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Nanoscale mapping and spectroscopy of non-radiative hyperbolic modes in hexagonal boron nitride nanostructures
- Source :
- Brown, Lisa V; Davanco, Marcelo; Sun, Zhiyuan; Kretinin, Andrey; Chen, Yiguo; Matson, Joseph R; et al.(2018). Nanoscale Mapping and Spectroscopy of Nonradiative Hyperbolic Modes in Hexagonal Boron Nitride Nanostructures. NANO LETTERS, 18(3), 1628-1636. doi: 10.1021/acs.nanolett.7b04476. UC San Diego: Retrieved from: http://www.escholarship.org/uc/item/8276b1cz, Nano letters, vol 18, iss 3
- Publication Year :
- 2017
-
Abstract
- The inherent crystal anisotropy of hexagonal boron nitride (hBN) sustains naturally hyperbolic phonon polaritons, i.e. polaritons that can propagate with very large wavevectors within the material volume, thereby enabling optical confinement to exceedingly small dimensions. Indeed, previous research has shown that nanometer-scale truncated nanocone hBN cavities, with deep subwavelength dimensions, support three-dimensionally confined optical modes in the mid-infrared. Due to optical selection rules, only a few of many such modes predicted theoretically have been observed experimentally via far-field reflection and scattering-type scanning near-field optical microscopy. The Photothermal induced resonance (PTIR) technique probes optical and vibrational resonances overcoming weak far-field emission by leveraging an atomic force microscope (AFM) probe to transduce local sample expansion due to light absorption. Here we show that PTIR enables the direct observation of previously unobserved, dark hyperbolic modes of hBN nanostructures. Leveraging these optical modes could yield a new degree of control over the electromagnetic near-field concentration, polarization and angular momentum in nanophotonic applications.<br />14 pages with references, 4 figures
- Subjects :
- PTIR
Materials science
Phonon
Nanophotonics
FOS: Physical sciences
Physics::Optics
Bioengineering
Nanotechnology
02 engineering and technology
phonon polariton
010402 general chemistry
01 natural sciences
Molecular physics
Article
law.invention
Optical microscope
law
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
cond-mat.mes-hall
MD Multidisciplinary
Polariton
General Materials Science
hexagonal boron nitride
Nanoscience & Nanotechnology
Spectroscopy
Hyperbolic
Condensed Matter - Mesoscale and Nanoscale Physics
Mechanical Engineering
Resonance
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Polarization (waves)
3. Good health
0104 chemical sciences
Near-field scanning optical microscope
nonradiative
SNOM
0210 nano-technology
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Brown, Lisa V; Davanco, Marcelo; Sun, Zhiyuan; Kretinin, Andrey; Chen, Yiguo; Matson, Joseph R; et al.(2018). Nanoscale Mapping and Spectroscopy of Nonradiative Hyperbolic Modes in Hexagonal Boron Nitride Nanostructures. NANO LETTERS, 18(3), 1628-1636. doi: 10.1021/acs.nanolett.7b04476. UC San Diego: Retrieved from: http://www.escholarship.org/uc/item/8276b1cz, Nano letters, vol 18, iss 3
- Accession number :
- edsair.doi.dedup.....01f0684887aae73d04c3e508b15494d8