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Intrinsically core-shell plasmonic dielectric nanostructures with ultrahigh refractive index

Journal Article


Abstract


  • Topological insulators are a new class of quantum materials with metallic (edge) surface states and insulating bulk states. They demonstrate a variety of novel electronic and optical properties, which make them highly promising electronic, spintronic, and optoelectronicmaterials.We report on a novel conic plasmonic nanostructure that is made of bulk-insulating topological insulators and has an intrinsic core-shell formation. The insulating (dielectric) core of the nanocone displays an ultrahigh refractive index of up to 5.5 in the near-infrared frequency range. On themetallic shell, plasmonic response and strong backward light scattering were observed in the visible frequency range. Through integrating the nanocone arrays into a-Si thin film solar cells, up to 15% enhancement of light absorption was predicted in the ultraviolet and visible ranges.With these unique features, the intrinsically core-shell plasmonic nanostructure paves a new way for designing low-loss and high-performance visible to infrared optical devices.

Publication Date


  • 2016

Citation


  • Yue, Z., Cai, B., Wang, L., Wang, X., & Gu, M. (2016). Intrinsically core-shell plasmonic dielectric nanostructures with ultrahigh refractive index. Science Advances, 2(3). doi:10.1126/sciadv.1501536

Scopus Eid


  • 2-s2.0-84989265363

Volume


  • 2

Issue


  • 3

Abstract


  • Topological insulators are a new class of quantum materials with metallic (edge) surface states and insulating bulk states. They demonstrate a variety of novel electronic and optical properties, which make them highly promising electronic, spintronic, and optoelectronicmaterials.We report on a novel conic plasmonic nanostructure that is made of bulk-insulating topological insulators and has an intrinsic core-shell formation. The insulating (dielectric) core of the nanocone displays an ultrahigh refractive index of up to 5.5 in the near-infrared frequency range. On themetallic shell, plasmonic response and strong backward light scattering were observed in the visible frequency range. Through integrating the nanocone arrays into a-Si thin film solar cells, up to 15% enhancement of light absorption was predicted in the ultraviolet and visible ranges.With these unique features, the intrinsically core-shell plasmonic nanostructure paves a new way for designing low-loss and high-performance visible to infrared optical devices.

Publication Date


  • 2016

Citation


  • Yue, Z., Cai, B., Wang, L., Wang, X., & Gu, M. (2016). Intrinsically core-shell plasmonic dielectric nanostructures with ultrahigh refractive index. Science Advances, 2(3). doi:10.1126/sciadv.1501536

Scopus Eid


  • 2-s2.0-84989265363

Volume


  • 2

Issue


  • 3