17 August 2014 Positioning of single quantum dots on nanoscale areas of metal-free substrates (presentation video)
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Abstract
We demonstrate a novel process for selective binding of single semiconductor core-shell quantum dots (QDs) to transparent all-dielectric (glass) substrates with nanoscale resolution. This is accomplished by defining a mask via electron-beam lithography (EBL) followed by functionalization of only the exposed areas of the substrate with a heterobifunctional linker, while applying a binding inhibitor to all other areas. Single QD blinking is clearly observed for several QD functionalized sites. Our approach is compatible with standard two-step EBL nanofabrication schemes and it does not rely on the presence of metals, making it suitable for coupling QDs to all-dielectric nanoresonators.
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Isabelle Staude, Varun K. Sreenivasan, Ivan Shishkin, Kirill Samusev, Manuel Decker, Dragomir N. Neshev, Andrei V. Zvyagin, Yuri S. Kivshar, "Positioning of single quantum dots on nanoscale areas of metal-free substrates (presentation video)", Proc. SPIE 9162, Active Photonic Materials VI, 91620E (17 August 2014); doi: 10.1117/12.2061436; https://doi.org/10.1117/12.2061436
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