Metamaterial antenna integrated to LiNbO3 optical modulator for millimeter-wave-photonic links (original) (raw)

2015, 2015 International Symposium on Antennas and Propagation (ISAP)

Abstract

We report current research progress on a metamaterial antenna integrated to an optical modulator for millimeter-wave-photonic links. The metamaterial antenna is composed by an array of electric-LC resonators on a LiNbO3 optical crystal. Large millimeter-wave electric field is induced across the capacitive gaps of the resonators due to free-space millimeter-wave irradiation. Optical modulation through Pockels effects can be obtained when light propagates along the capacitive gaps. The integrated device is operated effectively by considering interaction between millimeter-wave and lightwave electric fields along the capacitive gaps. Basic operations of the integrated device for 90GHz millimeter-wave bands are reported and discussed. Optical sidebands with carrier-to-sideband ratio of about ™60dB by millimeter-wave irradiation power of ~20mW can be experimentally measured using optical spectrum analyzer.

Key takeaways

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  1. The device operates effectively at 90GHz millimeter-wave bands, integrating metamaterial antenna and optical modulator.
  2. Optical modulation using the Pockels effect is achieved with a carrier-to-sideband ratio of approximately 60dB.
  3. The metamaterial antenna is composed of electric-LC resonators on a LiNbO3 optical crystal substrate.
  4. Free-space millimeter-wave irradiation power of approximately 20mW was utilized in the experimental setup.
  5. The proposed technology enhances bandwidth for millimeter-wave-photonic links in mobile communication systems.

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