| Autor: |
Kress SJ; Optical Materials Engineering Laboratory and ‡Laboratory of Thermodynamics in Emerging Technologies, ETH Zurich , 8092 Zurich, Switzerland., Richner P, Jayanti SV, Galliker P, Kim DK, Poulikakos D, Norris DJ |
| Jazyk: |
angličtina |
| Zdroj: |
Nano letters [Nano Lett] 2014 Oct 08; Vol. 14 (10), pp. 5827-33. Date of Electronic Publication: 2014 Sep 05. |
| DOI: |
10.1021/nl5026997 |
| Abstrakt: |
Colloidal quantum-dots are bright, tunable emitters that are ideal for studying near-field quantum-optical interactions. However, their colloidal nature has hindered their facile and precise placement at desired near-field positions, particularly on the structured substrates prevalent in plasmonics. Here, we use high-resolution electro-hydrodynamic printing (<100 nm feature size) to deposit countable numbers of quantum dots on both flat and structured substrates with a few nanometer precision. We also demonstrate that the autofocusing capability of the printing method enables placement of quantum dots preferentially at plasmonic hot spots. We exploit this control and design diffraction-limited photonic and plasmonic sources with arbitrary wavelength, shape, and intensity. We show that simple far-field illumination can excite these near-field sources and generate fundamental plasmonic wave-patterns (plane and spherical waves). The ability to tailor subdiffraction sources of plasmons with quantum dots provides a complementary technique to traditional scattering approaches, offering new capabilities for nanophotonics. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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