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Updated: Sep 17, 2025
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
6.9K
Anomalous dispersion in coupled surface plasmons and excitons.
Leila Hesami1, Md Golam Rabbani Chowdhury1, Mikhail A Noginov1
1Center for Materials Research, Norfolk State University, Norfolk, VA, 23504, USA.
Nanophotonics (Berlin, Germany)
|June 30, 2025
Summary
Researchers explored Rhodamine laser dye dispersion in Kretschmann geometry. They observed unique "staircase" and "fork" dispersion branches and strong coupling effects in polymer matrices.
Area of Science:
- Optics and Photonics
- Materials Science
- Polymer Science
Background:
- Dispersion properties of laser dyes are crucial for tuning laser emission.
- Kretschmann geometry is a standard method for studying surface plasmon resonance and optical phenomena.
- Poly(methyl methacrylate) (PMMA) is a common polymer matrix for laser dyes.
Purpose of the Study:
- To investigate the dispersion characteristics of Rhodamine laser dyes in PMMA polymer.
- To analyze the impact of single and double doping on dispersion curves.
- To explore the influence of dye mixtures and high concentrations on optical coupling.
Main Methods:
- Experimental study of Rhodamine laser dyes in PMMA.
- Utilized Kretschmann geometry for optical measurements.
- Investigated singly doped, doubly doped, and mixed dye systems.
Main Results:
- Observed multi-branch "staircase" dispersion curves in singly and doubly doped PMMA.
- Identified a novel dispersion "fork" branch.
- Demonstrated unparallel dispersion and coupling in mixtures of different Rhodamine dyes.
- Showcased strong coupling effects at high dye concentrations without metallic components.
Conclusions:
- The study reveals complex dispersion behaviors in Rhodamine-doped polymers.
- Dispersion can be engineered through doping strategies and dye mixtures.
- High dye concentrations facilitate strong coupling, offering metal-free optical functionalities.
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