Detecting a pronounced delocalized state in third-harmonic generation phenomenon; a quantum chaos approach
Abstract
Nonlinear optics (NLO) deserves special attention in new optical devices, making it possible to generate coherent light more efficiently. Among the various NLO phenomena the third-harmonic generation (THG) is at the core of the effective operating mechanism of broadband wavelength conversion, in all-optical devices. Here, we aim to understand how the third-order susceptibility and the electric field may be effectively effect on the localization properties of the light in the THG process when included in a two-mode cavity coherently perturbed by a classical field. We address a stable-unstable transition due to the combination effect of the aforementioned factors. We report a reliable evidence confirming the appearance of chaos in THG under suitable conditions. By tracing the signatures of adjacent-spectral-spacing-ratio (ASSR) distribution and participation ratio, we also find a critical point (ɛc ,κc) =(3 . 1 , 0 . 35) for which a pronounced delocalized response is seen. This study may have profound findings for practical devices, and ushers in new opportunities for practical exploitation of the electric field and the third-order susceptibility effect in nonlinear optical devices.
- Publication:
-
Optics Communications
- Pub Date:
- June 2018
- DOI:
- 10.1016/j.optcom.2018.02.004
- Bibcode:
- 2018OptCo.416...19B
- Keywords:
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- Third-harmonic generation;
- Quantum chaos;
- Integrable-chaos transition;
- Poisson-GOE statistics