title: Guiding and confining light in void nanostructure.
abstract: We present a novel waveguide geometry for enhancing and confining light in a nanometer-wide low-index material. Light enhancement and confinement is caused by large discontinuity of the electric field at high-index-contrast interfaces. We show that by use of such a structure the field can be confined in a 50-nm-wide low-index region with a normalized intensity of 20 microm(-2). This intensity is approximately 20 times higher than what can be achieved in SiO2 with conventional rectangular waveguides.
authors.affiliation: School of Electrical and Computer Engineering, Cornell University, 411 Phillips Hall, Ithaca, New York 14853, USA.
authors.forename: Vilson R
authors.initials: VR
authors.lastname: Almeida
authors.forename: Qianfan
authors.initials: Q
authors.lastname: Xu
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Barrios
authors.forename: Michal
authors.initials: M
authors.lastname: Lipson