Harmonic radiation from crystals
| Autor: | Takuya Higuchi, Peter Hommelhoff |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Nature. 523:541-542 |
| ISSN: | 1476-4687 0028-0836 |
| Popis: | Electrons in a crystal can tunnel between energy bands when a strong electric field is switched on. It emerges that electron pathways interfere almost instantaneously, giving rise to ultra-short, pulsed emission of light. See Letter p.572 A new field of ultrafast photonics in solids has emerged with the demonstration, first reported a few years ago, of short wavelength radiation in bulk crystals produced via high-harmonic generation. The underlying mechanisms are involved in this phenomenon are under intense investigation. Matthias Hohenleutner et al. study in particular the generation of high harmonics in bulk with time-resolved measurements. They find that the underlying motion of electrons differs from the mechanism of high-harmonic generation in atomic gasses and involves quantum interference between electrons from multiple valence bands. This observed effect suggests new directions for the development of solid-state ultrafast light sources and light-controlled electronics. |
| Databáze: | OpenAIRE |
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