Configurable anti-ambipolar photoresponses for optoelectronic multi-valued logic gates
No Thumbnail Available
Access rights
embargoedAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2024-07-29
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
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
Keywords
Other note
Citation
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