Quantum theory for plasmon-assisted local field enhancement

• We model plasmon-induced local field enhancement near gold nanoantenna.
• Bio-inspired asymmetric geometry of nanoantenna is considered.
• Three asymmetrically placed near nanoantenna detectors allow us to resolve the polarization of incoming photons.

We applied quantum theory for nonlocal response and plasmon-assisted field enhancement near a small metallic nanoscale antenna in the limit of weak incoming fields. A simple asymmetric bio-inspired design of the nanoantenna for polarization-resolved measurement is proposed. The spatial field intensity distribution was calculated for different field frequencies and polarizations. We have shown that the proposed design the antenna allows us to resolve the polarization of incoming photons.