Large single-molecule fluorescence enhancements produced by a bowtie nanoantenna Export

@article{citeulike:5971434, abstract = {Owing to the size mismatch between light and nanoscale objects such as single molecules, it is important to be able to control light–molecule interactions1, 2, 3, 4. Plasmonic nanoantennas create highly enhanced local fields when pumped resonantly, leading to increased Raman scattering5, but whether fluorescence enhancement occurs depends upon a variety of factors. Although sharp metal tips6 and colloids7, 8 can enhance fluorescence, the highly enhanced optical fields of lithographically fabricated bowtie nanoantennas9 provide a structure that is more controllable and amenable to integration. Using gold bowties, we observe enhancements of a single molecule's fluorescence up to a factor of 1,340, ten times higher than reported previously7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22. Electromagnetic simulations reveal that this is a result of greatly enhanced absorption and an increased radiative emission rate, leading to enhancement of the intrinsic quantum efficiency by an estimated factor of nine, despite additional non-radiative ohmic effects. Bowtie nanoantennas thus show great potential for high-contrast selection of single nanoemitters.}, author = {Kinkhabwala, Anika and Yu, Zongfu and Fan, Shanhui and Avlasevich, Yuri and Mullen, Klaus and Moerner, W. E.}, citeulike-article-id = {5971434}, citeulike-linkout-0 = {http://dx.doi.org/10.1038/nphoton.2009.187}, citeulike-linkout-1 = {http://dx.doi.org/10.1038/nphoton.2009.187}, citeulike-linkout-2 = {http://www.nature.com/nphoton/journal/vaop/ncurrent/pdf/nphoton.2009.187.pdf}, day = {18}, doi = {10.1038/nphoton.2009.187}, issn = {1749-4885}, journal = {Nature Photonics}, keywords = {molecule, plasmon}, month = {October}, number = {11}, pages = {654--657}, posted-at = {2009-11-03 04:54:17}, priority = {2}, publisher = {Nature Publishing Group}, title = {Large single-molecule fluorescence enhancements produced by a bowtie nanoantenna}, url = {http://dx.doi.org/10.1038/nphoton.2009.187}, volume = {3}, year = {2009} }

TY - JOUR ID - citeulike:5971434 L3 - citeulike-article-id:5971434 N2 - Owing to the size mismatch between light and nanoscale objects such as single molecules, it is important to be able to control light–molecule interactions1, 2, 3, 4. Plasmonic nanoantennas create highly enhanced local fields when pumped resonantly, leading to increased Raman scattering5, but whether fluorescence enhancement occurs depends upon a variety of factors. Although sharp metal tips6 and colloids7, 8 can enhance fluorescence, the highly enhanced optical fields of lithographically fabricated bowtie nanoantennas9 provide a structure that is more controllable and amenable to integration. Using gold bowties, we observe enhancements of a single molecule's fluorescence up to a factor of 1,340, ten times higher than reported previously7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22. Electromagnetic simulations reveal that this is a result of greatly enhanced absorption and an increased radiative emission rate, leading to enhancement of the intrinsic quantum efficiency by an estimated factor of nine, despite additional non-radiative ohmic effects. Bowtie nanoantennas thus show great potential for high-contrast selection of single nanoemitters. IS - 11 JF - Nature Photonics SN - 1749-4885 EP - 657 TI - Large single-molecule fluorescence enhancements produced by a bowtie nanoantenna PB - Nature Publishing Group VL - 3 SP - 654 KW - molecule KW - plasmon AU - Kinkhabwala, Anika AU - Yu, Zongfu AU - Fan, Shanhui AU - Avlasevich, Yuri AU - Mullen, Klaus AU - Moerner, WE PY - 2009/10/18/ UR - http://dx.doi.org/10.1038/nphoton.2009.187 ER -