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Polarization control by modulated photonic-crystal lasers
Optics Letters
|October 1, 2019
Summary
Modulated photonic-crystal lasers offer two-dimensional beam steering. These lasers precisely control output direction and polarization by modulating air hole positions, enabling versatile optical applications.
Area of Science:
- Photonics
- Laser Technology
- Materials Science
Background:
- Photonic-crystal lasers offer unique light manipulation capabilities.
- Controlling output beam direction and polarization is crucial for advanced optical systems.
Purpose of the Study:
- To investigate two-dimensional beam steering in modulated photonic-crystal lasers.
- To explore the relationship between air hole modulation and output beam characteristics (direction and polarization).
Main Methods:
- Excitation of two-dimensional cavity modes at the non-diffractive photonic band-edge.
- Introduction of one-directional (distance-based) and two-directional (angle-based) position modulation of air holes.
- Analysis of output beam direction and polarization properties.
Main Results:
- Two-dimensional beam direction control was achieved through position modulation.
- One-directional modulation resulted in output beams polarized perpendicular to the modulation direction.
- Two-directional modulation yielded circularly polarized output beams.
Conclusions:
- Modulated photonic-crystal lasers provide simultaneous control over beam direction and polarization.
- The type of position modulation dictates the output beam's polarization state.
- These findings advance the development of tunable laser systems.
