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Chirality-Selective Remote Pumping for Directional On-Chip Tamm Plasmon Emission.

Hongjie Huang1,2, Haofeng Zang1,2, Cheng Zhang3

  • 1Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei 230026, China.

Nano Letters
|April 3, 2026
PubMed
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Researchers developed a new on-chip photonic architecture for highly directional light sources. This design enables efficient, controlled light emission from free-space excitation for integrated nanophotonics.

Area of Science:

  • Nanophotonics
  • Plasmonics
  • Metasurfaces

Background:

  • Realizing efficient, directional on-chip light sources in planar architectures is a significant challenge.
  • Existing methods often struggle with precise control over light emission directionality and efficiency.

Purpose of the Study:

  • To develop an integrated nanophotonic architecture for remotely pumped, highly directional on-chip light sources.
  • To achieve full-path control from free-space excitation to on-chip light emission.

Main Methods:

  • Integration of a metallic nanoslit metasurface with a Tamm plasmon polarization (TPP) cavity.
  • Utilizing circularly polarized pump light to excite unidirectional surface plasmon polaritons (SPPs).
  • Excitation of the spatially separated TPP mode via SPPs.
Keywords:
Tamm plasmonhybrid metal/dielectric structuresradiation manipulationsurface plasmons

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Main Results:

  • Observed enhanced Tamm plasmon (TP) emission.
  • Achieved a 3-fold enhancement in the chiral excitation ratio.
  • Demonstrated a highly directional beam with a divergence half angle below 3.5°.
  • Showcased full-path control from excitation to emission.

Conclusions:

  • The proposed photonic architecture offers a promising solution for on-chip light sources.
  • This technology is suitable for applications in laser technology, sensing, and quantum information processing.
  • The integrated metasurface-cavity system provides precise control over light emission properties.