title: Group-index engineering in silicon corrugated waveguides.
abstract: We demonstrate group-index engineering in a one-dimensional periodic silicon structure consisting of a deep-etched laterally corrugated waveguide with circular holes patterned onto its wide section. Our theoretical analysis, supported by experimental results, shows that the first-order optical mode can propagate inside the Brillouin zone with a relatively high group index over a wide frequency range. Nearly constant group index as high as 13.5 over a wavelength range of approximately 14 nm is experimentally demonstrated in a 50-microm-long waveguide.
authors: Nanophotonics Technology Center, Universidad Politécnica de Valencia, Camino de Vera s/n 46022, Valencia, Spain. abrimont@ntc.upv.es
authors: Antoine
authors: A
authors: Brimont
authors: Jose Vicente
authors: JV
authors: Galán
authors: Jose Maria
authors: JM
authors: Escalante
authors: Javier
authors: J
authors: Martí
authors: Pablo
authors: P
authors: Sanchis