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.

–

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