About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
2D Materials: Synthesis, Properties, and Applications
|
| Presentation Title |
Broadband Optical Synapses Enabled by Wafer-Scale Flexible 2D PtSe₂ Arrays |
| Author(s) |
Sang Sub Han, Jung Han Kim, Hee-Suk Chung, Yeonwoong Jung |
| On-Site Speaker (Planned) |
Sang Sub Han |
| Abstract Scope |
Broadband optical synapses offer a compelling route toward energy-efficient neuromorphic hardware beyond conventional von Neumann systems. In this work, we present fully optical synaptic functionalities in wafer-scale, flexible 2D PtSe₂ arrays synthesized via chemical vapor deposition. These arrays exhibit bidirectional photo-responsivity: positive photoconductivity under red–infrared light (625–940 nm) and negative photoconductivity under blue light (405 nm). This wavelength-tunable behavior enables essential synaptic functions including excitatory/inhibitory post-synaptic currents (EPSC/IPSC), paired-pulse facilitation, and transitions between short/long-term plasticity. Notably, the devices retain stable performance under mechanical bending, allowing for flexible implementation of logic gates and Pavlovian learning. The wafer-scale arrays also demonstrate high device uniformity and optical pattern recognition capability. These findings establish 2D PtSe₂ arrays as a promising platform for broadband, reconfigurable, and fully optical neuromorphic systems. |