An electric field induced delocalization transition in second-harmonic generation effect
| Autor: | Sohrab Behnia, M. Khodavirdizadeh, J. Ziaei |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Chaotic Phase (waves) Inverse 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Delocalized electron Quantum mechanics Electric field 0103 physical sciences Electrical and Electronic Engineering 010306 general physics 0210 nano-technology Singularity spectrum Random matrix Quantum |
| Zdroj: | Optical and Quantum Electronics. 49 |
| ISSN: | 1572-817X 0306-8919 |
| Popis: | The emergence of second-harmonic generation (SHG) is a pivotal issue to the development of nano-optical devices and interfaces. Here, we perform a quantum analysis of the spectral statistics of the SHG resonances with the aim of determining the instability of this process. We compute different independent statistical properties to being chaotic. We find that the short-range fluctuations of the resonances at electric fields with different intensities are in agreement with random matrix theory (RMT) predictions. We conclude that although in low intensities of electric field the SHG dynamics follows Poisson statistics, in high intensities the dynamics is chaotic (ergodic). On the other hand, a study of the singularity spectrum of eigenstates provides additional evidence supporting RMT predictions. We also analyze the inverse participation ratio of eigenstates and find that it equals $$\sim$$ 0.5 in localized phase, and approaches to $$1/dim(\mathcal {H})$$ in delocalized (chaotic) phase. |
| Databáze: | OpenAIRE |
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