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Terahertz wave generating device, optical parametric amplifier, terahertz wave detector, and nonlinear optical element
Terahertz wave generating device, optical parametric amplifier, terahertz wave detector, and nonlinear optical element
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机译：太赫兹波产生装置，光参量放大器，太赫兹波检测器和非线性光学元件
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摘要
In order to accomplish highly-efficient nonlinear optical wavelength conversion for terahertz waves by using a simple configuration, an embodiment of the present invention provides a terahertz wave generating device 100 provided with a pump light source 104 that generates pump light LP of a single wavelength and a nonlinear optical element (periodical polarization inversion element) 102. The nonlinear optical element has a periodic structure in which the polarization or the crystal orientation is periodically inverted with a certain inversion period Λ. When the pump light enters the nonlinear optical element, idler light LI and signal light LTHz are generated. The idler light and the signal light satisfy the law of conservation of energy for the pump light and a collinear phase matching condition for a virtual pump light wave vector k′p obtained by vector addition or subtraction of a grating vector kΛ which corresponds to the inversion period, to or from a pump light wave vector kp in the nonlinear optical element. The embodiment of the present invention also provides an optical parametric amplifier, a terahertz wave detector, and a nonlinear optical element.
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机译：为了通过简单的结构对太赫兹波进行高效的非线性光学波长转换，本发明的实施方式提供了一种具有泵浦光源 104的太赫兹波产生装置 100 。 产生单一波长的泵浦光LP和非线性光学元件（周期性偏振反转元件） 102 。非线性光学元件具有周期性结构，其中偏振或晶体取向以一定的反转周期Λ周期性地反转。当泵浦光进入非线性光学元件时，产生惰轮光LI和信号光L THz 。惰轮光和信号光满足泵浦光的能量守恒定律，并且满足通过光栅的矢量加法或减法获得的虚拟泵浦光波矢量k' p 的共线相位匹配条件与非线性光学元件中的泵浦光波向量k p 或来自其的反向周期对应的向量k Λ。本发明的实施例还提供了一种光学参量放大器，太赫兹波检测器和非线性光学元件。
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