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Adaptive nonlinear wavefront shaping in layered TMDs
Optics Letters
|June 15, 2026
Summary
We demonstrate dynamic control of nonlinear wavefronts in tungsten disulfide (WS2) using wavefront shaping. This method enhances second harmonic generation (SHG) by over three orders of magnitude, enabling programmable nonlinear holograms.
Area of Science:
- Nonlinear optics
- Materials science
- Photonics
Background:
- Two-dimensional transition metal dichalcogenides (TMDs) show promise for nonlinear photonics due to strong nonlinear susceptibility and integrated platform compatibility.
- While second harmonic generation (SHG) in TMDs is studied, dynamic control of nonlinear wavefronts is underexplored.
- Metasurfaces offer nonlinear beam engineering but face limitations in conversion efficiency and design flexibility.
Purpose of the Study:
- To achieve dynamic control and enhancement of nonlinear wavefronts in two-dimensional materials.
- To overcome limitations of metasurfaces in nonlinear beam engineering.
- To explore novel applications in nonlinear imaging and optical information processing.
Main Methods:
- Employing feedback-based wavefront shaping with spatial light modulators.
- Utilizing pyramid-like WS2 multilayer structures.
- Achieving phase-only modulation for dynamic SHG signal shaping.
Main Results:
- Enhancing SHG from WS2 multilayer structures by over three orders of magnitude in specific spatial regions.
- Demonstrating the programming of nonlinear holograms.
- Achieving dynamic shaping of the SHG signal through phase modulation.
Conclusions:
- Feedback-based wavefront shaping offers a powerful method for dynamic control of nonlinear wavefronts in 2D materials.
- This technique significantly enhances SHG, overcoming limitations of previous approaches.
- Opens new avenues for nonlinear imaging, optical information processing, and data communication.
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