title: Near-zero anomalous dispersion Ge11.5As24Se64.5 glass nanowires for correlated photon pair generation: design and analysis.
abstract: We show that highly nonlinear chalcogenide glass nanowire waveguides with near-zero anomalous dispersion should be capable of generating correlated photon-pairs by spontaneous four-wave mixing at frequencies detuned by over 17 THz from the pump where Raman noise is absent. In this region we predict a photon pair correlation of >100, a figure of merit >10 and brightness of ~8×10(8) pairs/s over a bandwidth of >15 THz in nanowires with group velocity dispersion of <5 ps∙km(-1) nm(-1). We present designs for double-clad Ge(11.5)As(24)Se(64.5) glass nanowires with realistic tolerance to fabrication errors that achieve near-zero anomalous dispersion at a 1420 nm pump wavelength. This structure has a fabrication tolerance of 80-170 nm in the waveguide width and utilizes a SiO(2)/Al(2)O(3) layer deposited by atomic layer deposition to compensate the fabrication errors in the film thickness.
authors.affiliation: Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), Research School of Physics and Engineering, The Australian National University, Canberra ACT, Australia. xga111@rsphysse.anu.edu.au
authors.forename: X
authors.initials: X
authors.lastname: Gai
authors.forename: R P
authors.initials: RP
authors.lastname: Wang
authors.forename: C
authors.initials: C
authors.lastname: Xiong
authors.forename: M J
authors.initials: MJ
authors.lastname: Steel
authors.forename: B J
authors.initials: BJ
authors.lastname: Eggleton
authors.forename: B
authors.initials: B
authors.lastname: Luther-Davies
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D001151:Arsenic / Q000737:chemistry; D004867:Equipment Design / Q000379:methods; D005857:Germanium / Q000737:chemistry; D005898:Glass / Q000737:chemistry*; D008420:Manufactured Materials; D008962:Models, Theoretical; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods; D053770:Nanowires; D055095:Optics and Photonics / Q000295:instrumentation* / Q000379:methods*; D017785:Photons; D012643:Selenium / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry
chemical_list: D005857:Germanium; D012822:Silicon Dioxide; D012643:Selenium; D000537:Aluminum Oxide; D001151:Arsenic