Damin Li, Su Yuan, Rongcao Yang, Jinping Tian, Wenmei Zhang. Dynamical Optical-Controlled Multi-State THz Metamaterial Absorber[J]. Acta Optica Sinica, 2020, 40(8): 0816001
- Acta Optica Sinica
- Vol. 40, Issue 8, 0816001 (2020)
Fig. 1. Schematic of the first absorber. (a) 5×5 array; (b) top view and (c) side view of unit structure
Fig. 2. Absorptivity of decomposition structure of the first absorber. (a) Square ring with outer-protrusions; (b) square ring with inner-protrusions; (c) two combined square rings; (d) two square rings connected by gold blocks
Fig. 3. Absorption curves and surface current distributions of the first absorber under different GaAs conductivities. (a) Dynamic absorption curves; surface current distributions at (b) 0.53 THz, (c) 1.32 THz, and (d) 0.686 THz
Fig. 4. Schematic of tunable multi-state absorber. (a) Top view and (b) side view of unit structure
Fig. 5. Absorption curves of the second absorber under different conditions. (a1) No pump light,σGaAs=100 S·m-1;(a2) 1550 nm pump light,σGaAs=1×103 S·m-1; (a3) 1550 nm pump light, σGaAs=2×103 S·m-1; (a4) 1550 nm pump light,σGaAs=5×103 S·m-1; (a5) 1550 nm pump light,σGaAs=1×104 S·m-1; (a6) 1550 nm pump light,σ
Fig. 6. Surface current distributions of the second absorber under different conditions. (a) No pump light, 0.518 THz; (b) no pump light, 0.906 THz;(c) no pump light, 1.514 THz; (d) 1500 nm pump light, 0.524 THz; (e) 1500 nm pump light, 1.106 THz; (f) 800 nm pump light, 0.706 THz
Fig. 7. Absorptivity of the second absorber versus polarization angle and incidence angle under different absorption modes. (a1)(b1)(c1) Triple-band absorption; (a2)(b2)(c2) dual-band absorption; (a3)(b3)(c3) single-band absorption
|
Table 1. Absorption properties of dynamically tunable multi-state metamaterial absorber
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20