DataVXAdvanced Optical MaterialsPaper
journal article·2021-03Open access

Germanium‐on‐Carborundum Surface Phonon‐Polariton Infrared Metamaterial

Bo Qiang, Alexander M. Dubrovkin, Harish N. S. Krishnamoorthy, Qian Wang, Nikolay I. Zheludev, Qi Jie Wang

Advanced Optical Materials· Volume 9· Issue 5
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Source abstract

Abstract

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.
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Research context

OpenAlex topics: Thermal Radiation and Cooling Technologies · Metamaterials and Metasurfaces Applications · Plasmonic and Surface Plasmon Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Centre for Disruptive Photonic Technologies TPI SPMS Nanyang Technological University Singapore 637371 Singapore

Centre for OptoElectronics and Biophotonics School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore

Institute of Materials Research and Engineering Agency for Science, Technology and Research (A*STAR) 2 Fusionopolis Way, Innovis #08‐03 Singapore 138634 Singapore

Optoelectronics Research Centre and Centre for Photonic Metamaterials University of Southampton Southampton SO17 1BJ UK

Funding

Ministry of Education - Singapore · Agency for Science, Technology and Research · National Research Foundation Singapore · Engineering and Physical Sciences Research Council

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