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An enhanced sensitivity near-field terahertz microscope concept is presented based on surface plasmon polariton assisted tunneling through a sub-wavelength coaxial probe. A concentric metallo-dielectric coupling structure yields a field enhancement by two orders of magnitude.
In the present work we report the effect of visible (VIS) light on the conductivity of SnO2 nanobelts. The existence of visible light effect is unusual, since bulk SnO2 is a wide band gap semiconductor. Two types of nanobelt alignment/trapping methods were used in fabricating devices for study of the visible light effect. Fluid flow alignment was used for making individual nanobelt devices, while...
In the present work we report the results of AC dielectrophoresis experiments on ethanol suspended SnO2 nanobelts. AC field (frequency ~ 5 Hz - 10 MHz) was applied between microelectrodes, and detailed and direct observations of the nanobelt motion were performed. It revealed a wide variety of nanobelt motions induced by the dielectrophoretic forces, which include attraction and repulsion depending...
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