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Updated: Mar 27, 2026

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
Published on: April 28, 2016
Frequency-dependent topological polaritons in carbon nanotube array/hBN heterostructures
Yufeng Xie1, Kaijun Feng2, Zhichun Zhang1
1State Key Laboratory of Micro-nano Engineering Science, Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy and Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, China.
Researchers explored plasmonics in carbon nanotubes (CNTs) and hexagonal boron nitride (hBN). They achieved controllable topological transitions of polaritons, enabling nanoscale light manipulation.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanophotonics
Background:
- Plasmons in carbon nanotubes (CNTs) offer strong spatial confinement and high-quality factors.
- Modulating plasmon dispersion relations in CNTs is challenging due to their intrinsic electronic properties.
Purpose of the Study:
- To investigate frequency-dependent topological polaritons in CNT-array/hexagonal boron nitride (hBN) heterostructures.
- To achieve controllable topological transitions of polariton wavefronts and demonstrate novel polaritonic modes.
Main Methods:
- Fabrication of CNT-array/hBN heterostructures.
- Characterization of hyperbolic plasmons coupled with phonon polaritons.
- Analysis of polariton wavefront transitions and confinement phenomena.
Main Results:
- Demonstrated frequency-dependent topological polaritons from coupled hyperbolic plasmons and phonon polaritons.
- Achieved controllable topological transition of polariton wavefronts from hyperbolic to elliptical.
- Observed whispering-gallery polaritonic modes confined in closed-loop CNT arrays on hBN.
Conclusions:
- Provided fundamental insights into optical topological transitions in low-dimensional heterostructures.
- Established a promising route for manipulating light propagation and energy transfer at the nanoscale using CNT/hBN systems.
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