Optical Trapping and Two-Photon Excitation of Colloidal Quantum Dots Using Bowtie Apertures

Optical Trapping and Two-Photon Excitation of Colloidal Quantum Dots Using Bowtie Apertures

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/cm2...

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Veröffentlicht in:ACS photonics 2016-03, Vol.3 (3), p.423-427
Hauptverfasser: Jensen, Russell A, Huang, I-Chun, Chen, Ou, Choy, Jennifer T, Bischof, Thomas S, Lončar, Marko, Bawendi, Moungi G
Format: Artikel
Sprache:eng
Schlagworte:
solar (photovoltaic), solid state lighting, photosynthesis (natural and artificial), charge transport, optics, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable processing)
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Zusammenfassung: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/cm2 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.
ISSN:2330-4022
2330-4022
DOI:10.1021/acsphotonics.5b00575