Reversible-Remote Control of Fluorescence by Optical Force on Black Silicon (IMAGE)
Caption
We propose a novel approach to fluorescence colour control using optical tweezers. We demonstrate an optical trapping technique using nanotextured Si. By increasing the laser intensity, the local concentration of perylene-labelled polymer chains increased. Accordingly, the excimer fluorescence of perylene increased while the monomer fluorescence decreased, evidenced by a fluorescence colour change from blue to orange. In this way, we succeeded in remote and reversible control of fluorescence colour with variation of blue, green, yellow-green, yellow, and orange colour.
Credit
Yasuyuki Tsuboi
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