The origin of second harmonic generation hotspots in chiral optical metamaterials [Invited]

V. K. Valev, X. Zheng, C. G. Biris, A. V. Silhanek, V. Volskiy, B. De Clercq, O. A. Aktsipetrov, M. Ameloot, N. C. Panoiu, G. A E Vandenbosch, V. V. Moshchalkov

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

Novel ways to detect the handedness in chiral optical metamaterials by means of the second harmonic generation (SHG) process have recently been proposed. However, the precise origin of the SHG emission has yet to be unambiguously established. In this paper, we present computational simulations of both the electric currents and the electromagnetic fields in chiral planar metamaterials, at the fundamental frequency (FF), and discuss the implications of our results on the characteristics of experimentally measured SHG. In particular, we show that the results of our numerical simulations are in good agreement with the experimental mapping of SHG sources. Thus, the SHG in these metamaterials can be attributed to a strong local enhancement of the electromagnetic fields at the FF, which depends on the particular structure of the patterned metamaterial.

Original languageEnglish
Pages (from-to)36-45
Number of pages10
JournalOptical Materials Express
Volume1
Issue number1
DOIs
Publication statusPublished - 1 May 2011

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