Terahertz absorber based on vanadium dioxide with high sensitivity and switching capability between ultra-wideband and ultra-narrowband

Abstract

The terahertz perfect absorber can be applied in the field of control, sensing and modulation of optical fields in micro- and nanostructures. However, it has a single function, complex device...

Actively tunable and switchable terahertz metamaterials with multi-band perfect absorption and polarization conversion

“…Therefore, it is desirable to design metamaterials with multi-functionality and tunability by combining with active materials, 27 such as two-dimensional materials, 28 phase change materials, 29,30 liquid crystals, 31 etc. Vanadium dioxide (VO 2 ), as a general phase change material, 32 has a conductivity that can be thermally controlled to achieve a change of 4–5 orders of magnitude. 33–35 In 2021, Wu et al designed a tunable broadband metamaterial perfect absorber by changing the temperature of VO 2 .…”

Spectrally Selective Ultra‐Broadband Solar Absorber Based on Pyramidal Structure

“…The perfect solar absorber should not only be spectrally selective but also have great thermal stability, a low thermal mass, and the ability to be mass produced. [10] Blackbody absorbers have a number of key properties, which are crucial in optoelectronics including solar cells, [11][12][13] photodetectors, [14][15][16] and imaging, [17][18][19] is light absorption. [20][21][22] The ideal optical blackbody possesses high optical absorbance, wide absorption band, angle of incidence, and polarization angle insensitivity properties.…”