Fig. 1: Plasmon-driven movements of Au nanowires on silica microfibres.
From: Plasmon-driven nanowire actuators for on-chip manipulation
a Schematic showing movements of Au nanowires on suspended microfibres, driven by pulsed lasers with wavelengths of 532 and 1064 nm, respectively. Only the 1064 nm laser can efficiently excite SPP in the Au nanowire, thus enhancing the heating effect of absorbed light and the induced SAW drive the Au nanowire to peristaltically crawl along the silica microfibre. b Microscope image of an Au nanowire (LNW = 6.1 μm) placed on a suspended microfibre (Dfiber = 1.8 μm). Note that the nanowire axis was not strictly parallel with the microfibre axis. c Under the 532 nm laser actuation from the left side, the Au nanowire moved to the left. d Under the 1064 nm laser actuation from the left side, the Au nanowire moved to the right. The used average power of the 532 and 1064 nm pulsed lasers was about 40 μW.
