Abstract
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.
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