electric near-field modulations of charged deoxyribonucleic acid nucleobases

Deoxyribonucleic acid (dna) has been recently recognized as a promising material for nanophotonics due to its outstanding electro-optical tuning. here using the realistic state-of-the-art quantum mechanical calculations, we carried out a systematic theoretical study on the electric near-field modulations of charged dna nucleobases. our results underline that electrical doping (the addition or removal of an electron) produces dramatic modulations to the electric near-field enhancements in the visible spectral range. interestingly, electrical doping causes high-intensity electric near-field hotspot regions to emerge in the technologically relevant visible spectral range. our results unveil electric near-field manipulation of dna nucleobases, which might find applications in novel nanophotonic devices.