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Research Article

Reconfigurable logic and in-sensor encryption operations in an asymmetrically tunable van der Waals heterostructure

Fan Gong1,2,§, Wenjie Deng1,2,§( ), Yi Wu1,2, Fengming Liu1,2, Yihao Guo1,2, Zelin Che1,2, Jingjie Li1,2, Jingzhen Li1,2, Yang Chai3, Yongzhe Zhang1,2( )
Key Laboratory of Optoelectronics Technology of Education Ministry of China, Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China
Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
Department of Applied Physics, Hong Kong Polytechnic University, Kowloon, Hong Kong, China

§ Fan Gong and Wenjie Deng contributed equally to this work.

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Graphical Abstract

We report an opto-electric reconfigurable device based on an asymmetric tunable WSe2/hexagonal boron nitride (h-BN)/SiO2 van der Waals (vdW) heterostructure. By switching theworking mode in such single device, the stable and sustainable reconstruction of logic XOR/notimplication (NIMP) and AND/OR can be realized through the programming operation. Wefurther demonstrated the application of in-sensor information encryption without anyconventional back-end algorithm.

Abstract

Reconfigurable devices can be used to achieve multiple logic operation and intelligent optical sensing with low power consumption, which is promising candidates for new generation electronic and optoelectronic integrated circuits. However, the versatility is still limited and need to be extended by the device architectures design. Here, we report an asymmetrically gate two-dimensional (2D) van der Waals heterostructure with hybrid dielectric layer SiO2/hexagonal boron nitride (h-BN), which enable rich function including reconfigurable logic operation and in-sensor information encryption enabled by both volatile and non-volatile optoelectrical modulation. When the partial gate is grounded, the non-volatile light assisted electrostatic doping endowed partially reconfigurable doping between n-type and p-type, which allow the switching of logic XOR and not implication (NIMP). When the global gate is grounded, additionally taking the optical signal as another input signal, logic AND and OR is realized by combined regulation of the light and localized gate voltage. Depending on the high on/off current ratio approaching 105 and reliable & switchable logic gate, in-sensor information encryption and decryption is demonstrated by manipulating the logic output. Hence, these results provide strong extension for current reconfigurable electronic and optoelectronic devices.

Keywords

in-sensor encryptionreconfigurable logicvan der Waals heterostructureasymmetrical tunable architecture

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Nano Research
Volume 17 Issue 4,
April 2024
Pages 3113-3119
DOI: 10.1007/s12274-023-6234-9
Cite this article:
Gong F, Deng W, Wu Y, et al. Reconfigurable logic and in-sensor encryption operations in an asymmetrically tunable van der Waals heterostructure. Nano Research, 2024, 17(4): 3113-3119. https://doi.org/10.1007/s12274-023-6234-9
Topics:
PhotodetectorsSemiconductor devices Thin film transistors

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Received: 20 June 2023
Revised: 19 September 2023
Accepted: 26 September 2023
Published: 07 November 2023
© Tsinghua University Press 2023
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