Surface plasmon coupling regulated CsPbBr₃ perovskite lasers in a metal-insulator-semiconductor structure

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Surface plasmon effects enable micro/nano-lasers to surpass the optical diffraction limit.
• Metal-insulator-semiconductor (M-I-S) structures are crucial for advanced optoelectronic devices.
• Perovskite materials offer unique properties for light emission applications.

Purpose of the Study:

• To design and investigate a novel Ag/SiO2/CsPbBr3 hybrid structure for enhanced optoelectronic performance.
• To explore the surface plasmon coupling effect between metal and perovskite for improved light emission.
• To optimize the M-I-S structure for achieving low laser thresholds and high quality factors.

Main Methods:

• Fabrication of a hybrid Ag/SiO2/CsPbBr3 metal-insulator-semiconductor structure.
• Experimental characterization of optical properties and emission efficiencies.
• COMSOL Multiphysics software simulations for structural optimization.

Main Results:

• The optimal structure achieved enhanced radiative recombination efficiencies in CsPbBr3 perovskite.
• The best performance was obtained with a 10 nm SiO2 layer and an 80 nm Ag metal film.
• The optimized structure demonstrated a low laser threshold of 0.138 μW and a high quality factor (Q) of 3907.

Conclusions:

• The Ag/SiO2/CsPbBr3 hybrid structure effectively utilizes surface plasmon coupling for enhanced light emission.
• Optimized structural parameters are critical for achieving superior optoelectronic device performance.
• This work represents a significant advancement towards practical applications in biological technology, chemical identification, and optical interconnects.