By G. I. Stegeman
In recent times the physics of electromagnetic floor phenomena has built speedily, evolving into applied sciences for communications and undefined, resembling fiber and built-in optics. the diversity of phenomena in accordance with electromagnetism at surfaces is wealthy and this ebook was once written with the purpose of summarizing the to be had wisdom in chosen parts of the field.
The e-book includes stories written by means of strong kingdom and optical physicists at the nonlinear interplay of electromagnetic waves at and with surfaces and movies. either the actual phenomena and a few power functions are handled. incorporated are discussions of nonlinear wave blending on motion pictures and surfaces, moment harmonic iteration in waveguides and at surfaces, nonlinear waves guided via dielectric and semiconductor surfaces and flicks, floor gratings shaped via excessive strength laser beams, and mirrored image and transmission switching of sturdy beams onto nonlinear surfaces. Chapters on mild scattering from floor excitations and magnetic order-disorder and orientational section transitions entire this crucial contribution to the trendy optics literature
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Extra info for Nonlinear Surface Electromagnetic Phenomena
If the p u m p and signal (or idler, respectively) waves only are guided optical modes, the spectrum of the guided fluorescence broadens. D u e to the continuum of substrate modes with a corresponding continuum of different wave vectors a band of emission frequencies is allowed. It is separated from the frequency of the 'all-guided' fluorescence by a small gap which depends on the waveguide structure. The overlap of the interacting modes determines the wavelength dependent intensity (schematically drawn in fig.
Both results demonstrate that high-gain cw amplifiers, as needed for fiber optical communication, cannot be designed on the basis of nonlinear T i : L i N b 0 3 optical waveguides for parametric amplification. F o r such an application new materials of larger nonlinearity have to be found or developed (see section 3). Nevertheless, there is one important application also of small parametric amplification, if the nonlinear waveguide is positioned inside an optical resonator: if then the parametric gain exceeds the roundtrip losses of an optical wave, parametric oscillation at signal and idler frequencies starts from noise (from spontaneous parametric fluorescence).
Therefore, it is of interest to analyze the spectral ranges accessible by D F G in L i N b 0 3 . Figure 33 presents the tuning characteristics for parametric three-wave interactions (including S H G , sum frequency generation, D F G and parametric amplification and oscillation) as signal and idler (vacuum) wavelengths versus the p u m p (vacuum) wavelength. These characteristics include energy (1/λρ = 1/ÀS + l/zlj) and wave vector conservation (ηρ/λρ = nJXs + n-JÀ^; parameter is the crystal (waveguide) temperature, which changes the indices of refraction and in that way the phase-match wavelengths.
Nonlinear Surface Electromagnetic Phenomena by G. I. Stegeman