High‐Gain PMMA‐Modified Graphene Photodetectors for Dual‐Wavelength Secure Communication Utilizing Distinct Temporal Photoresponses DOI Creative Commons

Jinhua Wu,

Hao Sun, Ruiling Zhang

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: May 11, 2025

Abstract Photodetectors exhibiting oppositive polar responses at two different wavelengths have been used extensively for secure optical communication. However, current technologies are susceptible to signal cancellation and cross‐talk, due the time‐independent of equal strengths. In this study, a encryption system based on PMMA‐modified graphene (PMG) photodetector is demonstrated that shows remarkable wavelength‐dependent temporal responses: PMG detector largely constant response longer than 580 nm, while linear time dependence shorter wavelengths. It found qualitatively attributed photogating effects PMMA‐mediated oxygen desorption process, respectively. Moreover, device achieves exceptionally large normalized‐gain values 2.18 × 10 −3 m 2 V −1 2.97 −‍5 ‍m −‍1 cases, respectively, both surpassing previously reported by an order magnitude bipolar responsive photodetectors in ambient conditions. By harnessing these distinct photoresponses as encrypted key signals wavelengths, effective communication enhances recovery avoids cancellation. The research introduces straightforward yet efficient structural design with temporally specific represents significant advancement field

Language: Английский

Reconfigurable Ion-Migration Driven Memristor for Multistate Neuromorphic Associative Learning DOI

Jiaji Yang,

Xin Li, Jinfeng Gu

et al.

ACS Photonics, Journal Year: 2025, Volume and Issue: unknown

Published: March 2, 2025

Language: Английский

Citations

1
High‐Gain PMMA‐Modified Graphene Photodetectors for Dual‐Wavelength Secure Communication Utilizing Distinct Temporal Photoresponses DOI Creative Commons

Jinhua Wu,

Hao Sun, Ruiling Zhang

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: May 11, 2025

Abstract Photodetectors exhibiting oppositive polar responses at two different wavelengths have been used extensively for secure optical communication. However, current technologies are susceptible to signal cancellation and cross‐talk, due the time‐independent of equal strengths. In this study, a encryption system based on PMMA‐modified graphene (PMG) photodetector is demonstrated that shows remarkable wavelength‐dependent temporal responses: PMG detector largely constant response longer than 580 nm, while linear time dependence shorter wavelengths. It found qualitatively attributed photogating effects PMMA‐mediated oxygen desorption process, respectively. Moreover, device achieves exceptionally large normalized‐gain values 2.18 × 10 −3 m 2 V −1 2.97 −‍5 ‍m −‍1 cases, respectively, both surpassing previously reported by an order magnitude bipolar responsive photodetectors in ambient conditions. By harnessing these distinct photoresponses as encrypted key signals wavelengths, effective communication enhances recovery avoids cancellation. The research introduces straightforward yet efficient structural design with temporally specific represents significant advancement field

Language: Английский

Citations

0