| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Two Schemes for Generating Efficient Terahertz Waves in Nonlinear Optical Crystals with a Mid-Infrared CO2 Laser |
| RAO Zhi-Ming1,2, WANG Xin-Bing1**, LU Yan-Zhao1, ZUO Du-Luo1, WU Tao1
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1 Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074
2 Department of Computer Science, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004
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RAO Zhi-Ming, WANG Xin-Bing, LU Yan-Zhao et al 2011 Chin. Phys. Lett. 28 074215 |
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Abstract Terahertz wave generation is explored on the basis of difference frequency generation in nonlinear optical crystals with a mid-infrared CO2 laser. The phase−matching angle and the grating period of periodically inverted GaAs in the 100–1000 µm (0.3–3 THz) range are also investigated on the basis of the surface-emitted difference frequency generation. It is found that two schemes of phase-matching-applied collinear phase matching and phase-matching-applied non-collinear phase matching are efficient to obtain THz waves.
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| Keywords:
42.65.Ky
42.79.Nv
42.55.Lt
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Received: 18 April 2011
Published: 29 June 2011
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| PACS: |
42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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42.79.Nv
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(Optical frequency converters)
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42.55.Lt
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(Gas lasers including excimer and metal-vapor lasers)
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