Optical Trapping and Two-Photon Excitation of Colloidal Quantum Dots Using Bowtie Apertures
نویسندگان
چکیده
We demonstrate bowtie apertures that were designed and fabricated by a lift-off process to optically trap individual, 30 nm, silica-coated quantum dots (scQD). Simulations and experiments confirm the trapping capability of the system with a relatively low continuous wave trapping flux of 1.56 MW/cm at 1064 nm. Additionally, the scQD emits upon trapping via two-photon excitation from the trapping laser due to strong field enhancement inside the aperture. This system is an exciting platform for studying light−matter interactions and mulitphoton processes in single emitters.
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تاریخ انتشار 2016