Journal
NANO LETTERS
Volume 12, Issue 1, Pages 177-181Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl203270b
Keywords
Surface plasmons; single-walled carbon nanotubes; photoluminescence; radiation pattern imaging; leakage radiation microscopy
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Funding
- Nanoscience Europe (E2-Plas)
- DFG [HA4405/5-1]
- Nanosystems Initiative Munich (NIM)
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We report on the excitation of propagating surface plasmon polaritons in thin metal films by a single emitter. Upon excitation in the visible regime, individual semiconducting single-walled carbon nanotubes are shown to act as directional near-infrared point dipole sources launching propagating surface plasmons mainly along the direction of the nanotube axis. Plasmon excitation and propagation is monitored in Fourier and real space by leakage radiation microscopy and is modeled by rigorous theoretical calculations. Coupling to plasmons almost completely reshapes the emission of nanotubes both spatially and with respect to polarization as compared to photoluminescence on a dielectric substrate.
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