| NegativeGroupVelocityforWavesinaPlate |
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| 作者姓名： | 陈宇 |
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| 作者单位： | Chen Yu Department of Mordern Applied Physics，Tsinghua University，Beijing 100084 |
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| 摘 要： | ＮｅｇａｔｉｖｅＧｒｏｕｐＶｅｌｏｃｉｔｙｆｏｒＷａｖｅｓｉｎａＰｌａｔｅＣｈｅｎＹｕ（陈宇）ＤｅｐａｒｔｍｅｎｔｏｆＭｏｒｄｅｒｎＡｐｐｌｉｅｄＰｈｙｓｉｃｓ，ＴｓｉｎｇｈｕａＵｎｉｖｅｒｓｉｔｙ，Ｂｅｉｊｉｎｇ１０００８４Ａｂｓｔｒａｃｔ：Ａｐｒ...
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Negative Group Velocity for Waves in a Plate |
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| Chen Yu.NegativeGroupVelocityforWavesinaPlate[J].Tsinghua Science and Technology,1996(3). |
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| Authors: | Chen Yu |
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| Institution: | Chen Yu Department of Mordern Applied Physics,Tsinghua University,Beijing 100084 |
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| Abstract: | A proof is offered for the equivalence of the energy velocity and the group velocity in the case where the group velocity may be negative while the wavenumber is positive. The explicit expression for both the energy velocity and the group velocity is obtained for waves in an isotropic homogeneous plate waveguide. Calculations show the values of the group velocity or the energy velocity to be negative for some frequencies. |
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| Keywords: | energy velocity negative group velocity plate waveguide |
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