講演情報
[15p-S4_201-2]Polymer-Hexaferrite Composite Films for Terahertz Absorber Applications
〇Justin LLANDRO1,2, Zhehong LIU2,3, Yoshito MURATA4, Yoshihiro OKAMURA4, Yasujiro TAGUCHI2,3, Youtarou TAKAHASHI3,4, Yoshinori TOKURA3,4,5, Satoshi OKAMOTO1,2 (1.Sumitomo Chemical, 2.RIKEN BZP, 3.RIKEN CEMS, 4.Univ. Tokyo, 5.Tokyo College)
キーワード：
terahertz absorber、polymer、hexaferrite
Terahertz radiation is currently attracting attention in fields including medicine and security scanning. Of particular interest for such applications are absorbers which are effective at low thickness and large area over a wide frequency band below 1 THz. Such requirements are challenging for current approaches based on terahertz resonances (e.g. 3D metamaterials) and polymer composites with conductive fillers.
Here, we present wide-band absorption in composites where both matrix and filler exhibit terahertz activity, based on the polar polymer PES (polyethersulfone) and micron-sized particles of multiferroic Y-type hexaferrite, which in bulk exhibits resonant absorption via electromagnon generation. A 2.64 mm thick composite film containing only 5%vol. of Ba0.8Sr1.2Co1.5Fe11.5Al1.0O22 is shown to achieve 30dB absorption above 0.79 THz. Work is ongoing to elucidate filler-matrix interactions in PES/multiferroic composites to achieve high absorption in the region 0.3- 0.5 THz.
Here, we present wide-band absorption in composites where both matrix and filler exhibit terahertz activity, based on the polar polymer PES (polyethersulfone) and micron-sized particles of multiferroic Y-type hexaferrite, which in bulk exhibits resonant absorption via electromagnon generation. A 2.64 mm thick composite film containing only 5%vol. of Ba0.8Sr1.2Co1.5Fe11.5Al1.0O22 is shown to achieve 30dB absorption above 0.79 THz. Work is ongoing to elucidate filler-matrix interactions in PES/multiferroic composites to achieve high absorption in the region 0.3- 0.5 THz.