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Title: Dynamically Reconfigurable Metadevice Employing Nanostructured Phase-Change Materials

Mastering dynamic free-space spectral control and modulation in the near-infrared (NIR) and optical regimes remains a challenging task that is hindered by the available functional materials at high frequencies. In this work, we have realized an efficient metadevice capable of spectral control by minimizing the thermal mass of a vanadium dioxide phase-change material (PCM) and placing the PCM at the feed gap of a bow-tie field antenna. The device has an experimentally measured tuning range of up to 360 nm in the NIR and a modulation depth of 33% at the resonant wavelength. The metadevice is configured for integrated and local heating, leading to faster switching and more precise spatial control compared with devices based on phase-change thin films. We envisage that the combined advantages of this device will open new opportunities for signal processing, memory, security, and holography at optical frequencies.
Authors:
 [1] ; ORCiD logo [2] ;  [1] ; ORCiD logo [1]
  1. Vanderbilt Univ., Nashville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 17; Journal Issue: 8; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING
OSTI Identifier:
1394438

Zhu, Zhihua, Evans, Philip G., Haglund, Richard F., and Valentine, Jason G.. Dynamically Reconfigurable Metadevice Employing Nanostructured Phase-Change Materials. United States: N. p., Web. doi:10.1021/acs.nanolett.7b01767.
Zhu, Zhihua, Evans, Philip G., Haglund, Richard F., & Valentine, Jason G.. Dynamically Reconfigurable Metadevice Employing Nanostructured Phase-Change Materials. United States. doi:10.1021/acs.nanolett.7b01767.
Zhu, Zhihua, Evans, Philip G., Haglund, Richard F., and Valentine, Jason G.. 2017. "Dynamically Reconfigurable Metadevice Employing Nanostructured Phase-Change Materials". United States. doi:10.1021/acs.nanolett.7b01767. https://www.osti.gov/servlets/purl/1394438.
@article{osti_1394438,
title = {Dynamically Reconfigurable Metadevice Employing Nanostructured Phase-Change Materials},
author = {Zhu, Zhihua and Evans, Philip G. and Haglund, Richard F. and Valentine, Jason G.},
abstractNote = {Mastering dynamic free-space spectral control and modulation in the near-infrared (NIR) and optical regimes remains a challenging task that is hindered by the available functional materials at high frequencies. In this work, we have realized an efficient metadevice capable of spectral control by minimizing the thermal mass of a vanadium dioxide phase-change material (PCM) and placing the PCM at the feed gap of a bow-tie field antenna. The device has an experimentally measured tuning range of up to 360 nm in the NIR and a modulation depth of 33% at the resonant wavelength. The metadevice is configured for integrated and local heating, leading to faster switching and more precise spatial control compared with devices based on phase-change thin films. We envisage that the combined advantages of this device will open new opportunities for signal processing, memory, security, and holography at optical frequencies.},
doi = {10.1021/acs.nanolett.7b01767},
journal = {Nano Letters},
number = 8,
volume = 17,
place = {United States},
year = {2017},
month = {7}
}