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Frequency-tunable terahertz graphene laser enabled by pseudomagnetic fields in strain-engineered graphene.
Optics Express
|March 17, 2021
Summary
Researchers propose a chip-scale graphene laser using strain-induced Landau quantization. This novel approach enables tunable lasing without external magnetic fields, advancing graphene-based optoelectronics.
Area of Science:
- Condensed matter physics
- Optoelectronics
- Materials science
Background:
- Graphene-based optoelectronic devices are crucial for next-generation integrated circuits.
- The chip-scale integration of graphene-based lasers remains a significant challenge.
Purpose of the Study:
- To theoretically investigate the feasibility of chip-scale graphene lasers.
- To explore the potential of Landau-quantized graphene as a gain medium for lasing.
Main Methods:
- Utilizing tight-binding theory to compute electronic states in strained graphene.
- Employing many-particle Hamiltonian analyses for laser dynamics.
Main Results:
- Demonstrated that Landau-quantized graphene can function as a gain medium for lasing without external magnetic fields.
- Showcased tunable laser frequency through controlled strain levels in graphene.
Conclusions:
- The proposed zero-field graphene Landau level laser is theoretically viable.
- This technology could enable novel graphene-based electronic-photonic integrated circuits.
