Qinglong Meng, Yan Zhang, Bin Zhang, Jing Shang. Characteristics of Optically Tunable Multi-Band Terahertz Metamaterial Absorber[J]. Laser & Optoelectronics Progress, 2019, 56(10): 101603
- Laser & Optoelectronics Progress
- Vol. 56, Issue 10, 101603 (2019)
Fig. 1. Structural diagram of metamaterial absorber. (a) Tuning principle; (b) unit cell of absorber; (c) side view of unit cell
Fig. 2. Conductivity distribution in GaAs semiconductor material. (a) Two-dimensional distribution; (b) one-dimensional distribution
Fig. 3. Variation of conductivity versus pump laser fluence
Fig. 4. Absorption spectra of metamaterial absorber composed of only single metallic bar
Fig. 5. Absorption spectra of metamaterial absorber composed of four metallic bars with different lengths
Fig. 6. Comparison of absorption spectra of different metamaterial absorbers
Fig. 7. Electric field distributions of metamaterial absorber at different resonance frequencies. (a) f1=2.96 THz; (b) f2=2.69 THz; (c) f3=2.43 THz; (d) f4=2.15 THz
Fig. 8. Normalized absorption spectra of metamaterial absorber as function of conductivity of filling dielectric
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Table 1. Parameters of GaAs semiconductor material
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