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Transmission-type photonic doping for high-efficiency epsilon-near-zero supercoupling
Wendi Yan1, Ziheng Zhou2, Hao Li1
1Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China.
Nature Communications
|October 3, 2023
Summary
Transmission-type photonic doping enables near-ideal supercoupling in epsilon-near-zero (ENZ) media, achieving high efficiency and zero-phase advance for flexible waveguide applications.
Area of Science:
- Optics and Photonics
- Metamaterials
- Nanophotonics
Background:
- The supercoupling effect in epsilon-near-zero (ENZ) media allows light tunneling through subwavelength channels.
- Conventional photonic doping for ENZ supercoupling introduces losses due to resonant dopants.
Purpose of the Study:
- To propose and demonstrate a transmission-type photonic doping approach for achieving near-ideal ENZ supercoupling.
- To overcome the limitations of resonant doping by utilizing low-quality-factor one-dimensional modes.
Main Methods:
- Implementing transmission-type photonic doping in ENZ media.
- Replacing 2D resonant doping modes with 1D transmission modes.
- Experimental verification of the proposed method.
Main Results:
- Achieved obviously high transmission efficiency in ENZ supercoupling.
- Demonstrated zero-phase advance, approaching ideal supercoupling conditions.
- Experimental validation of the transmission-type doping approach.
Conclusions:
- Transmission-type photonic doping offers a viable route to high-efficiency ENZ supercoupling.
- Engineered waveguides with arbitrary dimensions and shapes enable flexible power conduits.
- This advancement supports innovations in millimeter-wave and terahertz integrated circuits.
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