Modulational Instability in Periodic Quadratic Nonlinear Materials | Joel F. Corney, Ole Bang
| | Abstract | We investigate the modulational instability of plane waves in quadratic nonlinear materials with linear and nonlinear quasi-phase-matching gratings. Exact Floquet calculations, confirmed by numerical simulations, show that the periodicity can drastically alter the gain spectrum but never completely removes the instability. The low-frequency part of the gain spectrum is accurately predicted by an averaged theory and disappears for certain gratings. The high-frequency part is related to the inherent gain of the homogeneous non-phase-matched
material and is a consistent spectral feature. | | Type | Journal paper [With referee] | | Journal | Physical Review Letters | | Year | 2001 Month September Vol. 87 No. 13 pp. 1-4/133901 | | BibTeX data | [bibtex] | | IMM Group(s) | Mathematical Physics |
|