microscopic vibrations in solid media

German: Phononen

Category: physical foundations

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According to quantum mechanics, microscopic vibrations (sound waves) in solid media are quantized. This means that vibration energy can only be exchanged in the form of so-called phonons, which have an energy which is Planck's constant h multiplied by the phonon frequency.

Phonons are important for the physics of solid-state lasers:

See also: multi-phonon transitions, quenching, Raman scattering, Brillouin scattering, solid-state lasers, vibronic lasers, gain bandwidth, photons
and other articles in the category physical foundations

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