Double resonant wideband Purcell effect in wire metamaterials

M. S. Mirmoosa, S. Yu Kosulnikov, C. R. Simovski

Research output: Contribution to journalArticlepeer-review


In this paper, we theoretically show that a broadband resonant enhancement of emission may occur for infrared sources located in a polaritonic wire medium. The reason for this enhancement is the overlapping of two topological transitions of the wave dispersion in the medium. The first topological transition has been revealed as an effect inherent to polaritonic wire media at a certain frequency in the mid-infrared range. This work uncovers another topological transition for such wire media which holds at a higher frequency but still in the mid infrared. We show that the first transition frequency can be shifted towards the second one by variation of the design parameters. This shift enables a broadband resonant Purcell factor. We compare the results obtained for two orientations of a subwavelength electric dipole embedded into the wire medium - that along the optical axis and that perpendicular to it - and report on the resonant isotropic radiation enhancement. Also, we reveal the enhancement of radiation to the free space from a finite sample of the wire medium.

Original languageEnglish
Article number095101
JournalJournal of Optics (United Kingdom)
Issue number9
StatePublished - Sep 2016
Externally publishedYes


  • Purcell effect
  • isofrequency surface
  • wire metamaterials


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