Journal
NATURE MATERIALS
Volume 17, Issue 2, Pages 134-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT5047
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Funding
- National Research Council (NRC)
- American Society of Engineering (ASEE) NRL Postdoctoral Fellowship Programs
- Naval Research Enterprise Internship Program (NREIP)
- Office of Naval Research
- ARO [w911NF-13-1-0210]
- AFOSR [FA9550-15-0478]
- Moore Investigator in Quantum Materials EPIQS program [GBMF4533]
- ONR [N00014-15-1-2671]
- NSF [CMMI 1538127]
- US Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1538127] Funding Source: National Science Foundation
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Conventional optical components are limited to size scales much larger than the wavelength of light, as changes to the amplitude, phase and polarization of the electromagnetic fields are accrued gradually along an optical path. However, advances in nanophotonics have produced ultrathin, so-called 'flat' optical components that beget abrupt changes in these properties over distances significantly shorter than the free-space wavelength(1-8). Although high optical losses still plague many approaches(9), phonon polariton (PhP) materials have demonstrated long lifetimes for sub-diffractional modes(10-13) in comparison to plasmon-polariton-based nanophotonics. We experimentally observe a threefold improvement in polariton lifetime through isotopic enrichment of hexagonal boron nitride (hBN). Commensurate increases in the polariton propagation length are demonstrated via direct imaging of polaritonic standing waves by means of infrared nano-optics. Our results provide the foundation for a materials-growth-directed approach aimed at realizing the loss control necessary for the development of PhP-based nanophotonic devices.
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