Laser writing of nonlinear optical properties in silver-doped phosphate glass.
PETIT, Yannick
Centre d'Etudes Lasers Intenses et Applications [CELIA]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
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Centre d'Etudes Lasers Intenses et Applications [CELIA]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
PETIT, Yannick
Centre d'Etudes Lasers Intenses et Applications [CELIA]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
< Reduce
Centre d'Etudes Lasers Intenses et Applications [CELIA]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Language
en
Article de revue
This item was published in
Optics Letters. 2017, vol. 42, n° 9, p. 1688-1691
Optical Society of America - OSA Publishing
English Abstract
The formation of both local second- and third-harmonic generations (SHG and THG) induced by a train of femtosecond laser pulses in silver-doped phosphate glasses is addressed. Based on modeling calculations, including ...Read more >
The formation of both local second- and third-harmonic generations (SHG and THG) induced by a train of femtosecond laser pulses in silver-doped phosphate glasses is addressed. Based on modeling calculations, including various diffusion and kinetic processes, THG is shown to result from the formation of silver clusters. The latter organize into a ring-shape structure, leading to the emergence of a static electric field. By breaking the glass centro-symmetry, this field gives rise to a local effective second-order susceptibility, inducing SHG. Both theoretically predicted SHG and THG evolutions with respect to the number of pulses in the train are in good agreement with experimental observations. In particular, the observed reaching of a maximum in the nonlinear optical responses after a few thousands of pulses is explained by the competition of various physical processes. A cooling of the glass is shown to improve the process efficiency of the laser writing of second-order nonlinearity.Read less <
Origin
Hal imported