Launching Phonon Polaritons by Natural Boron Nitride Wrinkles with Modifiable Dispersion by Dielectric Environments.
Sign Up to like & getrecommendations! Published in 2017 at "Advanced materials"
DOI: 10.1002/adma.201702494
Abstract: Interference-free hyperbolic phonon polaritons (HPPs) excited by natural wrinkles in a hexagonal boron nitride (hBN) microcrystal are reported both experimentally and theoretically. Although their geometries are off-resonant with the excitation wavelength, the wrinkles compensate for… read more here.
Keywords: phonon polaritons; dielectric environments; boron nitride; phonon ... See more keywords
Controlling and Focusing in-plane Hyperbolic Phonon Polaritons in α-MoO3 with A Curved Plasmonic Antenna.
Sign Up to like & getrecommendations! Published in 2021 at "Advanced materials"
DOI: 10.1002/adma.202104164
Abstract: Hyperbolic phonon polaritons (HPhPs) sustained in polar van der Waals (vdW) crystals exhibit extraordinary confinement of long-wave electromagnetic fields to the deep subwavelength scale. In stark contrast to uniaxial vdW hyperbolic materials, recently emerged biaxial… read more here.
Keywords: phonon polaritons; plane hyperbolic; hyperbolic phonon; controlling focusing ... See more keywords
Tunable planar focusing based on hyperbolic phonon polaritons in α-MoO3.
Sign Up to like & getrecommendations! Published in 2022 at "Advanced materials"
DOI: 10.1002/adma.202105590
Abstract: Manipulation of the propagation and energy transport characteristics of subwavelength infrared (IR) light fields is critical for the application of nanophotonics devices in photocatalysis, biosensing, and thermal management. In this context, metamaterials are useful composite… read more here.
Keywords: planar focusing; tunable planar; polaritons moo3; phonon polaritons ... See more keywords
Revealing Phonon Polaritons in Hexagonal Boron Nitride by Multipulse Peak Force Infrared Microscopy
Sign Up to like & getrecommendations! Published in 2019 at "Advanced Optical Materials"
DOI: 10.1002/adom.201901084
Abstract: DOI: 10.1002/adom.201901084 The generation of short-wavelength polaritons from long-wavelength photons of the same energy can be inefficient due to their momentum mismatch. Hence, to launch polaritons from far-field illumination, phase matching is required.[3] One way… read more here.
Keywords: force infrared; phonon polaritons; peak force; microscopy ... See more keywords
Polaritons in Nanomaterials
Sign Up to like & getrecommendations! Published in 2020 at "Advanced Optical Materials"
DOI: 10.1002/adom.201902104
Abstract: DOI: 10.1002/adom.201902104 Herein, there are four papers involving this technical aspect. The contribution by Xiaoxia Yang and co-workers[1] gives a comprehensive summary of the experimental characterization methods for polaritons and compares their relative merits for… read more here.
Keywords: optics; phonon polaritons; microscopy; spectroscopy ... See more keywords
Tunable propagation of surface plasmon-phonon polaritons in graphene-hBN metamaterials
Sign Up to like & getrecommendations! Published in 2021 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2021.107232
Abstract: Abstract We present a detailed study on the tunable propagation derived from the coupled surface plasmon–phonon polaritons (SPPPs) with the effective medium theory (EMT) in graphene-hBN metamaterials (MMs). Four reststrahlen bands (RBs) are observed, two… read more here.
Keywords: propagation; tunable propagation; surface plasmon; plasmon phonon ... See more keywords
Direct Visualization of Ultrastrong Coupling between Luttinger-Liquid Plasmons and Phonon Polaritons
Sign Up to like & getrecommendations! Published in 2022 at "Nano Letters"
DOI: 10.1021/acs.nanolett.1c04807
Abstract: Ultrastrong coupling of light and matter creates new opportunities to modify chemical reactions or develop novel nanoscale devices. One-dimensional Luttinger-liquid plasmons in metallic carbon nanotubes are long-lived excitations with extreme electromagnetic field confinement. They are… read more here.
Keywords: ultrastrong coupling; luttinger liquid; phonon polaritons; direct visualization ... See more keywords
Ultralow-Loss Phonon Polaritons in the Isotope-Enriched α-MoO3.
Sign Up to like & getrecommendations! Published in 2022 at "Nano letters"
DOI: 10.1021/acs.nanolett.2c03742
Abstract: α-MoO3, a natural van der Waals (vdWs) material, has received wide attention in nano-optics for supporting highly confined anisotropic phonon polaritons (PhPs) from the mid-infrared to the terahertz region, which opens a new route for… read more here.
Keywords: ultralow loss; loss; phonon polaritons; enriched moo3 ... See more keywords
Anisotropic Flow Control and Gate Modulation of Hybrid Phonon-Polaritons.
Sign Up to like & getrecommendations! Published in 2019 at "Nano letters"
DOI: 10.1021/acs.nanolett.8b03732
Abstract: Light-matter interaction in two-dimensional photonic or phononic materials allows for the confinement and manipulation of free-space radiation at sub-wavelength scales. Most notably, the van der Waals heterostructure composed of graphene (G) and hexagonal boron nitride (hBN)… read more here.
Keywords: flow control; phonon polaritons; control; anisotropic flow ... See more keywords
Colossal enhancement of near-field thermal radiation across hundreds of nanometers between millimeter-scale plates through surface plasmon and phonon polaritons coupling.
Sign Up to like & getrecommendations! Published in 2019 at "Nano letters"
DOI: 10.1021/acs.nanolett.9b03269
Abstract: Coupling modes between surface plasmon polaritons (SPPs) and surface phonon polaritons (SPhPs) play a vital role in enhancing near-field thermal radiation, but are relatively unexplored and no experimental result is available. Here, we consider the… read more here.
Keywords: phonon polaritons; field thermal; near field; surface plasmon ... See more keywords
Second-Harmonic Generation from Critically Coupled Surface Phonon Polaritons
Sign Up to like & getrecommendations! Published in 2017 at "ACS Photonics"
DOI: 10.1021/acsphotonics.7b00118
Abstract: Mid-infrared nanophotonics can be realized using subdiffractional light localization and field enhancement with surface phonon polaritons in polar dielectric materials. We experimentally demonstrate second-harmonic generation due to the optical field enhancement from critically coupled surface… read more here.
Keywords: surface phonon; second harmonic; geometry; phonon polaritons ... See more keywords