Compartir
Titolo
Intrinsic second harmonic generation from un-poled doped silica multilayered thin films.
Autor(es)
Clasificación UNESCO
22 Física
Fecha de publicación
2018
Editore
Optica Publishing Group [Society Publisher]
Citación
Seyed Hamed Jafari, Jose Antonio Novoa Lopez, Tahseen Haque, Jacques Albert, and Christopher W. Smelser, "Intrinsic second harmonic generation from un-poled doped silica multilayered thin films," Opt. Mater. Express 8, 1-11 (2018)
Resumen
[EN]Second harmonic light generation (SHG) was observed from as-deposited silica glass thin films suitable for waveguiding, without the need for an inversion symmetry-breaking poling treatment. Thin film stacks of up to 16 layers of alternating 2% phosphorus-doped and undoped silica glass on silica substrates were prepared and probed with a pulsed Nd:YAG laser at 1064 nm. We observed that even though these structures were not poled, they possess a net second order non-linearity with a value of the order of 0.03 pm/V. The SHG increased with the number of layers (total thicknesses between 4 and 9.6 µm have been tested) and also depended on the thickness ratio between the doped and undoped layers. Annealing at 800°C for 4 hours removed the nonlinearity completely.
URI
ISSN
2159-3930
Versión del editor
Aparece en las colecciones