Abstract:
:Plasmonics now delivers sensors capable of detecting single molecules. The emission enhancements and nanometer-scale optical confinement achieved by these metallic nanostructures vastly increase spectroscopic sensitivity, enabling real-time tracking. However, the interaction of light with such nanostructures typically loses all information about the spatial location of molecules within a plasmonic hot spot. Here, we show that ultrathin plasmonic nanogaps support complete mode sets which strongly influence the far-field emission patterns of embedded emitters and allow the reconstruction of dipole positions with 1-nm precision. Emitters in different locations radiate spots, rings, and askew halo images, arising from interference of 2 radiating antenna modes differently coupling light out of the nanogap, highlighting the imaging potential of these plasmonic "crystal balls." Emitters at the center are now found to live indefinitely, because they radiate so rapidly.
journal_name
Proc Natl Acad Sci U S Aauthors
Horton MJ,Ojambati OS,Chikkaraddy R,Deacon WM,Kongsuwan N,Demetriadou A,Hess O,Baumberg JJdoi
10.1073/pnas.1914713117subject
Has Abstractpub_date
2020-02-04 00:00:00pages
2275-2281issue
5eissn
0027-8424issn
1091-6490pii
1914713117journal_volume
117pub_type
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