| 研究実績の概要 |
In this project, an optical trapping setup based on inverted microscope was used for investigating the optical properties of certain quantum emitters. The setup was modified by adding a picosecond laser for the excitation of the nanoparticles. The picosecond laser had a tunable wavelength from 480 nm to 750 nm and could serve our needs for exciting various quantum emitters with different absorption wavelengths. For collecting the emission from the emitters, we also added a part based on a telescope guiding the emitted light towards a multi-mode fiber that was connected to a spectrometer for the emission wavelength monitoring. We tested the proof of concept by depositing fluorescent nanoparticles on a glass slide, and placing it on the microscope holder. The excitation wavelength was tuned at 500 nm and the emission wavelength was measured at 570, in agreement with the specifications, therefore we have also been using this particles for calibrating the spectrometer. The main achievement of this project was the establishment of an experimental setup for simultaneous single-particle trapping on metamaterial plasmonic tweezers and fluorescence excitation of the trapped quantum emitters.
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