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Tuning the optical nonlinearity of graphene
1State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (MOE), and Department of Physics, Fudan University, Shanghai 200433, China.
The Journal of Chemical Physics
|September 3, 2020
Summary
Graphene
Area of Science:
- Photonics and optoelectronics
- Condensed matter physics
- Quantum optics
Background:
- Nonlinear optical responses are crucial for photonics and optoelectronics.
- Graphene's unique electronic properties, like massless Dirac fermions, offer tunable nonlinearities.
- Electrical gating provides a method to control these nonlinear optical susceptibilities.
Purpose of the Study:
- To explore the tunable nonlinear optical responses in graphene.
- To understand the fundamental mechanism behind graphene's nonlinear optical properties.
- To investigate the potential of graphene in novel device applications.
Main Methods:
- Utilizing electrical gating to tune graphene's nonlinear optical properties.
- Investigating quantum interference between multi-photon transition pathways.
- Analyzing the unique dispersion and low-dimensionality of Dirac fermions in graphene.
Main Results:
- Graphene's nonlinear optical susceptibilities are readily controlled via electrical gating.
- The tuning mechanism relies on quantum interference, differing from conventional materials.
- The study provides fundamental insights into nonlinear optical processes in low-dimensional systems.
Conclusions:
- Graphene offers a unique platform for tuning nonlinear optical responses.
- Its distinct nonlinear optical behavior, driven by quantum interference, contrasts with conventional materials.
- Graphene's properties are promising for advanced optoelectronic and photonic device applications.
