The National Institute of Advanced Industrial Science and Technology (AIST) has developed a terahertz wave absorber that has both high terahertz wave absorption and fast thermal response, as well as excellent manufacturability.
In this research, we devised a three-dimensional hollow structure that achieves high absorption rate and rapid temperature rise, and fabricated the structure using 3D printing and electroless plating technology. As a result of evaluation, we achieved an absorption rate of over 99% in the 6G band, and a temperature rise rate that is more than twice that of conventional products.
A terahertz wave power sensor determines the absolute intensity of terahertz waves by having an absorber convert the terahertz waves into heat and detecting the temperature rise at that time. Therefore, in order to realize a terahertz wave power sensor with high measurement accuracy and fast response, an absorber with excellent absorption rate and temperature rise rate is required. However, the problem with conventional absorbers is that they are unable to achieve both high absorption rate and high temperature rise rate for terahertz waves in the 6G band, which is attracting attention as the foundation of next-generation communication technology.