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Open AccessCommunication
Tunable Plasmonic Bandwidth Broadening via DC Electrical Bias
by
Chen Wei
Chen Wei
Fuhua Gao
Fuhua Gao
Prof. Fuhua Gao is the deputy director of the Key Laboratory of High Energy Density Physics and of [...]
Prof. Fuhua Gao is the deputy director of the Key Laboratory of High Energy Density Physics and Technology of the Ministry of Education. He received his B.Sc. in microelectronics in 1998 and his Ph.D. in optics in 2003, both from Sichuan University. From 2003 to 2005, he worked at the Postdoctoral Mobile Station of Materials Science and Engineering at Sichuan University. In July 2005, he was hired by the Department of Physics of Sichuan University to
teach and conduct scientific research in the field of optics. His research topics mainly include high-precision optical processing and detection technology, laser shaping and control, and diffraction optical design and application.
and
Fan Yang
Fan Yang
College of Physics and Key Laboratory of High Energy Density Physics and Technology of the Ministry of Education, Sichuan University, Chengdu 610065, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2025, 15(11), 794; https://doi.org/10.3390/nano15110794 (registering DOI)
Submission received: 12 April 2025
/
Revised: 10 May 2025
/
Accepted: 23 May 2025
/
Published: 25 May 2025
Abstract
The ability to broaden the bandwidth of nanodevices holds significant promise for applications in modern science and technology. In this work, we demonstrate a tunable approach to the bandwidth modulation of nanoresonators by applying a direct current electric field. Quantum hydrodynamic theory reveals that the biased electric field redistributes surface charges, inducing positively and negatively charged regions on the metal surface. This charge asymmetry splits the plasmonic modes, resulting in bandwidth broadening. The optical response can be finely tuned by varying the amplitude and polarization direction of the bias field. This mechanism offers a versatile strategy for developing nanodevices, including metasurfaces with dynamically adjustable bandwidths.
Share and Cite
MDPI and ACS Style
Wei, C.; Gao, F.; Yang, F.
Tunable Plasmonic Bandwidth Broadening via DC Electrical Bias. Nanomaterials 2025, 15, 794.
https://doi.org/10.3390/nano15110794
AMA Style
Wei C, Gao F, Yang F.
Tunable Plasmonic Bandwidth Broadening via DC Electrical Bias. Nanomaterials. 2025; 15(11):794.
https://doi.org/10.3390/nano15110794
Chicago/Turabian Style
Wei, Chen, Fuhua Gao, and Fan Yang.
2025. "Tunable Plasmonic Bandwidth Broadening via DC Electrical Bias" Nanomaterials 15, no. 11: 794.
https://doi.org/10.3390/nano15110794
APA Style
Wei, C., Gao, F., & Yang, F.
(2025). Tunable Plasmonic Bandwidth Broadening via DC Electrical Bias. Nanomaterials, 15(11), 794.
https://doi.org/10.3390/nano15110794
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