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Transverse second-harmonic generation from disordered nonlinear crystals

100%
Fischer R., Saltiel S., Neshev D., Krolikowski W., Kivshar Y.
Open Physics
|
2008
|
vol. 6
|
issue 3
569-574
EN
We investigate the transverse second-harmonic generation in as grown strontium barium niobate (SBN) crystals with a random structure of anti-parallel ferroelectric domains. We consider both, single and counter-propagating pulse geometries. We investigate polarization properties of the second harmonic signal and discuss applications of this process for short pulses characterization.
2
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Effect of Fano Resonance in photovoltaic

61%
Sun D.
Coherent Phenomena
|
2014
|
vol. 2
|
issue 1
EN
We have shown that the Fano interference in the decay channels of a three-level system can lead to considerably different absorption and emission profiles. We found that a coherence can be built up in the ground state doublet, with strength depending on a coupling parameter that arises from the Fano interference. The coherence can in principle lead to breaking of the detail balance between the absorption and emission processes in atomic systems.
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