Photonic antennas provide an effective approach for the light receiving with engineerable near fields and receiving gains. Various antennas such as dipole, bow-tie, circular disk, circular ring, and pointed-dipole antenna have been reported with an enhancement to infrared detection. In this paper, we report a new double-pointed optical antenna and its enhancement in the longwave infrared (LWIR, 8-12 μm or 25 tera-Hz to 37.5 tera-Hz) spectral regime. The double-pointed photonic antennas are simulated and compared with the single-pointed dipole antenna. It is found that the double-pointed photonic antennas show higher E-fields in the LWIR spectral regime for both the single antenna or coupled antenna configurations. The uncoupled double-pointed dipole antenna can be modeled as an RLC circuit, whereas the coupled double-pointed dipole antennas show clear Fano-type interference between the transmission and the discrete plasmonic resonant modes. The E-fields of the double-pointed antenna are also compared to those of the bow-tie antenna with the same gap dimension.
Double-Pointed Optical Antenna in the Longwave Infrared (LWIR) Spectral Regime
2018-07-01
1282974 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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