Cross-wavelength invisibility integrated with various invisibility tactics

Area of Science:

• Metamaterials and Optics
• Advanced Materials Science

Background:

• Invisibility cloaking is a long-standing goal with potential applications in various fields.
• Achieving invisibility across multiple wavelengths (cross-wavelength) is challenging due to material dispersion.

Purpose of the Study:

• To propose and demonstrate a novel concept for cross-wavelength invisibility.
• To develop a design procedure for Boolean metamaterials that balance material requirements across different wavelengths.

Main Methods:

• Inspired by oceanic animal camouflage, a new invisibility concept integrating multiple tactics was developed.
• A Boolean metamaterial design procedure was employed to manage divergent material needs.
• Nanoimprinting techniques were used for experimental demonstration.

Main Results:

• Simultaneous longwave cloaking and shortwave transparency were experimentally achieved.
• The proposed method successfully integrated different invisibility tactics for cross-wavelength applications.

Conclusions:

• This work extends stealth techniques from single-wavelength to integrated cross-wavelength applications.
• The developed approach may enable the creation of advanced cross-wavelength integrated metadevices.