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Physics Discovery in Nanoplasmonic Systems via Autonomous Experiments in Scanning Transmission Electron Microscopy

Journal Article · · Advanced Science
 [1];  [2];  [3]
  1. Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USA
  2. Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USA, Department of Materials Science and Engineering University of Tennessee Knoxville TN 37916 USA
  3. Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USA, Computational Sciences and Engineering Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA

Abstract

Physics‐driven discovery in an autonomous experiment has emerged as a dream application of machine learning in physical sciences. Here, this work develops and experimentally implements a deep kernel learning (DKL) workflow combining the correlative prediction of the target functional response and its uncertainty from the structure, and physics‐based selection of acquisition function, which autonomously guides the navigation of the image space. Compared to classical Bayesian optimization (BO) methods, this approach allows to capture the complex spatial features present in the images of realistic materials, and dynamically learn structure–property relationships. In combination with the flexible scalarizer function that allows to ascribe the degree of physical interest to predicted spectra, this enables physical discovery in automated experiment. Here, this approach is illustrated for nanoplasmonic studies of nanoparticles and experimentally implemented in a truly autonomous fashion for bulk‐ and edge plasmon discovery in MnPS 3 , a lesser‐known beam‐sensitive layered 2D material. This approach is universal, can be directly used as‐is with any specimen, and is expected to be applicable to any probe‐based microscopic techniques including other STEM modalities, scanning probe microscopies, chemical, and optical imaging.

Sponsoring Organization:
USDOE
OSTI ID:
1897253
Alternate ID(s):
OSTI ID: 1897254
OSTI ID: 1901667
Journal Information:
Advanced Science, Journal Name: Advanced Science Journal Issue: 36 Vol. 9; ISSN 2198-3844
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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