title: Electrically tunable Fano-type resonance of an asymmetric metal wire pair.
abstract: We theoretically and experimentally investigate the electrically tunable Fano-type resonance of asymmetric metal wire pair loaded with varactor diodes. It is illustrated that Fano-type transmission spectrum with high quality factor Q appears as a result of interference between the dipole and quadrupole modes. The ohmic loss of series resistance in varactor diode makes major contribution to absorption. At the Fano-type resonance frequency, both the two metal wires exhibit the strongest electric resonance simultaneously, and the Fano-type resonance manifests a large group delay. As the bias voltage ranges from 0 V to 8 V, the Fano-type resonance frequency exhibits a prominent blueshift of 0.16 GHz and the transmission experiences a modulation with a modulation depth of 97%.
authors.forename: Quanhong
authors.initials: Q
authors.lastname: Fu
authors.forename: Fuli
authors.initials: F
authors.lastname: Zhang
authors.forename: Yuancheng
authors.initials: Y
authors.lastname: Fan
authors.forename: Xuan
authors.initials: X
authors.lastname: He
authors.forename: Tong
authors.initials: T
authors.lastname: Qiao
authors.forename: Botao
authors.initials: B
authors.lastname: Kong