A Nanoscale Set-Reset Flip-Flop in Fluorescence Resonance Energy Transfer-Based Circuits

摘要

Fluorescence resonance energy transfer (FRET) is a promising method of implementing photonic circuits at a nanoscale. This letter presents a set-reset flip-flop that consists of fluorescent molecules organized by DNA hybridization. In the proposed flip-flop, the state changes according to the optical input and current state, then FRET is switched between on and off depending on its state. The experimental results demonstrate that the flip-flop can modulate the energy flow, and repeated cycle state transitions are induced.