期刊
OPTICS EXPRESS
卷 24, 期 11, 页码 1708-1715出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.24.011708
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资金
- National Natural Science Foundation of China [61101044, 61505164, 11372248]
- Fundamental Research Funds for the Central Universities [3102015ZY058, 3102015ZY079]
- Shaanxi Project for Young New Star in Science and Technology [2015KJXX-11]
- NPU Aoxiang Star Project
- National Training Programs of Innovation and Entrepreneurship for Undergraduates [201510699212, 201510699213]
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%. (C) 2016 Optical Society of America
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