http://arxiv.org/ftp/arxiv/papers/1410/1410.4413.pdf
Dynamical Casimir effect for surface plasmon polaritons V. Hizhnyakov, A. Loot, S.Ch. Azizabadi Institute of Physics, University of Tartu, Ravila 14c, 50411 Tartu, Estonia E-mail: [email protected] Abstract. Emission of photon pairs by an interface of asymmetric dielectric and thin metal film excited by a normally falling plane wave is considered. The excitation causes oscillations in time of the phase velocity of surface plasmon polaritons in the interface. This leads to the dynamical Casimir effect – the generation of pairs of surface plasmon polariton quanta, which transfer to photons outside the interface. In case of a properly chosen interface, the yield of two-photon emission may exceed that of usual spontaneous parametric down conversion. 7. Concluding remarks A theoretical consideration of the dynamical Casimir effect in a metal-dielectric interface with asymmetric dielectric is presented. It is shown that the enhancement of the field of surface plasmon polaritons in the interface may allow one to generate photon pairs with remarkable yield of the order of 6 10 or more. The efficiency of the dynamical Casimir effect in a metal-dielectric interface could be additionally enhanced a few orders of magnitude if to use a proper grating: in addition to the enhancement of the field of generated surface plasmon polaritons this would allow one to enhance the field of excitation as well. One more possibility to enhance the efficiency of the process under consideration is to surround the metallic film by layers of dielectric crystals with enhanced second order susceptibility. As examples of such crystals may serve AgGaSe2 and NiNbO3, where (2) 30 pm/V [26]. It is expected that analogous value of (2) should have chalcopyrite compounds [27]. Moreover hetero-structures with asymmetric quantum wells presumably may have (2) 400 pm/V [28]. This may allow one to additionally increase the yield of the process a few orders of magnitude. It is not excluded that the dynamical Casimir effect in metal-dielectric interfaces may allow one to achieve full conversion of incident photons to photon pairs. All those references to order of magnitude increases sound like over unity amplification of incoming photons. On Tue, Feb 9, 2016 at 11:16 AM, Jones Beene <[email protected]> wrote: > “Dynamical Casimir effect for surface plasmon polaritons” > > The title says it all, in terms of hitting on two of the significant new > catch-phrases which are cropping up in the glow-stick version of LENR, > but the paper (from Estonia) is behind a paywall… > > *http://www.sciencedirect.com/science/article/pii/S0375960114012195* > <http://www.sciencedirect.com/science/article/pii/S0375960114012195> > > Ostensibly, it would explain how the SPP can become excessively energetic > in circumstances which are relatively mundane. One message that is > emerging is that SPP formation could be gainful in itself, despite > whatever happens next. One photon going in with two coming out… provides a > mechanism for gain if the wavelength is the same. > > *Abstract* > > The emission of photon pairs by a metal–dielectric interface placed > between the mirrors of the resonator and excited by a plane wave is > considered. The excitation causes oscillations in time of the optical > length of surface plasmon polaritons in the interface. This leads to the > dynamical Casimir effect – the generation of pairs of surface plasmon > polariton quanta, which transfer to photons outside the interface. In the > case of a properly chosen interface, the yield of two-photon emission may > exceed that of the usual spontaneous parametric down-conversion. > >
