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Enhanced Charge Transport in Two-Dimensional Materials through Light-Matter Strong Coupling.
Pooja Bhatt1, Kuljeet Kaur1, Jino George1
1Indian Institute of Science Education and Research (IISER), Mohali, Punjab 140306, India.
ACS Nano
|August 4, 2021
Summary
Strong light-matter interactions enhance electron transport in two-dimensional materials. This study shows over 50x mobility increase and a 2-order magnitude boost in I_on/I_off ratio using a tunable cavity.
Area of Science:
- Condensed Matter Physics
- Quantum Optics
- Materials Science
Background:
- Strong light-matter interaction is a key area in functional materials research.
- Controlling material properties like charge transport via vacuum electromagnetic fields is under investigation.
Purpose of the Study:
- To explore the design of a Fabry-Perot cavity in a field-effect transistor.
- To study the impact of strong light-matter coupling on charge transport in two-dimensional (2D) materials.
Main Methods:
- Fabrication of a Fabry-Perot cavity integrated into a field-effect transistor.
- Optical and electrical measurements of strongly coupled tungsten disulfide (WS2).
- Analysis of cavity tuning and coupling strength effects on electronic properties.
Main Results:
- Observed significant enhancement of electron transport in WS2 at room temperature.
- Electron mobility increased over 50 times under ON resonance conditions.
- Achieved a 2-order magnitude increase in the Ion/Ioff ratio without chemical modification.
Conclusions:
- Strong light-matter coupling can effectively modify electronic properties of 2D materials.
- Demonstrated collective light-matter interaction influencing effective mass and Schottky barrier height.
- This approach offers a novel pathway for tuning material properties for electronic applications.
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