Terahertz Radiation from a (113)B GaAs/AlAs Coupled Multilayer Cavity Generated by Ultrashort Laser Pulse Excitation
Terahertz Radiation from a (113)B GaAs/AlAs Coupled Multilayer Cavity Generated by Ultrashort Laser Pulse Excitation
复制标题
超短激光脉冲激发产生的 (113)B GaAs/AlAs 耦合多层腔的太赫兹辐射
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
T. Isu
中科院分区：
文献类型：
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作者：
S. Katoh;T. Takimoto;Y. Nakagawa;K. Morita;T. Kitada;T. Isu
利用生长在（113）B GaAs衬底上的GaAs/AlAs耦合多层腔实现了太赫兹（THz）辐射。利用超短脉冲激光同时激发高反射带内的两个腔模，实现差频产生。在时间分辨THz测量的时间波形中清楚地观察到周期为0.3 ps的振荡。振荡周期与两个腔模之间的差频（3.3THz）很好地吻合。测量了激发光脉冲偏振方向对太赫兹波波形的影响，得到的各向异性信号幅度与计算的（113）B GaAs衬底二阶非线性偏振各向异性一致。
Terahertz (THz) radiation was demonstrated using a GaAs/AlAs coupled multilayer cavity grown on a (113)B GaAs substrate. Two cavity modes realized in the high-reflection band were simultaneously excited using ultrashort laser pulses for the difference frequency generation (DFG). Oscillations with a period of 0.3 ps were clearly observed in the temporal waveforms of time-resolved THz measurements. The oscillation period well agreed with the difference frequency between the two cavity modes (3.3 THz). We also measured the THz waveforms depending on the polarization direction of the excitation laser pulses, and the anisotropic signal amplitudes also agreed with the calculated anisotropy of the second-order nonlinear polarization on the (113)B GaAs substrate.
影响因子：
3.8
作者：
Belkin, Mikhail A.;Fan, Jonathan A.;Linfield, Edmund H.
通讯作者：
Linfield, Edmund H.