All-dielectric nanotweezers for trapping and observation of a single quantum dot
Zhe Xu, Kenneth B Crozier
OPTICS EXPRESS | OPTICAL SOC AMER | Published : 2019
We report the optical trapping of a single streptavidin-coated CdSe/ZnS quantum dot whose overall diameter is around 15-20 nm, in a microfluidic chamber by an all-dielectric (silicon) nanotweezer with negligible local heating. The use of fluorescence microscopy allows us to readily observe trapping events, tracking the fluorescence emission from, and the position of, each individual trapped quantum dot as a function of time. The blinking behavior of the quantum dots is observed during the trapping process, that is, in the near field region of the silicon nanoantenna. We furthermore show that the continuous wave infrared laser employed to trap the quantum dots can also excite photoluminescenc..View full abstract
Related Projects (3)
Awarded by Australian Research Council
Australian Research Council (DP150103736, DP180104141, and FT140100577); Victorian Endowment for Science, Knowledge and Innovation (VESKI); Laby Foundation.