By Anatoly Zayats
Publication Date: 2013-07-15
Number of Pages: 336
This ebook, edited through of the main revered researchers in plasmonics, provides an summary of the present nation in plasmonics and plasmonic-based metamaterials, with an emphasis on energetic functionalities and a watch to destiny advancements. This publication is multifunctional, beneficial for novices and scientists attracted to purposes of plasmonics and metamaterials in addition to for confirmed researchers during this multidisciplinary region.
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Additional info for Active Plasmonics and Tuneable Plasmonic Metamaterials
4f. Note that for the system under consideration, there is a 20 meV red shift of the gain medium fluorescence with respect to the SP line center. It is chosen Quantum Theory of Spaser 17 so as to illustrate the spectral walk-off of the spaser line. For 1% in the excitation rate above the threshold of the spasing [panel (d)], a broad spasing line (red color) appears comparable in intensity to the SP-enhanced spontaneous fluorescence line (blue color). The width of this spasing line is approximately the same as of the fluorescence, but its position is shifted appreciably (spectral walk-off) toward the isolated gain medium line (green color).
Consequently, the influx and outflow of energy balance each other. Thus, selecting a metamaterial slab instead of an infinite crystal will not affect the loss and its compensation. We will denote the local field at a point r inside this metamaterial as e(r, ω) = −∇ϕ(r, ω). 36) for r belonging to the surface S of the slab under consideration. To present our results in a closed form, we first derive a homogenization formula used in Reference 85 (see also references cited therein). 37) V where ε(r, ω) is a position-dependent permittivity.
20). 5h. When the initial SP population exceeds the critical one of Nn = 1 (the blue, green, and red curves), the spaser responds with generating a short (duration less than 100 fs) pulse of the SP population (and the corresponding local fields) within a time 100 fs [panel (g)]. Simultaneously, the inversion is rapidly (within ∼ 100 fs) exhausted [panel (h)]. 5g. The corresponding inversion decays in this case almost exponentially with a characteristic time ∼ 1 ps determined by the enhanced energy transfer to the SP mode in the metal—see the corresponding curves in panel (h).