Laser & Optoelectronics Progress, Volume. 62, Issue 3, 0316001(2025)

Evolution of Dual Optical Bandgap in Vanadium Pentoxide Thin Films for Multifrequency Absorption

Yunkai Shao1,2,3、*, Linkui Niu2, Tiantian Huang2, Wanli Yang1, Xin Chen2, and Ning Dai1,2,3
Author Affiliations
  • 1Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310020, Zhejiang , China
  • 2State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
  • 3University of Chinese Academy of Sciences, Beijing 100049, China
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    This work investigates the temperature-responsive optical characteristics of vanadium oxide nanocrystals fabricated by plasma-enhanced atomic layer deposition (PEALD). Analysis of the films' absorption and ellipsoid spectra reveals a dual optical bandgap, linked to the evolving surface microstructure during film growth. Notably, variable-temperature absorption spectrum analysis shows these bandgaps respond differently to temperature shifts, revealing the microstructure's critical influence on optical performance. The research pioneers a novel method for tuning the optical properties of 2D vanadium oxide films through microstructural manipulation. This contributes to the scientific understanding and provides a foundation for developing functional films capable of dynamic dual-band light absorption regulation.

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    Yunkai Shao, Linkui Niu, Tiantian Huang, Wanli Yang, Xin Chen, Ning Dai. Evolution of Dual Optical Bandgap in Vanadium Pentoxide Thin Films for Multifrequency Absorption[J]. Laser & Optoelectronics Progress, 2025, 62(3): 0316001

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    Paper Information

    Category: Materials

    Received: May. 16, 2024

    Accepted: May. 28, 2024

    Published Online: Feb. 24, 2025

    The Author Email:

    DOI:10.3788/LOP241290

    CSTR:32186.14.LOP241290

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