Publication: Phase-matched second-harmonic generation in core-shell nanowire hyperbolic metamaterial
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Issued Date
2022
Resource Type
Language
eng
File Type
application/pdf
ISSN
304026
Rights Holder(s)
Scopus
Bibliographic Citation
European Journal of Dentistry. Vol 16, No.2 (2022), p.339-345
Suggested Citation
Wicharn S., Banerjee P.P., Buranasiri P. Phase-matched second-harmonic generation in core-shell nanowire hyperbolic metamaterial. European Journal of Dentistry. Vol 16, No.2 (2022), p.339-345. doi:10.1016/j.ijleo.2022.169533 Retrieved from: https://hdl.handle.net/20.500.14740/9824
Author(s)
Abstract
Second-harmonic generation is well-known nonlinear frequency conversion technique, which can be applied in nonlinear optical characterization of materials and all-optical signal processing. This phenomenon requires phase-matching to maximize the conversion efficiency of generated second-harmonic field. But the phase-matching condition is difficult to achieve because of dispersion of naturally existing materials. To overcome this limitation, we propose an innovative phase-matching technique, which is called hyperbolic phase-matching, that can be possibly achieved by managing dispersion of a hyperbolic metamaterial. Here, the hyperbolic metamaterial is made of two-dimensional periodic arrays of core-shell nanowires, which have aluminium gallium arsenide as a core and gold as a shell, immersed in anodic aluminium oxide matrix. We have demonstrated phase-matched conditions for two different non-collinear second-harmonic interacting configurations in the metamaterial, which can be created by tuning incident angle of pump field to optimal values. Finally, conversion efficiencies of transmitted and reflected second-harmonic pulses as a function of incident angle and input pulse intensity were examined. The maximum conversion efficiencies are obtained at optimal incident angle and largest pumping intensity. © 2022 Elsevier GmbH