期刊
ACS PHOTONICS
卷 2, 期 2, 页码 189-193出版社
AMER CHEMICAL SOC
DOI: 10.1021/ph500431g
关键词
local density of states; radiative decay rate; near-field scanning probe; fluorescence microscopy; plasmonic nanoantennas; reciprocity theorem
类别
资金
- LABEX WIFI (Laboratory of Excellence within the French Program Investments for the Future) [ANR-10-IDEX-0001-02 PSL*]
- Region Ile-de-France in the framework of DIM Nano-K
- French National Research Agency [ANR-11-BS10-0015]
- Agence Nationale de la Recherche (ANR) [ANR-11-BS10-0015] Funding Source: Agence Nationale de la Recherche (ANR)
We present a novel Method to extract the various contributions to the photonic local density of states from near-field fluorescence maps. The approach is based on the simultaneous mapping of the fluorescence intensity and decay rate and on the rigorous application of the reciprocity theorem. It allows us to separate the contributions of the radiative and the apparent nonradiative local density of states to the change in the decay rate. The apparent nonradiative contribution accounts for fosses due to radiation out of the detection solid angle and to absorption in the environment. Data analysis relies on a new analytical calculation, and does not require the use of numerical simulations. One of the most relevant applications of the method is the characterization of nanostructures aimed at maximizing the number of photons emitted M the detection solid angle, Which is a crucial issue in modern nanophotonics.
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