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Continuous-wave operation in directly patterned perovskite distributed feedback light source at room temperature.

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Area of Science:

Materials Science
Optoelectronics
Nanotechnology

Background:

Perovskite materials offer promising optoelectronic properties for light-based applications.
Developing efficient and stable perovskite light sources, particularly under continuous-wave operation, remains a challenge.

Purpose of the Study:

To demonstrate a directly patterned perovskite distributed feedback (DFB) resonator.
To investigate amplified spontaneous emission (ASE) characteristics under continuous-wave (CW) optical pumping at room temperature.
To explore the potential for energy-efficient perovskite lasers and light sources.

Main Methods:

Direct nanostructuring of perovskite thin films using thermal nanoimprint lithography.
Fabrication of a perovskite distributed feedback (DFB) resonator.
Optical pumping experiments under continuous-wave (CW) conditions at room temperature.

Main Results:

Achieved narrow amplified spontaneous emission (ASE) at low pump powers (0.1 W/cm²).
Observed a 16-fold reduction in emission linewidth in the MAPbI₃ DFB cavity compared to pristine thin films.
Demonstrated efficient light emission from the nanostructured perovskite DFB resonator.

Conclusions:

Direct nanostructuring via thermal nanoimprint lithography is effective for creating perovskite DFB resonators.
The developed perovskite DFB resonator enables efficient CW amplified spontaneous emission at room temperature.
Findings support the development of practical, energy-efficient perovskite lasers and light sources.