Hyperbolic phonon polaritons have recently attracted considerable attention in nanophotonics mostly due to their intrinsic strong electromagnetic field confinement, ultraslow polariton group velocities, and long lifetimes. Here we introduce tin oxide (SnO 2 ) nanobelts as a photonic platform for the transport of surface and volume phonon polaritons in the mid- to far-infrared frequency range. This report brings a comprehensive description of the polaritonic properties of SnO 2 as a nanometer-sized dielectric and also as an engineered material in the form of a waveguide. By combining accelerator-based IR-THz sources (synchrotron and free-electron laser) with s-SNOM, we employed nanoscale far-infrared hyper-spectral-imaging to uncover a Fabry–Perot cavity mechanism in SnO 2 nanobelts via direct detection of phonon-polariton standing waves. Our experimental findings are accurately supported by notable convergence between theory and numerical simulations. Thus, the SnO 2 is confirmed as a natural hyperbolic material with unique photonic properties essential for future applications involving subdiffractional light traffic and detection in the far-infrared range.
Feres, Flávio H., et al. "Sub-diffractional cavity modes of terahertz hyperbolic phonon polaritons in tin oxide." Nature Communications, vol. 12, no. 1, Mar. 2021. https://doi.org/10.1038/s41467-021-22209-w
Feres, Flávio H., Mayer, Rafael A., Wehmeier, Lukas, Maia, Francisco C. B., Viana, E. R., Malachias, Angelo, Bechtel, Hans A., Klopf, J. Michael, Eng, Lukas M., Kehr, Susanne C., González, J. C., Freitas, Raul O., & Barcelos, Ingrid D. (2021). Sub-diffractional cavity modes of terahertz hyperbolic phonon polaritons in tin oxide. Nature Communications, 12(1). https://doi.org/10.1038/s41467-021-22209-w
Feres, Flávio H., Mayer, Rafael A., Wehmeier, Lukas, et al., "Sub-diffractional cavity modes of terahertz hyperbolic phonon polaritons in tin oxide," Nature Communications 12, no. 1 (2021), https://doi.org/10.1038/s41467-021-22209-w
@article{osti_1773527,
author = {Feres, Flávio H. and Mayer, Rafael A. and Wehmeier, Lukas and Maia, Francisco C. B. and Viana, E. R. and Malachias, Angelo and Bechtel, Hans A. and Klopf, J. Michael and Eng, Lukas M. and Kehr, Susanne C. and others},
title = {Sub-diffractional cavity modes of terahertz hyperbolic phonon polaritons in tin oxide},
annote = {Abstract Hyperbolic phonon polaritons have recently attracted considerable attention in nanophotonics mostly due to their intrinsic strong electromagnetic field confinement, ultraslow polariton group velocities, and long lifetimes. Here we introduce tin oxide (SnO 2 ) nanobelts as a photonic platform for the transport of surface and volume phonon polaritons in the mid- to far-infrared frequency range. This report brings a comprehensive description of the polaritonic properties of SnO 2 as a nanometer-sized dielectric and also as an engineered material in the form of a waveguide. By combining accelerator-based IR-THz sources (synchrotron and free-electron laser) with s-SNOM, we employed nanoscale far-infrared hyper-spectral-imaging to uncover a Fabry–Perot cavity mechanism in SnO 2 nanobelts via direct detection of phonon-polariton standing waves. Our experimental findings are accurately supported by notable convergence between theory and numerical simulations. Thus, the SnO 2 is confirmed as a natural hyperbolic material with unique photonic properties essential for future applications involving subdiffractional light traffic and detection in the far-infrared range. },
doi = {10.1038/s41467-021-22209-w},
url = {https://www.osti.gov/biblio/1773527},
journal = {Nature Communications},
issn = {ISSN 2041-1723},
number = {1},
volume = {12},
place = {United Kingdom},
publisher = {Nature Publishing Group},
year = {2021},
month = {03}}
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
BMBF; USDOE; USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2018), 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)https://doi.org/10.1109/IRMMW-THz.2018.8510402