Engineered Unidirectional Scattering in Metal Wire Networks for Ultrahigh Glass-Like Transparency

Yoon Jong Moon, Sang Woo Kim, Hyeon Seok An, Jin Young Na, Young Bin Kim, Ji Hyun Kim, Jang Ung Park, Sun Kyung Kim

Research output: Contribution to journalArticle

Abstract

Wavelength-scale objects usually diffuse incident light into all directions, thereby resulting in a low transmittance accompanied by a thick haze. The degradation of visibility remains a more challenging problem for metal nanostructures due to the excitation of localized surface plasmon resonances, which impedes their practical use in display applications. Here, we report a broadband, polarization- and angle-independent near-unity transmittance from a network of submicron Ag wires via the suppression of backward scattering. Electromagnetic simulations on a single Ag wire predicted that a conformal, dielectric shell suppresses backward scattering while only boosting the zeroth-order forward scattering. A facile oxidation process on electrospun Ag wires produced Ag/Ag2O core/shell wires randomly dispersed on a glass substrate. Measurements of spatially (1.5 × 1.5 cm2) and spectrally (λ = 480-880 nm) averaged transmittance revealed that Ag/Ag2O wires (with an Ag filling ratio of 3.4%) recorded a transmittance of approximately 99%, relative to a bare glass substrate. A dark-field microscope equipped with a spectrometer quantified the level of the suppressed backward scattering in Ag/Ag2O wires. The scattering engineering technique presented herein will be essential to developing metal particle or wire embedded dielectric films that act as high-transmittance specular surfaces.

Original languageEnglish
Pages (from-to)4270-4276
Number of pages7
JournalACS Photonics
Volume5
Issue number11
DOIs
Publication statusPublished - 2018 Nov 21

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

Moon, Y. J., Kim, S. W., An, H. S., Na, J. Y., Kim, Y. B., Kim, J. H., Park, J. U., & Kim, S. K. (2018). Engineered Unidirectional Scattering in Metal Wire Networks for Ultrahigh Glass-Like Transparency. ACS Photonics, 5(11), 4270-4276. https://doi.org/10.1021/acsphotonics.8b01168