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首页> 外文会议>Nonlinear Materials, Devices, and Applications >Terahertz wave source via difference-frequency mixing using cross-Reststrahlen band dispersion compensation phase matching: a material study
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Terahertz wave source via difference-frequency mixing using cross-Reststrahlen band dispersion compensation phase matching: a material study

机译：太赫兹波源通过跨-Reststrahlen带色散补偿相位匹配的差频混合：材料研究

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摘要

Abstract: A novel phase-matching technique for coherent THz-wave generation was proposed. This approach uses cross- Reststrahlen band dispersion compensation phase-matching in a collinear optical mixing technique using isotropic, semiconductor nonlinear crystals. The pump and signal sources are in the near-IR transmission window of the nonlinear crystal and the generated idler wave is in the far-IR transmission window, on the other side of the crystal's Reststrahlen band. The choice of the nonlinear crystal for frequency conversion from the near-IR to the far-IR is highly dependent on the optical properties of the nonlinear crystal being used as the frequency converter element. We evaluate the use of the proposed phase-matching technique with a variety of III-V and II-VI compounds taking into account their optical dispersion and their phase- matching properties. Theoretical projections of the device performance such as perfect phase-matching conditions, coherence length and wavelength tuning range for different nonlinear crystals are compared. !10
机译：摘要：提出了一种新的相位匹配技术，用于相干太赫兹波的产生。该方法在使用各向同性，半导体非线性晶体的共线光学混合技术中，使用了跨Reststrahlen带色散补偿相位匹配。泵浦和信号源在非线性晶体的近红外传输窗口中，而所产生的惰波在晶体的Reststrahlen带的另一侧的远红外传输窗口中。从近红外到远红外进行频率转换的非线性晶体的选择高度依赖于用作变频器元件的非线性晶体的光学特性。考虑到它们的光学色散和相位匹配特性，我们评估了提议的相位匹配技术与各种III-V和II-VI化合物的配合使用。比较了器件性能的理论投影，例如针对不同非线性晶体的完美相位匹配条件，相干长度和波长调谐范围。 ！10

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