Interplay between electric and magnetic effect in adiabatic polaritonic systems

Alessandro Alabastri, Andrea Toma, Carlo Liberale, Manohar Chirumamilla, Andrea Giugni, Francesco De Angelis, Gobind Das, Enzo Di Fabrizio, Remo Proietti Zaccaria

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


We report on the possibility of realizing adiabatic compression of polaritonic wave on a metallic conical nano-structure through an oscillating electric potential (quasi dynamic regime). By comparing this result with an electromagnetic wave excitation, we were able to relate the classical lighting-rod effect to adiabatic compression. Furthermore, we show that while the magnetic contribution plays a marginal role in the formation of adiabatic compression, it provides a blue shift in the spectral region. In particular, magnetic permeability can be used as a free parameter for tuning the polaritonic resonances. The peculiar form of adiabatic compression is instead dictated by both the source and the metal permittivity. The analysis is performed by starting from a simple electrostatic system to end with the complete electromagnetic one through intermediate situations such as the quasi-electrostatic and quasi-dynamic regimes. Each configuration is defined by a particular set of equations which allows to clearly determine the individual role played by the electric and magnetic contribution in the generation of adiabatic compression. We notice that these findings can be applied for the realization of a THz nano-metric generator.

Original languageBritish English
Pages (from-to)7538-7548
Number of pages11
JournalOptics Express
Issue number6
StatePublished - 25 Mar 2013


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