Photonic Switching of DNA’s Position That Represents the Internal State in Photonic DNA Automaton
Optical computing promises spatially parallel information processing, but the diffraction phenomenon prevents us from performing computations at a nanometer scale. To overcome the problem, the idea of DNA computing is useful because it offers methods for manipulating information at that scale. We have been studying on photonic DNA automaton, which is an implementation of automaton using light and DNA as information carriers. The internal state of the automaton is represented by the position of a specific DNA in a DNA nano-structure, and the state transition is executed by changing the position in the structure in accordance with photonic signals. In this paper, we describe a photonic switch of the position of a DNA strand in a DNA nano-structure by photonic control of other DNAs. The position is controlled through conformation-change of a pair of hairpin-DNAs that are responsive to visible and UV light irradiation. Experimental results show that the position of the DNA switches to the two position in response to visible and UV light. The method is applicable to state-transition of the photonic DNA automaton.
KeywordsLight Irradiation Optical Signal Reaction Scheme Visible Light Irradiation Input Symbol
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