| Autor: |
Milutin Kovacev, Ugaitz Elu Etxano, Jens Biegert, Dominik Franz, Quentin Ripault, Rana Nicolas, Maria Kholodtsova, Bianca Iwan, Hamed Merdji, Willem Boutu, Liping Shi |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Advances in Ultrafast Condensed Phase Physics. |
| DOI: |
10.1117/12.2306896 |
| Popis: |
Nanoscale amplification of non-linear processes in solid-state devices opens novel applications in nano-electronics, nano-medicine or high energy conversion for example. Coupling few nano-joules laser energy at a nanometer scale for strong field physics is demonstrated. We report enhancement of high harmonic generation in nano-structured semiconductors using nanoscale amplification of a mid-infrared laser in the sample rather than using large laser amplifier systems. Field amplification is achieved through light confinement in nano-structured semiconductor 3D waveguides. The high harmonic nano-converter consists of an array of zinc-oxide nanocones. They exhibit a large amplification volume, 6 orders of magnitude larger than previously reported [1] and avoid melting observed in metallic plasmonic structures. The amplification of high harmonics is observed by coupling only 5-10 nano-joules of a 3.2 µm high repetition-rate OPCPA laser at the entrance of each nanocone. Harmonic amplification (factor 30) depends on the laser energy input, wavelength and nanocone geometry [2]. [1] Vampa et al., Nat. Phys. 13, 659–662 (2017). [2] Franz et al., arXiv:1709.09153 [physics.optics] (2017) |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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