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journal article·2026-02Open access

Compact Optical Reservoir Computing via Luminescence Dynamics in Rare‐Earth Ions‐Doped Nanocrystals

Junyan Chen, Jingsong Fu, Jie Xu, Yixiang Qin, Axin Du, Kaiyang Wang, Limin Jin, Can Huang

Advanced Science· Volume 13· Issue 7
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Source abstract

Abstract

Abstract Optical neuromorphic computing offers a promising route to high‐speed, energy‐efficient information processing. However, photonic neurons, as the critical components for enhancing computational expressivity, still face significant bottlenecks in nonlinear mapping and memory capacity. Here, a functionally compact optical reservoir computing system based on rare‐earth ions‐doped nanocrystals is demonstrated, leveraging their intrinsic nonlinear luminescence dynamics and multi‐timescale memory. Unlike traditional schemes that require bulky optical delays or intricate resonant structures, the platform exploits the material's inherent properties: nonlinear cross‐relaxation processes enable nonlinear mapping while long‐lived metastable energy levels provide fading memory. As a proof of concept, 90.7% accuracy is achieved in MNIST digit classification and low‐error chaotic time‐series prediction (NRMSE < 0.1) using the rare‐earth ions‐based system. This work significantly reduces system footprint and complexity, offering a scalable, fully optical solution for edge computing and real‐time neuromorphic applications.
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Research context

Nanomaterials

OpenAlex topics: Neural Networks and Reservoir Computing · Ferroelectric and Negative Capacitance Devices · Advanced Memory and Neural Computing

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Ministry of Industry and Information Technology Key Lab of Micro‐Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Harbin Institute of Technology Shenzhen 518055 China

Shenzhen Key Laboratory of New Materials Technology Shenzhen 518055 China

Quantum Science Center of Guangdong‐Hongkong Macao Greater Bay Area Shenzhen 518055 China

Heilongjiang Provincial Key Laboratory of Advanced Quantum Functional Materials and Sensor devices Harbin Institute of Technology Harbin 150001 China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Basic and Applied Basic Research Foundation of Guangdong Province · Fundamental Research Funds for the Central Universities · Shenzhen Science and Technology Innovation Program

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