Configurable anti-ambipolar photoresponses for optoelectronic multi-valued logic gates
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Applied Physics Letters, Volume 125, issue 5
Abstract
Anti-ambipolar transistors (AATs) are the leading platform for the paradigm shift from binary to multi-valued logic (MVL) circuits, increasing circuit integration density and data processing capacity. However, most AATs with p-n heterojunctions present limited controllability of the transconductance peak, which is key to MVL operation. Here, we report optically configurable AAT/bi-AAT photoresponses implemented with an InSe field-effect transistor for potential MVL operations. The charge trapping and detrapping processes incorporated with manually introduced trap states form the AAT peaks. Furthermore, leveraging a symmetric device configuration, the dark current is significantly suppressed, and AAT photoresponses are highlighted. Contributed by two pathways of trap states, the AAT/bi-AAT photoresponses are switchable by incident optical wavelength. This dependence facilitates optical wavelength to be one of the logic inputs for MVL, based on which we propose circuit-free ternary logic gates in a single device that can achieve more than ∼ 6 and ∼ 19 times improved data density (1 bit per transistor) for NMAX and XNOR, compared with such circuits in a traditional binary design. This work realizes optically controlled AAT photoresponses, paving the way to exploit optical wavelength as a new degree of freedom in MVL computing, offering a route toward ultra-high-density, ultra-low-power, and optically programmable optoelectronic integrated circuits.Description
Publisher Copyright: © 2024 Author(s). | openaire: EC/H2020/834742/EU//ATOP | openaire: EC/H2020/872049/EU//IPN-Bio | openaire: EC/HE/101067269/EU//ChirLog
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Cui, X, Kim, S, Ahmed, F, Du, M, Liapis, A C, Muñoz, J A, Shafi, A M, Uddin, M G, Ali, F, Zhang, Y, Kang, D H, Lipsanen, H, Kang, S, Yoon, H H & Sun, Z 2024, 'Configurable anti-ambipolar photoresponses for optoelectronic multi-valued logic gates', Applied Physics Letters, vol. 125, no. 5, 051105. https://doi.org/10.1063/5.0218591