title: Observation of zeroth-order band gaps in negative-refraction photonic crystal superlattices at near-infrared frequencies.
abstract: We present the first observations of zero-n[over ] band gaps in photonic crystal superlattices consisting of alternating stacks of negative-index photonic crystals and positive-index dielectric materials in the near-infrared range. Guided by ab initio three-dimensional numerical simulations, the fabricated nanostructured superlattices demonstrate the presence of zeroth-order gaps in remarkable agreement with theoretical predictions across a range of different superlattice periods and unit cell variations. These volume-averaged zero-index superlattice structures present a new type of photonic band gap, with the potential for complete wave front control for arbitrary phase delay lines and open cavity resonances.
authors.affiliation: Columbia University, New York, New York 10027, USA.
authors.forename: S
authors.initials: S
authors.lastname: Kocaman
authors.forename: R
authors.initials: R
authors.lastname: Chatterjee
authors.forename: N C
authors.initials: NC
authors.lastname: Panoiu
authors.forename: J F
authors.initials: JF
authors.lastname: McMillan
authors.forename: M B
authors.initials: MB
authors.lastname: Yu
authors.forename: R M
authors.initials: RM
authors.lastname: Osgood
authors.forename: D L
authors.initials: DL
authors.lastname: Kwong
authors.forename: C W
authors.initials: CW
authors.lastname: Wong