Abstract
In this chapter we investigate the coupling of quantum emitters and other local probes to plasmonic nanoparticles. We shall find it convenient to introduce the concept of a photonic local density of states (LDOS), which is a measure of how efficiently an oscillator transfers energy to its environment. In later parts of this chapter we will also discuss surface-enhanced Raman spectroscopy (SERS) and electron energy loss spectroscopy (EELS), which play important roles in the fields of nano optics and plasmonics. This chapter combines many of the concepts introduced in previous chapters, including Green’s functions, stratified media, and particle plasmons. Our analysis will be based on the framework of classical electrodynamics, but we will show in later parts of this book that the results only need to be slightly adapted to account for quantum effects.
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Notes
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Initially I thought that the breakthrough was only possible with the new generation of electron microscopes, but as Mathieu Kociak, one of the authors of these papers, explains this is not correct: “Actually, both [electron microscopes] were already extremely old (VG machines, 35 years old at that time!). The key in both work was data processing (PCA for Michel, deconvolution for us). Then only the works were reproduced with new generations of microscopes, which, indeed, unleashed the EELS-plasmonic beast.”
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Hohenester, U. (2020). Photonic Local Density of States. In: Nano and Quantum Optics. Graduate Texts in Physics. Springer, Cham. https://doi.org/10.1007/978-3-030-30504-8_10
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