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Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
Published on: May 27, 2020
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Extraordinary exciton conductance induced by strong coupling
Johannes Feist1, Francisco J Garcia-Vidal1,2
1Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
Physical Review Letters
|May 30, 2015
Summary
Strongly coupling organic molecules to electromagnetic modes significantly boosts exciton conductance. This enables excitons to bypass molecular disorder and travel directly through structures, impacting exciton transistors and energy transport.
Area of Science:
- Organic electronics
- Quantum optics
- Materials science
Background:
- Exciton transport is crucial for organic electronic devices and biological processes.
- Disorder in organic materials typically hinders efficient exciton movement.
Purpose of the Study:
- To investigate methods for enhancing exciton conductance in organic materials.
- To explore the role of electromagnetic modes in facilitating exciton transport.
Main Methods:
- Utilized a 1D model system to simulate exciton behavior.
- Investigated the strong coupling regime between molecular excitons and electromagnetic modes.
Main Results:
- Exciton conductance was enhanced by several orders of magnitude.
- Formation of a collective polaritonic mode was observed.
- Excitons successfully bypassed disordered molecular arrays via polaritonic transport.
Conclusions:
- Strong coupling to electromagnetic modes offers a pathway to overcome disorder limitations in exciton transport.
- This approach has potential applications in exciton transistors, heat transport, and photosynthesis.
- The findings suggest new possibilities for controlling energy transfer in organic and biological systems.
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