A Soft Composite Thermal Emitter with High Efficiency in Broadband Infrared Spectrum

This paper presents a soft composite visible to infrared thermal emitter combined micro-structured polymer thin film with nano-forest structure of metallic film. The proposed composite configuration exhibits reduced reflection (below 7%) and enhanced absorption (above 93%) in a broadband visible spectrum from 300 nm to 800 nm. Moreover, it guarantees high efficiency emission in broadband infrared spectrum. A simple, low-cost and effective approach is investigated to obtain a soft visible-infrared transducer which will be a desired candidate as thermal emitters. The simulated and measured results demonstrate that the random cone configurations on the transducer show dominant superiority in the enhancement of absorbing/emitting efficiency and in the enlargement of absorbing spectrum.