Heating of Nanosized Liquid Water in High-Intensity Terahertz Pulses
Heating of Nanosized Liquid Water in High-Intensity Terahertz Pulses
复制标题
高强度太赫兹脉冲加热纳米液态水
DOI：
10.1088/0256-307x/33/1/013101
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发表时间：
2016
影响因子：
3.5
通讯作者：
黄自谦
中科院分区：
文献类型：
--
作者：
黄自谦
使用非极化电位模型对皮秒高功率太赫兹脉冲中的液态水进行非平衡分子动力学模拟。数值结果表明，水分子的能量吸收在14-17 THz频率范围内与太赫兹脉冲表现出明显的共振。使用谐振频率的太赫兹脉冲，在室温下加热水的最高温度约为 562K。进一步的研究表明，结果与纳米级水箱的尺寸无关。共振吸收能量传递效率是微波加热的七倍以上。这些研究表明超短太赫兹脉冲的应用前景广阔。
Non-equilibrium molecular dynamics simulations of liquid water in picosecond high-power terahertz pulses are performed by using a non-polarizable potential model. Numerical results show that the energy absorption of water molecules exhibits a pronounced resonance with THz pulses in the frequency range of 14-17 THz. With the THz pulse at resonant frequencies, the maximum temperature is about 562K by heating the water at room temperature. Further investigation indicates that the results are independent of the size of the nanoscale water box. The efficiency of energy transfer by resonant absorption is more than seven times of microwave heating. These studies show promising applications of ultrashort THz pulses.