Lithography-free thermal camouflage device with efficient thermal management for ultrahigh-temperature objects

Applied Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 126031 - 126031

Published: Feb. 1, 2025

Language: Английский

Polarization-Sensitive Long-Wavelength Infrared Narrowband Thermal Emitter for Anticounterfeiting

ACS Applied Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Tailoring the wavelength, bandwidth, directionality, and polarization of thermal radiation is critical for various applications like infrared camouflage, radiative cooling, gas sensing. In this work, we present a deep-subwavelength bilayer structure that serves as long-wavelength (LWIR) narrow-band emitter with selectivity. The proposed LWIR basically consists tungsten oxide (WO3) polar dielectric layer upon an opaque gold (Au) ground plane. Transfer matrix method (TMM) calculations are employed to analytically investigate optical responses emitter. Leveraging Berreman mode near longitudinal (LO) phonon energy WO3, experimentally realizes high absorption (97.6%) TM-polarized state low (4.2%) TE-polarized (at incident angle 60° wavelength 10.12 μm), which shows good agreement theoretical results. Such excellent polarization-sensitive performance makes our very promising security features, information encryption, anticounterfeiting.

Language: Английский

Special issue: “Metamaterials and Plasmonics in Asia”

Nanophotonics, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Language: Английский