Metallic nanoparticles grown in the core of femtosecond laser micromachined waveguides

Journal Article · Wed May 21 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4875485· OSTI ID:22275517

Almeida, J. M. P.; Ferreira, P. H. D.; Manzani, D.; Napoli, M.; Ribeiro, S. J. L. ^[1]

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1. Institute of Chemistry—São Paulo State University—UNESP, CP 355, Araraquara, Sao Paulo 14801-970 (Brazil)

3D-waveguides containing silver nanoparticles have been fabricated in tungsten lead–pyrophosphate glass by femtosecond laser micromachining. Nucleation and growth of nanoparticles occur in a single step process when high repetition rate laser (MHz) is employed, while an additional annealing is required for the irradiation using kHz laser system. The presence of nanoparticles locally changes the refractive index, and, therefore, the elliptical structures produced by direct laser writing were able to guide light. By increasing the pulse energy applied during the micromachining, the waveguide size increased from 2 to 30 μm, while their propagation loss decrease from 1.4 to 0.5 dB/mm at 632.8 nm.

• OSTI ID: 22275517
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ANNEALING
IRRADIATION
KHZ RANGE
LASER BEAM MACHINING
LEAD COMPOUNDS
MHZ RANGE
NANOSTRUCTURES
NUCLEATION
PARTICLES
PHOSPHATE GLASS
REFRACTIVE INDEX
SILVER
TUNGSTEN COMPOUNDS
VISIBLE RADIATION
WAVEGUIDES