title: Resolving stable axial trapping points of nanowires in an optical tweezers using photoluminescence mapping.
abstract: Axially resolved microphotoluminescence mapping of semiconductor nanowires held in an optical tweezers reveals important new experimental information regarding equilibrium trapping points and trapping stability of high aspect ratio nanostructures. In this study, holographic optical tweezers are used to scan trapped InP nanowires along the beam direction with respect to a fixed excitation source and the luminescent properties are recorded. It is observed that nanowires with lengths on the range of 3-15 μm are stably trapped near the tip of the wire with the long segment positioned below the focus in an inverted trapping configuration. Through the use of trap multiplexing we investigate the possibility of improving the axial stability of the trapped nanowires. Our results have important implication for applications of optically assisted nanowire assembly and optical tweezers based scanning probes microscopy.
authors: School of Physics, The University of New South Wales, Sydney NSW 2052, Australia.
authors: Fan
authors: F
authors: Wang
authors: Wen Jun
authors: WJ
authors: Toe
authors: Woei Ming
authors: WM
authors: Lee
authors: David
authors: D
authors: McGloin
authors: Qiang
authors: Q
authors: Gao
authors: Hark Hoe
authors: HH
authors: Tan
authors: Chennupati
authors: C
authors: Jagadish
authors: Peter J
authors: PJ
authors: Reece