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Title: Metallic nanoparticles grown in the core of femtosecond laser micromachined waveguides

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.
Authors:
; ;  [1] ; ; ;  [2]
  1. Instituto de Física de São Carlos, Universidade de São Paulo—USP, CP 369, São Carlos, Sao Paulo 13560-970 Brazil (Brazil)
  2. Institute of Chemistry—São Paulo State University—UNESP, CP 355, Araraquara, Sao Paulo 14801-970 (Brazil)
Publication Date:
OSTI Identifier:
22275517
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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