Tailoring Single-Mode Random Lasing of Tin Halide Perovskites Integrated in a Vertical Cavity

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Developing predictable random lasing (RL) is crucial for stable, low-cost optical sources.
• Tailoring RL characteristics typically requires complex photonic structures, posing a design challenge.

Purpose of the Study:

• To demonstrate the tuning of random lasing characteristics in simple perovskite-based vertical cavities.
• To achieve controlled emission energy, threshold, and mode behavior in random lasing.

Main Methods:

• Utilizing spin-coated and inkjet-printed tin-based perovskites.
• Integrating perovskites into a low-quality factor vertical cavity.
• Analyzing lasing behavior under different cavity mode-photoluminescence (PL) peak energy alignments.

Main Results:

• Standard vertical lasing observed when cavity mode aligns with the photoluminescence (PL) peak.
• Achieved single-mode random lasing with the lowest threshold when the cavity mode is above the PL peak.
• Observed a significantly enhanced quality factor (up to 10,000) in single-mode RL operation.

Conclusions:

• Simple perovskite-integrated vertical cavities can effectively tune random lasing properties.
• This approach enables low-cost, stable, and non-chaotic random lasing sources.
• Results hold significant implications for technological advancements in optical sources.