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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 1,
  • Issue 5,
  • pp. 308-310
  • (2003)

Terahertz generation from Si_(3)N_(4) covered photoconductive dipole antenna

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Abstract

We observe enhanced terahertz (THz) radiation generated from a Si_(3)N_(4) film-coated GaAs photoconductive dipole antenna. Compared to an uncoated antenna with identical electrode geometry and optical excitation power, the Si_(3)N_(4) film-coated antenna has a higher effective DC resistance and larger breakdown voltage. As a result, the peak amplitude of generated THz radiation is significantly enhanced due to the Si_(3)N_(4) film-coated layer.

© 2005 Chinese Optics Letters

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