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

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• 作者：Russell A. Jensen ; I-Chun Huang ; Ou Chen ; Jennifer T. Choy ; Thomas S. Bischof ; Marko Lončar ; Moungi G. Bawendi
• 刊名：ACS Photonics
• 出版年：2016
• 出版时间：March 16, 2016
• 年：2016
• 卷：3
• 期：3
• 页码：423-427
• 全文大小：499K
• ISSN：2330-4022

文摘

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.