title: Optical surface edge Bloch modes: low-loss subwavelength-scale two-dimensional light localization.
abstract: An optical surface edge Bloch mode is an optical state evanescently bound at an edge on a finite-size three-dimensional photonic crystal; the edge is the intersection of two termination planes on the crystal. Low-loss subwavelength-scale edge modes can appear on an <010> edge of a dielectric woodpile within a complete photonic bandgap. The mode area is as small as 0.066 squared half-in-vacuum-wavelengths. The edge mode has field maxima in vacuum near the termination surface, like surface plasmon modes. This edge mode would provide new opportunities of low-loss light localization in a sub-diffraction-limit space without the use of metal.
authors.affiliation: Electrical and Computer Engineering, Fitzpatrick Institute for Photonics, Duke University, Durham, North Carolina 27708, USA. shuyu.su@duke.edu
authors.forename: Shu-Yu
authors.initials: SY
authors.lastname: Su
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Yoshie