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Analytical coupled-wave model for photonic crystal surface-emitting quantum cascade lasers
Optics Express
|August 10, 2017
Summary
A new model analyzes surface-emitting photonic-crystal quantum cascade lasers (PhC-QCLs). It accurately predicts laser properties and shows how tuning PhC structures can control lasing modes and far-field patterns.
Area of Science:
- Optics and Photonics
- Semiconductor Lasers
Background:
- Surface-emitting photonic-crystal quantum cascade lasers (PhC-QCLs) are crucial for mid-infrared applications.
- Efficient modeling of their complex 3D structures is essential for device optimization.
Purpose of the Study:
- To develop an analytical coupled-wave model for PhC-QCLs.
- To investigate the influence of PhC structures and cavity size on laser properties.
Main Methods:
- Development of a 3D analytical coupled-wave model.
- Analysis of band structure, mode frequency, cavity loss, and intensity profiles.
- Investigation of far-field patterns (FFP) and polarization.
Main Results:
- The model accurately predicts PhC-QCL properties for large-area cavities.
- Calculated FFP and polarization profiles align with experimental data.
- Demonstrated tuning of lasing modes and generation of single-lobed FFP by adjusting PhC structures.
Conclusions:
- The analytical model offers an efficient and accurate tool for PhC-QCL design.
- PhC structure tuning provides a pathway to control laser output characteristics.
- This research facilitates the development of advanced PhC-QCL devices.
