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Title: Chemo- and Thermomechanically Configurable 3D Optical Metamaterials Constructed from Colloidal Nanocrystal Assemblies

Abstract

Nanofabrication has limited most optical metamaterials to 2D or, often with multiple patterning steps, simple 3D meta-atoms that typically have limited built-in tunability. Here, with a one-step scalable patterning process, we exploit the chemical addressability and structural adaptability of colloidal Au nanocrystal assemblies to transform 2D nanocrystal/Ti bilayers into complex, 3D-structured meta-atoms and to thermally direct their shape morphing and alter their optical properties. By tailoring the length, number, and curvature of 3D helical structures in each meta-atom, we create large-area metamaterials with chiroptical responses of as high as ~40% transmission difference between left-hand (LCP) and right-hand (RCP) circularly polarized light (ΔT = TRCP – TLCP) that are suitable for broadband circular polarizers and, upon thermally configuring their shape, switch the polarity of polarization rotation. Finally, these 3D optical metamaterials provide prototypes for low-cost, large-scale fabrication of optical metamaterials for ultrathin lenses, polarizers, and waveplates.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3];  [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. of Pennsylvania, Philadelphia, PA (United States)
  2. Univ. of Michigan, Ann Arbor, MI (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1607984
Report Number(s):
BNL-213775-2020-JAAM
Journal ID: ISSN 1936-0851
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 14; Journal Issue: 2; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 3D nanofabrication; nanoimprint; chiral metamaterials; circular dichroism (CD); plasmonics; broadband circular polarizer; nanocrystal assembly

Citation Formats

Guo, Jiacen, Kim, Ji-Young, Zhang, Mingliang, Wang, Haonan, Stein, Aaron, Murray, Christopher B., Kotov, Nicholas A., and Kagan, Cherie R.. Chemo- and Thermomechanically Configurable 3D Optical Metamaterials Constructed from Colloidal Nanocrystal Assemblies. United States: N. p., 2019. Web. https://doi.org/10.1021/acsnano.9b08452.
Guo, Jiacen, Kim, Ji-Young, Zhang, Mingliang, Wang, Haonan, Stein, Aaron, Murray, Christopher B., Kotov, Nicholas A., & Kagan, Cherie R.. Chemo- and Thermomechanically Configurable 3D Optical Metamaterials Constructed from Colloidal Nanocrystal Assemblies. United States. https://doi.org/10.1021/acsnano.9b08452
Guo, Jiacen, Kim, Ji-Young, Zhang, Mingliang, Wang, Haonan, Stein, Aaron, Murray, Christopher B., Kotov, Nicholas A., and Kagan, Cherie R.. Thu . "Chemo- and Thermomechanically Configurable 3D Optical Metamaterials Constructed from Colloidal Nanocrystal Assemblies". United States. https://doi.org/10.1021/acsnano.9b08452. https://www.osti.gov/servlets/purl/1607984.
@article{osti_1607984,
title = {Chemo- and Thermomechanically Configurable 3D Optical Metamaterials Constructed from Colloidal Nanocrystal Assemblies},
author = {Guo, Jiacen and Kim, Ji-Young and Zhang, Mingliang and Wang, Haonan and Stein, Aaron and Murray, Christopher B. and Kotov, Nicholas A. and Kagan, Cherie R.},
abstractNote = {Nanofabrication has limited most optical metamaterials to 2D or, often with multiple patterning steps, simple 3D meta-atoms that typically have limited built-in tunability. Here, with a one-step scalable patterning process, we exploit the chemical addressability and structural adaptability of colloidal Au nanocrystal assemblies to transform 2D nanocrystal/Ti bilayers into complex, 3D-structured meta-atoms and to thermally direct their shape morphing and alter their optical properties. By tailoring the length, number, and curvature of 3D helical structures in each meta-atom, we create large-area metamaterials with chiroptical responses of as high as ~40% transmission difference between left-hand (LCP) and right-hand (RCP) circularly polarized light (ΔT = TRCP – TLCP) that are suitable for broadband circular polarizers and, upon thermally configuring their shape, switch the polarity of polarization rotation. Finally, these 3D optical metamaterials provide prototypes for low-cost, large-scale fabrication of optical metamaterials for ultrathin lenses, polarizers, and waveplates.},
doi = {10.1021/acsnano.9b08452},
journal = {ACS Nano},
number = 2,
volume = 14,
place = {United States},
year = {2019},
month = {12}
}

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