title: Double-layer Fano resonance photonic crystal filters.
abstract: We report ultra-compact surface-normal high-Q optical filters based on single- and double-layer stacked Fano resonance photonic crystal slabs on both Si and quartz substrates. A single layer photonic crystal filter was designed and a Q factor of 1,737 was obtained with 23 dB extinction ratio. With stacked double-layer photonic crystal configuration, the optical filter Q can increase to over 10,000,000 in design. Double-layer filters with quality factor of 9,734 and extinction ratio of 8 dB were experimentally demonstrated, for a filter design with target Q of 22,000.
authors.forename: Yichen
authors.initials: Y
authors.lastname: Shuai
authors.forename: Deyin
authors.initials: D
authors.lastname: Zhao
authors.forename: Zhaobing
authors.initials: Z
authors.lastname: Tian
authors.forename: Jung-Hun
authors.initials: JH
authors.lastname: Seo
authors.forename: David V
authors.initials: DV
authors.lastname: Plant
authors.forename: Zhenqiang
authors.initials: Z
authors.lastname: Ma
authors.forename: Shanhui
authors.initials: S
authors.lastname: Fan
authors.forename: Weidong
authors.initials: W
authors.lastname: Zhou