Heating of Nanosized Liquid Water in High-Intensity Terahertz Pulses

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 ran...

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Published inChinese physics letters Vol. 33; no. 1; pp. 36 - 39
Main Author 黄自谦 杨荣瑶 蒋维洲 章其林
Format Journal Article
LanguageEnglish
Published 2016
Subjects
Absorption
Energy transfer
Frequency ranges
Heating
Mathematical models
Microwaves
Nanostructure
Water
共振频率
分子动力学模拟
太赫兹脉冲
水加热
液态
纳米级
能量传递效率
高强度
Online AccessGet full text
ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/33/1/013101

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Summary: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 562 K 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.
Bibliography:11-1959/O4
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 562 K 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.
Zi-Qian Hnang, Rong-Yao Yang, Wei-Zhou Jiang, Qi-Lin Zhang（ 1 Department of Physics, Southeast University, Nanjing 211189 ; 2Department of Physics, Guangxi Teachers Education University, Nanning 530023 ;3 Department of Mathematics and Physics, Anhui Polytechnic University, Wuhu 241000）
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/33/1/013101