Ga₂O₃ based multilevel solar-blind photomemory array with logic, arithmetic, and image storage functions.

Area of Science:

• Materials Science
• Optoelectronics
• Semiconductor Devices

Background:

• Photomemories enable integrated optical sensing, data storage, and processing.
• Solar-blind region operation offers advantages like ambient light insusceptibility and higher capacity.
• Limited research exists on solar-blind photomemories.

Purpose of the Study:

• To propose and demonstrate a Gallium Oxide (Ga2O3) based solar-blind photomemory array.
• To integrate logic, arithmetic, and optoelectronic memory functions into a single device.
• To explore the potential of Ga2O3 in high-performance information storage and computing.

Main Methods:

• Fabrication of a Ga2O3 based photomemory array.
• Characterization of the device's field-effect transistor performance, including on/off ratio, responsivity, and detectivity.
• Investigation of hole trapping/de-trapping mechanisms for multilevel data storage.
• Demonstration of reconfigurable logic (AND/OR) operations and arithmetic functions.

Main Results:

• The Ga2O3 photomemory array exhibited n-type field-effect transistor characteristics.
• Achieved high performance metrics: on/off ratio of 10^6, responsivity of 8 × 10^3 A W^-1, and detectivity of 1.42 × 10^14 Jones.
• Demonstrated multilevel data storage, reconfigurable logic operations, and arithmetic functions (counting, addition).
• Successfully utilized the array for solar-blind image storage.

Conclusions:

• Ga2O3 is a promising material for high-performance solar-blind photomemories.
• The developed device integrates sensing, storage, and processing capabilities.
• Potential applications in advanced information storage, computing, and communication systems.