THz Generation From GaP Rod-Type Waveguides
THz Generation From GaP Rod-Type Waveguides
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DOI：
10.1109/lpt.2006.890098
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发表时间：
2007-03
影响因子：
2.6
通讯作者：
著者 Tanabe;Nishizawa Tadao;Jun-Ichi Suto;Ken Saito;K. Kyosuke;Oyama Tomoyuki;Yutaka;Jun-Ichi Nis
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文献类型：
--
作者：
著者 Tanabe;Nishizawa Tadao;Jun-Ichi Suto;Ken Saito;K. Kyosuke;Oyama Tomoyuki;Yutaka;Jun-Ichi Nis
利用共线相位匹配条件，研究了GaP棒型波导中近红外光的差频混频产生太赫兹波的特性。观察到太赫兹输出峰，并出现在对应于基本和高阶波导模式的频率。有趣的是，对于较小的波导横截面，基模的位置向更高的频率偏移，这归因于太赫兹波的波导限制。与GaP晶体相比，在截面为200 μ m × 160 μ m的波导中，转换效率得到了提高
Terahertz (THz) generation was demonstrated from GaP rod-type waveguides via difference-frequency-mixing of near-infrared light using a collinear phase-matching condition. THz output peaks were observed, and appeared at frequencies corresponding to the fundamental and high-order waveguide modes. Interestingly, the position of the fundamental mode shifted to a higher frequency for a smaller waveguide cross-section, which is attributed to the waveguide confinement of the THz wave. The conversion efficiency was enhanced in the waveguide with a cross section of 200 mumtimes160 mum as compared to that in bulk GaP crystals