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2D tunable all-solid-state random laser in the visible
Bhupesh Kumar1, Ran Homri1, Patrick Sebbah2
1Department of Physics, The Jack and Pearl Resnick Institute for Advanced Technology, Bar-Ilan University, 5290002, Ramat Gan, Israel.
Scientific Reports
|May 23, 2023
Summary
Researchers demonstrate a novel 2D solid-state random laser using disordered air-holes in a polymer film. This compact, tunable laser source offers a new platform for exploring advanced photonics.
Area of Science:
- Photonics
- Materials Science
- Solid-State Physics
Background:
- Random lasers offer unique optical feedback mechanisms.
- Developing compact, tunable solid-state lasers is a key technological goal.
- Controlled disorder in materials can lead to novel photonic properties.
Purpose of the Study:
- To demonstrate a two-dimensional (2D) solid-state random laser emitting in the visible spectrum.
- To investigate the role of controlled disorder (air-holes) in providing optical feedback.
- To explore tunability and spatial coherence of the random laser emission.
Main Methods:
- Fabrication of a dye-doped polymer film with a controlled disordered arrangement of air-holes.
- Utilizing optical pumping to achieve laser emission.
- Systematic variation of scatterer density and pump area to study laser characteristics.
Main Results:
- Demonstrated a 2D solid-state random laser with visible emission.
- Identified an optimal scatterer density for minimum threshold and maximum scattering.
- Achieved red-shifting of laser emission by decreasing scatterer density or increasing pump area.
- Showcased easy control over spatial coherence by varying pump area.
Conclusions:
- The developed 2D random laser is a compact, on-chip tunable laser source.
- This system provides a unique platform for exploring non-Hermitian photonics.
- Controlled disorder is an effective strategy for designing advanced laser devices.
