Enhanced Kerr nonlinearity in sub-wavelength diameter As_2Se_3 chalcogenide fiber tapers Mägi, E. C. ; Fu, L. B. ; Nguyen, H. C. ; Lamont, M. R. ; Yeom, D. I. ; Eggleton, B. J. Abstract Publication: Optics Express Pub Date: August 2007 DOI: 10.1364/OE.15.010324 Bibcode: 2007OExpr..1510324M