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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
Summary
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.
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.
