连续介质上轻压的宏观观
Macroscopic view of light pressure on continuous medium
摘要：
连续介质上轻压宏观描述的不确定性源于将电磁激发物质的能量-动量张量分为物质和场部分或等效地将总作用力分为压力和变形项的不确定性。我们表明，虽然存在一个连续的形式上正确的配方，可以采用适当的形式的宏观场应力张量，允许统一描述的压力在基本的光-物质相互作用，如反射/折射，吸收和非线性转换。所提出的压力表达式简单、方便，并且与极化子动量$\hbar \bf k$相容。相应的电磁动量密度（14）推广了Rytov对右手和左手频率色散介质的定义。
英文摘要：
The ambiguity of macroscopic description of light pressure on continuous medium originates from the uncertainty of dividing the energy-momentum tensor of electromagnetically excited matter into material and field parts or, equivalently, the total acting force into pressure and deformation terms. We show that although there exists a continuum of formally correct formulations, one can adopt the appropriate form of the macroscopic field stress tensor that allows unified description of pressure during elementary light-matter interactions, such as reflection/refraction, absorption and nonlinear conversion. The proposed expressions for the pressure force are simple, convenient and compatible with the polariton momentum $\hbar \bf k$. The corresponding electromagnetic momentum density (14) generalizes Rytov's definition for right-handed and left-handed frequency dispersive media.
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