材料科学
光子晶体
透射率
可见光谱
光电子学
红外线的
结构着色
时域有限差分法
光子学
波长
光学
调制(音乐)
哲学
物理
美学
作者
Yujie Ke,Igal Balin,Ning Wang,Qi Lu,Alfred Iing Yoong Tok,Timothy J. White,Shlomo Magdassi,Ibrahim Abdulhalim,Yi Long
标识
DOI:10.1021/acsami.6b12175
摘要
Two-dimensional (2D) photonic structures, widely used for generating photonic band gaps (PBG) in a variety of materials, are for the first time integrated with the temperature-dependent phase change of vanadium dioxide (VO2). VO2 possesses thermochromic properties, whose potential remains unrealized due to an undesirable yellow-brown color. Here, a SiO2/VO2 core/shell 2D photonic crystal is demonstrated to exhibit static visible light tunability and dynamic near-infrared (NIR) modulation. Three-dimensional (3D) finite difference time domain (FDTD) simulations predict that the transmittance can be tuned across the visible spectrum, while maintaining good solar regulation efficiency (ΔTsol = 11.0%) and high solar transmittance (Tlum = 49.6%). Experiments show that the color changes of VO2 films are accompanied by NIR modulation. This work presents a novel way to manipulate VO2 photonic structures to modulate light transmission as a function of wavelength at different temperatures.
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