Heterostructure nanodisks for multicolor polariton lasers with controllable whispering-gallery modes

Area of Science:

• Optoelectronics
• Materials Science
• Nanophotonics

Background:

• Next-generation integrated circuits require ultrasmall, highly efficient optoelectronic devices.
• Tunable color emission is crucial for diverse applications in nanophotonics.
• III-nitride materials offer promising properties for optoelectronic device fabrication.

Purpose of the Study:

• To realize tunable multicolor nanolasers using disk-shaped axial heterostructures.
• To investigate the polaritonic lasing phenomena in GaN and InGaN materials within nanodisks.
• To demonstrate independent control of lasing characteristics through whispering-gallery modes.

Main Methods:

• Fabrication of disk-shaped axial heterostructures using III-nitride materials (GaN/InGaN/GaN).
• Utilizing optical confinement and active waveguiding principles.
• Exploiting exciton-polariton development and whispering-gallery modes for optical gain.

Main Results:

• Achieved tunable multicolor nanolasers with disk-shaped axial heterostructures.
• Observed polaritonic lasing in both GaN and InGaN components.
• Demonstrated distinct lasing characteristics between GaN and InGaN, indicating unique polariton behavior.
• Enabled tunable laser colors in the visible spectrum and independent control of lasing via whispering-gallery modes.

Conclusions:

• Successfully established tunable dual-color polariton nanolasers for the first time.
• Demonstrated the potential of III-nitride heterostructure disks for advanced nanophotonic devices.
• Highlighted the significance of optical confinement and active waveguiding in achieving desired laser functionalities.