Eight-channel reconfigurable microring filters with tunable frequency, extinction ratio and bandwidth Shen, Hao ; Khan, Maroof H. ; Fan, Li ; Zhao, Lin ; Xuan, Yi ; Ouyang, Jing ; Varghese, Leo T. ; Qi, Minghao Abstract Publication: Optics Express Pub Date: August 2010 DOI: 10.1364/OE.18.018067 Bibcode: 2010OExpr..1818067S