6533b824fe1ef96bd1281697
RESEARCH PRODUCT
Defects in quantum ring to control high-harmonic spectrum
Biagio FrusteriEmilio Fiordilinosubject
Time-resolved spectroscopyPhysicsAtomic and Molecular Physics and OpticIntense laserCondensed Matter Physic02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter PhysicsRing (chemistry)01 natural sciencesSettore FIS/03 - Fisica Della MateriaAtomic and Molecular Physics and OpticsElectron dynamicHarmonic spectrum0103 physical sciencesHigh-harmonic generationElectrical and Electronic EngineeringAtomic physics010306 general physics0210 nano-technologyQuantum ringQuantumdescription
AbstractThe 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-23 | Laser and Particle Beams |