Figure 4
From: Nonlinear terahertz devices utilizing semiconducting plasmonic metamaterials
PSMM absorber on flexible substrate. (a) Representative sketch of the flexible semiconductor-based metamaterial absorber. (b) Microscope image of the fabricated flexible absorber (scale bar=500 μm). (c) Close-up image of the rings. Rings have 30 μm outer and 15 μm inner radius on average with 72.7 μm hexagonal symmetry (scale bar=100 μm). (d) Terahertz-time-domain spectroscopy measurements showing the absorbance for increasing field strength. (e) Simulated absorbance spectra for Drude models with varying mobility and effective mass. (f) Simulated absorbance spectra of substrate-free absorber as a function of incidence angle (θ) for TE and TM polarized THz light.
