Temperature-Dependent Far-Infrared Absorption in Cyclotrimethylene Trinitramine Single Crystals Using Broadband Time-Domain Terahertz Spectroscopy
Yupeng Liu1 , Jinchun Shi2 , and Chongyang Chen1*
1 Institute of Modern Physics, Fudan University, Shanghai 200433, China2 The Peac Institute of Multiscale Sciences, Chengdu 610031, China
Abstract ：We investigate the absorption properties of cyclotrimethylene trinitramine (RDX) single crystals from $\sim$15 to 150 cm$^{-1}$ using the terahertz time-domain spectroscopy. We observe that all the absorption modes exhibit strong anisotropic behavior in terms of the crystal orientations. We demonstrate that the anharmonic phonon model can well describe the temperature-dependent behaviors of these absorption modes. These results indicate that the intermolecular interaction plays a major role in the collective motion of large number of RDX molecules. Our findings provide important information for understanding and controlling the dynamic properties in the explosive materials.
收稿日期: 2021-09-22
出版日期: 2021-12-29
:
87.50.U
(Millimeter/terahertz fields effects)
78.40.-q
(Absorption and reflection spectra: visible and ultraviolet)
63.20.-e
(Phonons in crystal lattices)
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