中国物理B ›› 2020, Vol. 29 ›› Issue (10): 104210-.doi: 10.1088/1674-1056/abab78

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Yuanlin Jia(贾渊琳)1, Peiwen Ren(任佩雯)1, Chunzhen Fan(范春珍)1,†()   

  • 收稿日期:2020-05-10 修回日期:2020-06-05 接受日期:2020-08-01 出版日期:2020-10-05 发布日期:2020-10-05
  • 通讯作者: Chunzhen Fan(范春珍)

Thermal tunable one-dimensional photonic crystals containing phase change material

Yuanlin Jia(贾渊琳), Peiwen Ren(任佩雯), and Chunzhen Fan(范春珍)†   

  1. 1 School of Physics and Microstructures, Zhengzhou University, Zhengzhou 450001, China
  • Received:2020-05-10 Revised:2020-06-05 Accepted:2020-08-01 Online:2020-10-05 Published:2020-10-05
  • Contact: Corresponding author. E-mail: chunzhen@zzu.edu.cn
  • About author:
    †Corresponding author. E-mail: chunzhen@zzu.edu.cn
    * Project supported by the Key Science and Technology Research Project of Henan Province, China (Grant No. 1721023100107).

Abstract:

To obtain the adjustable photonic crystals (PCs), we numerically investigate one-dimensional (1D) PCs with alternating VO2 and SiO2 layers through transfer matrix method. The dispersion relation agrees well with the transmittance obtained by the finite element calculation. Tunable band gaps are achieved with the thermal stimuli of VO2, which has two crystal structures. The monoclinic crystal structure VO2 (R) at low temperature exhibits insulating property, and the high temperature square rutile structure VO2 (M) presents metal state. Concretely, the bandwidth is getting narrower and red shift occurs with the higher temperature in VO2 (R)/SiO2 PCs structure. Based on the phase change characteristics of VO2, we can flexibly adjust the original structure as VO2 (R)/VO2 (M)/SiO2. By increasing the phase ratio of VO2 (R) to VO2 (M), the band gap width gradually becomes wider and blue shift occurs. The discrete layers of gradient composites on the dispersion of 1D PCs are also investigated, which enhances the feasibility in practical operation. Thus, our proposed thermal modulation PCs structure paves a new way to realize thermal tunable optical filters and sensors.

Key words: photonic crystals, VO2, thermal modulation, phase change

中图分类号:  (Photonic bandgap materials)

  • 42.70.Qs
42.25.Bs (Wave propagation, transmission and absorption) 81.30.Dz (Phase diagrams of other materials) 42.79.Ci (Filters, zone plates, and polarizers)