An ultra-broadband and wide-angle absorber based on a TiN metamaterial for solar harvesting

Abstract

The efficient absorption of solar spectrum radiation is the most critical step in solar thermal utilization. In this work, a near-perfect metamaterial solar absorber with broadband, wide angle, polarization insensitivity,...

Pattern-free solar absorber driven by superposed Fabry–Perot resonances

“…[10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] So far, numerous efforts have been devoted to designing metamaterial solar absorbers for effectively harvesting solar irradiation. [25][26][27][28][29][30][31][32][33] For instance, Yu et al designed an ultra-broadband solar absorber based on refractory titanium with a better performance. 9 Based on surface plasmon resonance, the absorber showed an average absorption of 92.7% in the studied absorption spectrum (166.8-1926.6 nm).…”

A tunable infrared emitter based on phase-changing material GST for visible-infrared compatible camouflage with thermal management

“…An object at a temperature higher than absolute zero (0 K) continuously radiates electromagnetic waves into free space, and this phenomenon is known as thermal radiation. 1 Therefore, the ability to control thermal radiation in the near-and far-field is essential for some practical applications, including solar energy harvesting, 2,3 infrared camouflage, 4 spacecraft thermal control devices, 5 near-field radiative heat transfer, 6 and passive daytime radiative cooling. 7 According to Planck's blackbody radiation law, the thermal radiation spectra of most objects are mainly located in the infrared bands.…”

A polarization-dependent perfect absorber with high Q-factors enabled by Tamm phonon polaritons in hyperbolic materials

“…7–9 Traditional absorbers are polarization-independent due to their in-plane rotational symmetry. 10–12 However, the polarization-insensitive absorber cannot capture polarization information, which needs to be further improved in the fields of optical sensing, 13,14 photodetection 15,16 and optical communication. 17,18…”

“…[7][8][9] Traditional absorbers are polarizationindependent due to their in-plane rotational symmetry. [10][11][12] However, the polarization-insensitive absorber cannot capture polarization information, which needs to be further improved in the fields of optical sensing, 13,14 photodetection 15,16 and optical communication. 17,18 Polarization-dependent absorbers have recently attracted great interest from researchers because they can effectively utilize polarization to actively regulate light absorption and have potential application prospects in fields such as polarization imaging, [19][20][21][22][23][24] high contrast polarizers, 25,26 polarization sensing 27,28 and optical radars.…”