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Bioinspired Disordered Aerogel for Omnidirectional Terahertz Response.

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Summary

Inspired by butterfly wings, disordered aerogels offer exceptional terahertz wave absorption. These materials exhibit angle-insensitive, ultra-broadband properties for advanced terahertz applications.

Keywords:
disorder poresincidence‐angle‐insensitiveresonance effectstructural optimizationterahertz response behavior

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electromagnetics

Background:

  • Biomimetic designs, inspired by natural structures like butterfly wings, offer unique optical properties.
  • Terahertz (THz) waves require advanced materials for efficient absorption and manipulation.
  • Disordered structures can enhance light-harvesting capabilities across wide spectral and angular ranges.

Purpose of the Study:

  • To design and optimize disordered aerogels for superior terahertz wave absorption.
  • To investigate the relationship between structural disorder and terahertz response.
  • To develop a versatile platform for terahertz applications using biomimetic strategies.

Main Methods:

  • Electromagnetic simulations to analyze terahertz wave interaction with disordered micro-pores.
  • Ice templating technology for the fabrication of customized aerogels.
  • Characterization of aerogel properties including shielding effectiveness and reflection loss.

Main Results:

  • Optimized disordered aerogels demonstrated incidence-angle-insensitive and ultra-broadband terahertz response.
  • Ti3C2Tx MXene/carboxymethyl cellulose aerogels achieved shielding effectiveness >70.32 dB and reflection loss >43.02 dB from 0.3-1.5 THz.
  • Tailoring structural orientation enabled dynamic modulation of terahertz propagation.

Conclusions:

  • Biomimetic disordered aerogels provide a promising solution for efficient terahertz wave absorption.
  • The developed aerogels exhibit excellent performance for applications requiring stealth and broadband absorption.
  • This strategy opens avenues for advanced terahertz technologies including imaging, communication, and encryption.