基于黑色层纳米薄膜的可重构可见光滤波器  

A Reconfigurable Visible Light Filter Based on Nanofilms with a Black Layer

作　　者：张金英 王瑞[1,2] 王炳楠 郝凯子 李德芳 李卓 王欣[1,2] 杨苏辉 Zhang Jinying;Wang Rui;Wang Bingnan;Hao Kaizi;Li Defang;Li Zhuo;Wang Xin;Yang Suhui(School of Optics and Photonics,Beijing Institute of Technology,Beijing100081,China;Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology,Beijing100081,China)

机构地区：[1]北京理工大学光电学院,北京100081 [2]精密光电测试仪器及技术北京市重点实验室,北京100081

出　　处：《光学学报》2021年第22期236-243,共8页Acta Optica Sinica

基　　金：国家重点研发计划(2018AAA0100301,2018YFF01010304);国家自然科学基金(61704166,61875011);北京理工大学学术启动计划(201904006);中国博士后科学基金(2020TQ0036)。

摘　　要：基于铁电材料的介电可调特性,提出一种新颖的基于黑色层纳米薄膜的可重构可见光滤波器,并比较了它与一维光子晶体滤波器反射光谱的可重构特性。实验结果表明,利用黑色层吸收非相干散射光可显著提高反射颜色对比度。当钛酸钡(BTO)薄膜的厚度从100 nm变为140 nm时,反射光谱的峰值波长由383.7 nm移动至501.2 nm,纳米薄膜的反射颜色从紫色变为蓝绿色。反射光谱的测试结果与有限元的模拟结果一致性良好。计算结果表明,当BTO薄膜的厚度为170 nm时,在21.8 V直流驱动电压下,其折射率由2.4变化至2.0,反射峰值波长由595.3 nm移动至513.9 nm。A novel reconfigurable visible light filter based on nanofilms with a black layer was proposed in view of the tunable dielectric properties of ferroelectric materials.The reconfigurable performance of its reflection spectrum was compared with that of the one-dimensional photonic crystal filter.The experimental results demonstrate that the reflection color contrast is significantly improved by the black layer that absorbs the incoherent scattered light.When the thickness of the barium titanate(BTO)film changes from 100 nm to 140 nm,the peak wavelength of the reflection spectrum shifts from 383.7 nm to 501.2 nm,and the reflection color turns from purple to turquoise.The test results of the reflection spectra are in good agreement with the finite element simulation outcomes.According to the numerical results,when the BTO film is 170 nm thick,its refractive index decreases from 2.4 to 2.0 under 21.8 V direct-current(DC)driving voltage.Consequently,the peak wavelength of the reflection spectrum shifts from 595.3 nm to 513.9 nm.

关 键 词：薄膜 可见光滤波器 可重构 一维光子晶体 钛酸钡 黑色层 

分 类 号：TN202[电子电信—物理电子学]