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April 26, 2026Laser & Photonics Review

Transport of Near‐Infrared Exciton Polaritons in MoTe 2 Waveguides Revealed by Nanoimaging

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Authors

XLXiuting LiRCRunzhi CaoYWYunkai Wang

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Overview

Randomized trial investigates the transport properties of exciton polaritons in MoTe2, suggesting effective substrate engineering for low-loss devices.

Key Points

  • This research aims to understand the transport properties and loss mechanisms of exciton polaritons in MoTe2 waveguides.
  • Utilized scattering-type scanning near-field optical microscopy (s-SNOM) to probe MoTe2 flakes on Si/SiO2 substrates.
  • Conducted excitation-energy- and thickness-dependent s-SNOM measurements and performed rigorous simulations.
  • Identified loss channels and evaluated the impact of substrate material on polariton propagation.
  • Identified two dominant loss channels: excitonic absorption and radiation leakage into silicon.
  • Enhanced EPs propagation length from 2.7 to 7.6 µm by replacing Si/SiO2 with LiNbO3 substrate.
  • Demonstrated lower exciton-absorption losses and improved EPs field confinement with higher refractive index of LiNbO3.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/69edacbd4a46254e215b4732https://doi.org/10.1002/lpor.71210
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Also Consider

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