Defects in quantum ring to control high-harmonic spectrum
| Autor: | Biagio Frusteri, Emilio Fiordilino |
|---|---|
| Přispěvatelé: | Fiordilino, E., Frusteri, B. |
| Rok vydání: | 2017 |
| Předmět: |
Time-resolved spectroscopy
Physics Atomic and Molecular Physics and Optic Intense laser Condensed Matter Physic 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Ring (chemistry) 01 natural sciences Settore FIS/03 - Fisica Della Materia Atomic and Molecular Physics and Optics Electron dynamic Harmonic spectrum 0103 physical sciences High-harmonic generation Electrical and Electronic Engineering Atomic physics 010306 general physics 0210 nano-technology Quantum ring Quantum |
| Zdroj: | Laser and Particle Beams. 35:126-136 |
| ISSN: | 1469-803X 0263-0346 |
| Popis: | The high-harmonic generation from a structured quantum ring (SQR) driven by an intense laser field is presented within the single active electron approximation. The spectrum is studied by varying the symmetry of the physical system. The standard SQR (six identical and equidistant dots in a ring) presents a 60° rotational symmetry, that in this work is broken, moving or changing only one potential hole. We find that careful designed breaking of the geometrical symmetry of the SQR opens the possibility of controlling the characteristics of the harmonic lines such as intensity and polarization. HHG analysis of the emission spectrum performed through a Morlet wavelet, shows that the high-frequency emission occurs during short time intervals. |
| Databáze: | OpenAIRE |
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