Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/146758
Title: Germanium-on-carborundum surface phonon-polariton infrared metamaterial
Authors: Qiang, Bo
Dubrovkin, Alexander M.
Krishnamoorthy, Harish N. S.
Wang, Qian
Zheludev, Nikolay I.
Wang, Qi Jie
Keywords: Engineering::Nanotechnology
Issue Date: 2021
Source: Qiang, B., Dubrovkin, A. M., Krishnamoorthy, H. N. S., Wang, Q., Zheludev, N. I., & Wang, Q. J. (2021). Germanium-on-carborundum surface phonon-polariton infrared metamaterial. Advanced Optical Materials, 9(5), 2001652-. doi:10.1002/adom.202001652
Project: MOE2016-T3-1-006
MOE2018-T2-1-176
NRF-CRP18-2017-02
NRF-CRP19-2017-01
EP/M009122/1
A18A7b0058
Journal: Advanced Optical Materials
Abstract: Surface phonon-polaritons in thin layers of high-index dielectric structures are emerging as promising excitations for exploitation in high-density photonic devices. Here, a mid-infrared phononic–dielectric metamaterial, a 2D periodic array of germanium discs on silicon carbide (carborundum) is demonstrated. It is shown that the metamaterial can support sharp resonances at the free space wavelength that is at least ten times larger than lattice parameter of the array. With germanium discs of thickness 120 nm and diameter 1 µm, a metamaterial resonance at the wavelength of 11 µm is observed. A blueshift of the resonant frequency observed upon increase of the disk size is related to the anomalous dispersion of surface polaritons at germanium carborundum interface. It is argued that such surface phonon-polariton metamaterial is a promising platform for applications where enhanced homogeneity of optical response is required, such as imaging, holography, and cloaking.
URI: https://hdl.handle.net/10356/146758
ISSN: 2195-1071
DOI: 10.1002/adom.202001652
Rights: This is the peer reviewed version of the following article: Qiang, B., Dubrovkin, A. M., Krishnamoorthy, H. N. S., Wang, Q., Zheludev, N. I., & Wang, Q. J. (2021). Germanium-on-carborundum surface phonon-polariton infrared metamaterial. Advanced Optical Materials, 9(5), 2001652-. doi:10.1002/adom.202001652, which has been published in final form at https://doi.org/10.1002/adom.202001652. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: embargo_20220311
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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