Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP (Brazil). Brazilian Synchrotron Light Laboratory (LNLS)
Universidade Federal de Mato Grosso do Sul (UFMS), Campo Grande (Brazil)
Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP (Brazil). Brazilian Synchrotron Light Laboratory (LNLS); Univ. of Campinas (UNICAMP), Sao Paulo (Brazil)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
The exploitation of phonon–polaritons in nanostructured materials offers a pathway to manipulate infrared (IR) light for nanophotonic applications. Notably, hyperbolic phonon–polaritons (HP2) in polar bidimensional crystals have been used to demonstrate strong electromagnetic field confinement, ultraslow group velocities, and long lifetimes (up to ~12 ps). Here we present nanobelts of α-phase molybdenum trioxide (α-MoO3) as a low-dimensional medium supporting HP2 modes in the mid- and far-IR ranges. Through real-space nanoimaging techniques with synchrotron and tunable laser IR light, we observe HP2 Fabry-Perot resonances that demonstrate distinct anisotropic propagation and frequency dependence. We remark an anisotropic propagation that critically depends on the frequency range. Our findings are supported by the convergence of experiment, theory, and numerical simulations. Our work shows that the low dimensionality of natural nanostructured crystals, like α-MoO3 nanobelts, provides an attractive platform to study polaritonic light–matter interactions and offers appealing cavity properties that could be harnessed in future designs of compact nanophotonic devices.
Barcelos, Ingrid D., et al. "Ultrabroadband Nanocavity of Hyperbolic Phonon–Polaritons in 1D-Like α-MoO<sub>3</sub>." ACS Photonics, vol. 8, no. 10, Sep. 2021. https://doi.org/10.1021/acsphotonics.1c00955
Barcelos, Ingrid D., Canassa, Thalita A., Mayer, Rafael A., Feres, Flavio H., de Oliveira, Eynara G., Goncalves, Alem-Mar B., Bechtel, Hans A., Freitas, Raul O., Maia, Francisco B., & Alves, Diego B. (2021). Ultrabroadband Nanocavity of Hyperbolic Phonon–Polaritons in 1D-Like α-MoO<sub>3</sub>. ACS Photonics, 8(10). https://doi.org/10.1021/acsphotonics.1c00955
Barcelos, Ingrid D., Canassa, Thalita A., Mayer, Rafael A., et al., "Ultrabroadband Nanocavity of Hyperbolic Phonon–Polaritons in 1D-Like α-MoO<sub>3</sub>," ACS Photonics 8, no. 10 (2021), https://doi.org/10.1021/acsphotonics.1c00955
@article{osti_1834589,
author = {Barcelos, Ingrid D. and Canassa, Thalita A. and Mayer, Rafael A. and Feres, Flavio H. and de Oliveira, Eynara G. and Goncalves, Alem-Mar B. and Bechtel, Hans A. and Freitas, Raul O. and Maia, Francisco B. and Alves, Diego B.},
title = {Ultrabroadband Nanocavity of Hyperbolic Phonon–Polaritons in 1D-Like α-MoO<sub>3</sub>},
annote = {The exploitation of phonon–polaritons in nanostructured materials offers a pathway to manipulate infrared (IR) light for nanophotonic applications. Notably, hyperbolic phonon–polaritons (HP2) in polar bidimensional crystals have been used to demonstrate strong electromagnetic field confinement, ultraslow group velocities, and long lifetimes (up to ~12 ps). Here we present nanobelts of α-phase molybdenum trioxide (α-MoO3) as a low-dimensional medium supporting HP2 modes in the mid- and far-IR ranges. Through real-space nanoimaging techniques with synchrotron and tunable laser IR light, we observe HP2 Fabry-Perot resonances that demonstrate distinct anisotropic propagation and frequency dependence. We remark an anisotropic propagation that critically depends on the frequency range. Our findings are supported by the convergence of experiment, theory, and numerical simulations. Our work shows that the low dimensionality of natural nanostructured crystals, like α-MoO3 nanobelts, provides an attractive platform to study polaritonic light–matter interactions and offers appealing cavity properties that could be harnessed in future designs of compact nanophotonic devices.},
doi = {10.1021/acsphotonics.1c00955},
url = {https://www.osti.gov/biblio/1834589},
journal = {ACS Photonics},
issn = {ISSN 2330-4022},
number = {10},
volume = {8},
place = {United States},
publisher = {American Chemical Society (ACS)},
year = {2021},
month = {09}}
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Brazilian National Council for Scientific and Technological Development (CNPq); São Paulo Research Foundation (FAPESP)
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