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Fabry-Perot interferometer with a quantum well mirror for controllable dispersion compensation.
Optics Letters
|October 1, 2025
Summary
This study demonstrates controlling optical dispersion using quantum well (QW) structures in a Fabry-Perot interferometer. Negative dispersion is achieved in a narrow spectral region, enabling potential applications in optical devices.
Area of Science:
- Optics and Photonics
- Semiconductor Physics
- Materials Science
Background:
- Fabry-Perot interferometers are crucial optical devices.
- Controlling optical dispersion is essential for advanced photonic applications.
- Quantum wells (QWs) offer unique optical properties.
Purpose of the Study:
- To investigate the control of second-order dispersion in a monolithic Fabry-Perot interferometer.
- To utilize epitaxial heterostructures with quantum wells as a bottom mirror.
- To achieve tunable negative dispersion within a narrow spectral region.
Main Methods:
- Fabrication of epitaxial heterostructures with InGaAs/GaAs quantum wells.
- Utilizing the excitonic resonance of the quantum well.
- Operating the interferometer at cryogenic temperatures.
- Proposing an active device design for switching dispersion compensation.
Main Results:
- Successfully introduced negative second-order dispersion in a narrow spectral band.
- Maintained a constant reflection coefficient across the targeted spectral region.
- Demonstrated the feasibility of the concept with InGaAs/GaAs QWs.
- Proposed a method for active control of dispersion compensation.
Conclusions:
- Controlling second-order dispersion is achievable in quantum well-based Fabry-Perot interferometers.
- The proposed method allows for precise spectral control of optical dispersion.
- The active device design offers dynamic switching of dispersion compensation for tunable optical systems.
