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Nondestructive probing of the transport and elastic properties of nanostructured metalattices using coherent EUV beams

ORAL

Abstract

Nanoscale metamaterials exhibit engineered thermal, magnetic, and electronic properties, which are essential for nanoelectronics, thermoelectrics, and ultralight media. Nanostructured metalattices are artificial 3D solids, periodic on length scales 1-100nm, that enable the functional properties of materials to be tuned. However, characterizing such materials is extremely challenging. Here we overcome this challenge by using tabletop high harmonic extreme ultraviolet (EUV) beams, with wavelengths (≈30nm) and pulse durations (≈10fs) that are well-matched for probing nanoscale structure and function. We demonstrate nondestructive measurements of the mechanical, structural, and transport properties of complex 3D nanostructured media—specifically in metalattices made from 14-30nm silica nanosphere templates infiltrated with silicon. We extract the mechanical and structural properties from the measured acoustic dispersion, which agrees with continuum models. In contrast, the heat flow through the metalattices deviates from macroscopic models due to the nanoscale structure. These samples have not only a lower thermal conductivity than expected, but also exhibit transport properties that depend on the heat source geometry. We support these findings with advanced atomistic models.

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Presenters

  • Joshua Knobloch

    STROBE and JILA, University of Colorado, Boulder, STROBE and JILA, University of Colorado and NIST, University of Colorado, Boulder

Authors

  • Joshua Knobloch

    STROBE and JILA, University of Colorado, Boulder, STROBE and JILA, University of Colorado and NIST, University of Colorado, Boulder

  • Begoña Abad

    STROBE and JILA, University of Colorado, Boulder, STROBE and JILA, University of Colorado and NIST

  • Travis D Frazer

    STROBE and JILA, University of Colorado, Boulder, STROBE and JILA, University of Colorado and NIST

  • Brendan McBennett

    STROBE and JILA, University of Colorado, Boulder, STROBE and JILA, University of Colorado and NIST

  • Weinan Chen

    Pennsylvania State University

  • Hiu Cheng

    Pennsylvania State University

  • Alex Grede

    Pennsylvania State University

  • Nabila Nova

    Pennsylvania State University

  • Jorge Hernández-Charpak

    STROBE and JILA, University of Colorado, Boulder, STROBE and JILA, University of Colorado and NIST

  • Pratibha Mahale

    Pennsylvania State University

  • Disha Talreja

    Pennsylvania State University

  • Yihuang Xiong

    Pennsylvania State University

  • Tom Mallouk

    Pennsylvania State University

  • Noel C Giebink

    Pennsylvania State University

  • Venkatraman Gopalan

    Pennsylvania State University, Department of Materials Science and Engineering, The Pennsylvania State University, Materials Science and Engineering, Pennsylvania State University

  • Ismaila Dabo

    Pennsylvania State University, Department of Materials Science and Engineering, The Pennsylvania State University, Material Science and Engineering, Pennsylvania State University, The Pennsylvania State University

  • Vincent Crespi

    Penn State University, Pennsylvania State University

  • John Badding

    Pennsylvania State University

  • Henry Kapteyn

    JILA, University of Colorado Boulder, Department of Physics and JILA, University of Colorado, Boulder, STROBE and JILA, University of Colorado, Boulder, JILA and Department of Physics, University of Colorado, Boulder, STROBE and JILA, University of Colorado and NIST, Physics, JILA/University of Colorado Boulder, JILA, University of Colorado, Boulder, Physics and JILA, CU Boulder, JILA, University of Colorado, Boulder

  • Margaret Murnane

    JILA, University of Colorado Boulder, Department of Physics and JILA, University of Colorado, Boulder, STROBE and JILA, University of Colorado, Boulder, STROBE and JILA, University of Colorado and NIST, JILA, University of Colorado, Boulder, Physics and JILA, CU Boulder, University of Colorado, JILA, University of Colorado, Boulder