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Two-dimensional gallium nitride realized via graphene encapsulation.
TLDR
The synthesis of 2D gallium nitride (GaN) via a migration-enhanced encapsulated growth (MEEG) technique utilizing epitaxial graphene is demonstrated and it is established that graphene plays a critical role in stabilizing the direct-bandgap, 2D buckled structure.
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Sub-diffractional volume-confined polaritons in the natural hyperbolic material hexagonal boron nitride.
TLDR
Three-dimensionally confined 'hyperbolic polaritons' in boron nitride nanocones that support four series (up to the seventh order) modes in two spectral bands are reported on.
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Polaritons in layered two-dimensional materials.
TLDR
The emerging field of 2D material polaritonics and their hybrids provide enticing avenues for manipulating light-matter interactions across the visible, infrared to terahertz spectral ranges, with new optical control beyond what can be achieved using traditional bulk materials.
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Low-loss, infrared and terahertz nanophotonics using surface phonon polaritons
Abstract The excitation of surface-phonon-polariton (SPhP) modes in polar dielectric crystals and the associated new developments in the field of SPhPs are reviewed. The emphasis of this work is on…
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Role of epsilon-near-zero substrates in the optical response of plasmonic antennas
Radiation patterns and the resonance wavelength of a plasmonic antenna are significantly influenced by its local environment, particularly its substrate. Here, we experimentally explore the role of…
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Photonics with hexagonal boron nitride
For more than seven decades, hexagonal boron nitride (hBN) has been employed as an inert, thermally stable engineering ceramic; since 2010, it has also been used as the optimal substrate for graphene…
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Low-loss, extreme subdiffraction photon confinement via silicon carbide localized surface phonon polariton resonators.
TLDR
Using fabricated 6H-silicon carbide nanopillar antenna arrays, the observation of subdiffraction, localized SPhP resonances is reported on, promising to reinvigorate research in SPhp phenomena and their use for nanophotonic applications.
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Hyperbolic phonon-polaritons in boron nitride for near-field optical imaging and focusing
TLDR
It is reported that hyperbolic phonon polaritons allow for a flat slab of hexagonal boron nitride to enable exciting near-field optical applications, including unusual imaging phenomenon and sub-diffractional focusing.
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Atomic-scale photonic hybrids for mid-infrared and terahertz nanophotonics.
TLDR
The potential of electromagnetic hybrids--materials incorporating mixtures of SPPs and SPhPs--for overcoming the limitations of the individual polaritons are discussed, and a new type of atomic-scale hybrid--the crystalline hybrid--is proposed that could enable the creation of novel actively tunable, yet low-loss optics at the nanoscale.
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Plasmonic nanopillar arrays for large-area, high-enhancement surface-enhanced Raman scattering sensors.
Efforts to create reproducible surface-enhanced Raman scattering (SERS)-based chemical and biological sensors has been hindered by difficulties in fabricating large-area SERS-active substrates with a…
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