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Title: Tunable, Homoepitaxial Hyperbolic Metamaterials Enabled by High Mobility CdO

Abstract

We report propagating light exhibits hyperbolicity in strongly anisotropic materials where the principal components of the dielectric tensor are opposite in sign. While hyperbolicity occurs naturally in anisotropic polar dielectrics, wherein optical phonons along orthogonal crystal axes are nondegenerate, such optical anisotropy can also be engineered in hyperbolic metamaterials (HMMs): thin film superlattices of alternating dielectric and metallic layers. Contrasted with the severely limited tunability of natural hyperbolic materials, the hyperbolic behavior of HMMs can be tailored significantly both through superlattice design and material selection. However, so far HMMs have suffered from high optical losses, hindering their performance. In this report, broadly tunable (λ = 2–5 µm) Type I and II hyperbolic modes with low losses (quality (Q)-factors up to 19.7) are observed through attenuated total reflectance measurements of monolithic, homoepitaxial superlattices of high- and low-doped cadmium oxide (CdO). Further, the low losses offered by CdO enable the first demonstration of real-space imaging of hyperbolic plasmon polaritons in nanoresonators by scattering-type scanning near-field optical microscopy—previously only possible for hyperbolic phonon polariton materials. Tunable, low-loss CdO HMMs promise designability for applications such as on-chip photonics, super-resolution imaging (hyperlensing), enhanced emission, novel emitter designs, and possibly quantum nanophotonic and time variant metasurfaces.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [6];  [1]; ORCiD logo [3]; ORCiD logo [7];  [1]; ORCiD logo [4]
  1. Pennsylvania State University, University Park, PA (United States)
  2. Vanderbilt University, Nashville, TN (United States); City University of New York (CUNY), NY (United States)
  3. RWTH Aachen University (Germany)
  4. Vanderbilt University, Nashville, TN (United States)
  5. Army Research Laboratory, Research Triangle Park, NC (United States), MD (United States)
  6. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
  7. Vanderbilt University, Nashville, TN (United States); University of Iowa, Iowa City, IA (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); US Department of the Navy, Office of Naval Research (ONR); Army Research Office (ARO); Department of Defense (DoD): German Science Foundation (DFG)
OSTI Identifier:
1906601
Grant/Contract Number:  
AC05-00OR22725; N00014-22-12035; N00014-18-1-2107; W911NF-21-1-0119; W911NF-16-1-0406; TA848/7-1; SFB917
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Optical Materials
Additional Journal Information:
Journal Volume: 2202137; Journal Issue: 2202137; Journal ID: ISSN 2195-1071
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Cleri, Angela J., Nolen, J. Ryan, Wirth, Konstantin G., He, Mingze, Runnerstrom, Evan L., Kelley, Kyle P., Nordlander, Joshua, Taubner, Thomas, Folland, Thomas G., Maria, Jon‐Paul, and Caldwell, Joshua D. Tunable, Homoepitaxial Hyperbolic Metamaterials Enabled by High Mobility CdO. United States: N. p., 2022. Web. doi:10.1002/adom.202202137.
Cleri, Angela J., Nolen, J. Ryan, Wirth, Konstantin G., He, Mingze, Runnerstrom, Evan L., Kelley, Kyle P., Nordlander, Joshua, Taubner, Thomas, Folland, Thomas G., Maria, Jon‐Paul, & Caldwell, Joshua D. Tunable, Homoepitaxial Hyperbolic Metamaterials Enabled by High Mobility CdO. United States. https://doi.org/10.1002/adom.202202137
Cleri, Angela J., Nolen, J. Ryan, Wirth, Konstantin G., He, Mingze, Runnerstrom, Evan L., Kelley, Kyle P., Nordlander, Joshua, Taubner, Thomas, Folland, Thomas G., Maria, Jon‐Paul, and Caldwell, Joshua D. Wed . "Tunable, Homoepitaxial Hyperbolic Metamaterials Enabled by High Mobility CdO". United States. https://doi.org/10.1002/adom.202202137. https://www.osti.gov/servlets/purl/1906601.
@article{osti_1906601,
title = {Tunable, Homoepitaxial Hyperbolic Metamaterials Enabled by High Mobility CdO},
author = {Cleri, Angela J. and Nolen, J. Ryan and Wirth, Konstantin G. and He, Mingze and Runnerstrom, Evan L. and Kelley, Kyle P. and Nordlander, Joshua and Taubner, Thomas and Folland, Thomas G. and Maria, Jon‐Paul and Caldwell, Joshua D.},
abstractNote = {We report propagating light exhibits hyperbolicity in strongly anisotropic materials where the principal components of the dielectric tensor are opposite in sign. While hyperbolicity occurs naturally in anisotropic polar dielectrics, wherein optical phonons along orthogonal crystal axes are nondegenerate, such optical anisotropy can also be engineered in hyperbolic metamaterials (HMMs): thin film superlattices of alternating dielectric and metallic layers. Contrasted with the severely limited tunability of natural hyperbolic materials, the hyperbolic behavior of HMMs can be tailored significantly both through superlattice design and material selection. However, so far HMMs have suffered from high optical losses, hindering their performance. In this report, broadly tunable (λ = 2–5 µm) Type I and II hyperbolic modes with low losses (quality (Q)-factors up to 19.7) are observed through attenuated total reflectance measurements of monolithic, homoepitaxial superlattices of high- and low-doped cadmium oxide (CdO). Further, the low losses offered by CdO enable the first demonstration of real-space imaging of hyperbolic plasmon polaritons in nanoresonators by scattering-type scanning near-field optical microscopy—previously only possible for hyperbolic phonon polariton materials. Tunable, low-loss CdO HMMs promise designability for applications such as on-chip photonics, super-resolution imaging (hyperlensing), enhanced emission, novel emitter designs, and possibly quantum nanophotonic and time variant metasurfaces.},
doi = {10.1002/adom.202202137},
journal = {Advanced Optical Materials},
number = 2202137,
volume = 2202137,
place = {United States},
year = {Wed Nov 09 00:00:00 EST 2022},
month = {Wed Nov 09 00:00:00 EST 2022}
}

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