Perovskite-Ion Beam Interactions: Toward Controllable Light Emission and Lasing

Area of Science:

• Materials Science
• Optics
• Nanotechnology

Background:

• Controllable coherent and incoherent light sources are essential for integrated optics.
• Existing semiconductor materials and techniques face challenges in achieving this control.
• All-inorganic lead halide perovskites (ILHPs) offer defect tolerance and tunable band gaps, making them promising candidates.

Purpose of the Study:

• To develop a method for controllable light emitters and microlasers using ILHPs.
• To investigate the interaction between ILHPs and energetic ions for light modulation.
• To explore the fabrication of microlasers based on ILHPs.

Main Methods:

• Experimental design involving the interaction of ILHPs with energetic gallium ions.
• Low-dose ion irradiation (∼10¹⁵ ions/cm²) to modulate photoluminescence.
• High-dose ion irradiation (∼10¹⁷ ions/cm²) to induce sputtering and fabricate microlasers.

Main Results:

• Photoluminescence intensity of ILHPs was modulated by over an order of magnitude with low-dose ion irradiation.
• Ion irradiation induced defects, metallic lead formation, and amorphization, affecting light emission.
• High-dose irradiation enabled top-down fabrication of microlasers via sputtering.

Conclusions:

• Ion irradiation provides a controllable method to tune light emission from ILHPs.
• This perovskite-ion interaction is a significant step toward advanced controllable light sources for integrated optics.
• The findings enable the creation of colorful photopatterns and tailored lasing behavior.