Dual-tuned terahertz cloaking via two-layer semiconductor.

Area of Science:

• * Metamaterials and Nanophotonics
• * Electromagnetic Wave Manipulation
• * Terahertz Technology

Background:

• * Electromagnetic cloaking is a rapidly advancing field with significant research interest.
• * Scattering Cancellation Cloaking (SCC) technology offers a pathway to achieving invisibility.
• * Tuning cloaking properties with external stimuli is crucial for practical applications.

Purpose of the Study:

• * To design and investigate a dual-tuned terahertz plasmonic cloak.
• * To explore the simultaneous tuning of cloaking frequencies using pressure and temperature.
• * To demonstrate the feasibility of multi-parameter-tuned SCC.

Main Methods:

• * Utilized a two-layer cloak composed of isotropic and homogeneous semiconductors (GaAs and InAs).
• * Employed Scattering Cancellation Cloaking (SCC) principles.
• * Applied the finite element method for theoretical calculations and numerical simulations.

Main Results:

• * Achieved simultaneous tuning of two terahertz cloaking frequencies.
• * Demonstrated temperature-dependent tuning of the low best cloaking frequency (LBCF) from 2.86 to 5.60 THz (450–550 K).
• * Showcased pressure-dependent tuning of the high best cloaking frequency (HBCF) from 8.46 to 9.47 THz (0–10 GPa).

Conclusions:

• * The designed plasmonic cloak successfully achieves dual-tuned terahertz cloaking.
• * Dielectric properties of GaAs and InAs can be modulated by temperature and pressure, respectively.
• * This work provides a novel approach for designing multi-layer cloaks with multi-parameter tunability.