Towards Detection of Helical Orientated Cellulose Structures in Wood Using THz Time-Domain Spectroscopy.

摘要: Wood is a fiber-reinforced, orthotropic composite material, which shows complex anisotropic optical characteristics induced by the preferential orientation of cellulose microfibrils in THz domain. We hypothesize that addition to their birefringent properties helical arrangement could also exhibit activity. This would allow determining microfibril angles wood, key feature for its mechanical properties. propose detect activity and birefringence independently using time-domain spectroscopy (THz-TDS) despite interference with annual ring structure. Our procedure based on Jones calculus formalism. In this report, we demonstrate ability left-and right-handed chirality prototype structures made copper wires spruce wood.