Yiqin Kuang, Gang Li, Zhuqing Yan, Yanjun Zhang, Zhidong Zhang, Xianwei Hao. Absorption and Refractive Index Sensitivity of the I-Shaped Elliptical Nanostructures[J]. Acta Optica Sinica, 2020, 40(14): 1424001
- Acta Optica Sinica
- Vol. 40, Issue 14, 1424001 (2020)
Fig. 1. Schematic diagram of absorber structure. (a) Three-dimensional illustration of an oval disc perfect absorber; (b) top view of unit cell
Fig. 2. Absorption spectra with gold substrate (solid line) and without gold substrate (dotted line)
Fig. 3. Electric field distributions at different wavelengths. (a)--(d) Electric field distributions in the yz plane corresponding to the wavelengths I, II, III, and IV, respectively; (e)--(h) electric field distributions in the xy plane corresponding to the wavelengths I, II, III, and IV, respectively
Fig. 4. Effects of different structural parameters on absorption spectra. (a) Different distances d; (b) different column heights h; (c) different short axes w1; (d) different major axes l1; (e) different minor axes w2; (f) different major axes l2
Fig. 5. Effects of different angles and structures on absorption spectra. (a) Different angles; (b) different structures
Fig. 6. Effect of external environment refractive index n on absorption spectra. (a) Different external environment refractive index n; (b) relationship between the change of the external environment refractive index n and the change of the peak position of the absorption spectra
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