Switchable Broadband Terahertz Absorbers Based on Conducting Polymer-Cellulose Aerogels.

ABSTRACT: Terahertz (THz) technologies provide opportunities ranging from calibration targets for satellites and telescopes to communication devices and biomedical imaging systems. A main component will be broadband THz absorbers with switchability. However, optically switchable materials in THz are scarce and their modulation is mostly available at narrow bandwidths. Realizing materials with large and broadband modulation in absorption or transmission forms a critical challenge. This study demonstrates that conducting polymer-cellulose aerogels can provide modulation of broadband THz light with large modulation range from ≈ 13% to 91% absolute transmission, while maintaining specular reflection loss < -30 dB. The exceptional THz modulation is associated with the anomalous optical conductivity peak

SUBMITTER: Kuang C 

PROVIDER: S-EPMC10797431 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature