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Realizing Strong Light-Matter Interactions between Single-Nanoparticle Plasmons and Molecular Excitons at Ambient Conditions

Gülis Zengin (Institutionen för teknisk fysik, Bionanofotonik) ; Martin Wersäll (Institutionen för teknisk fysik, Bionanofotonik) ; Sara Nilsson (Institutionen för teknisk fysik, Bionanofotonik) ; Tomasz Antosiewicz (Institutionen för teknisk fysik, Bionanofotonik) ; Mikael Käll (Institutionen för teknisk fysik, Bionanofotonik) ; Timur Shegai (Institutionen för teknisk fysik, Bionanofotonik)
Physical Review Letters (0031-9007). Vol. 114 (2015), 15, p. Art. no. 157401.
[Artikel, refereegranskad vetenskaplig]

Realizing strong light-matter interactions between individual two-level systems and resonating cavities in atomic and solid state systems opens up possibilities to study optical nonlinearities on a single-photon level, which can be useful for future quantum information processing networks. However, these efforts have been hampered by unfavorable experimental conditions, such as cryogenic temperatures and ultrahigh vacuum, required to study such systems and phenomena. Although several attempts to realize strong light-matter interactions at room temperature using plasmon resonances have been made, successful realizations on the single-nanoparticle level are still lacking. Here, we demonstrate the strong coupling between plasmons confined within a single silver nanoprism and excitons in molecular J aggregates at ambient conditions. Our findings show that deep subwavelength mode volumes V together with quality factors Q that are reasonably high for plasmonic nanostructures result in a strong-coupling figure of merit-Q/root V as high as similar to 6 x 10(3) mu m(-3/2), a value comparable to state-of-the-art photonic crystal and microring resonator cavities. This suggests that plasmonic nanocavities, and specifically silver nanoprisms, can be used for room temperature quantum optics.



Denna post skapades 2015-05-21. Senast ändrad 2015-12-17.
CPL Pubid: 217396

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Bionanofotonik (2007-2015)

Ämnesområden

Atom- och molekylfysik och optik
Övrig elektroteknik, elektronik och fotonik
Teknisk fysik

Chalmers infrastruktur

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