Theory of critical enhancement of photorefractive beam coupling

Autor(en): Podivilov, EV
Sturman, BI
Gorkunov, MV
Kamenov, VP
Ringhofer, KH
Stichwörter: ABSENCE; BI12SIO20; CRYSTALS; DC-FIELD; DIFFRACTION; GENERATION; GRATINGS; INSTABILITY; Physics; Physics, Fluids & Plasmas; Physics, Mathematical; SPATIAL SUBHARMONICS; TRANSVERSAL PARAMETRIC OSCILLATION
Erscheinungsdatum: 2002
Herausgeber: AMER PHYSICAL SOC
Journal: PHYSICAL REVIEW E
Volumen: 65
Ausgabe: 4, 2B
Zusammenfassung: 
We develop the idea of critical enhancement of the photorefractive response near the threshold of parametric excitation of space-charge waves (the spatial subharmonics) taking into account the vectorial character of beam coupling and a fairly strong broadening of the nonlinear resonance owing to light absorption. The results of our calculations are a description of the measurable characteristics of critical enhancement and optimization of the experimental conditions for detection of anomalously high amplification gain factors in cubic Bi12SiO20 crystals.
ISSN: 15393755
DOI: 10.1103/PhysRevE.65.046623

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