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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 26,
  • Issue 11,
  • pp. 1519-1523
  • (2008)

Enhanced Terahertz Emission From ZnSe Nano-Grain Surface

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Abstract

ZnSe(111) nano-grain surface is fabricated by the femtosecond laser ablation technology and is applied for terahertz (THz) generation. Compared with bare ZnSe surface, this nano-grain surface can improve THz emission properties. The power of THz radiation from ZnSe nano-grain surface is about twice as large as that from bare surface at optical rectification range. This enhancement can be attributed to the local field enhancement of the ZnSe nano-grain surface. The primary field enhancement mechanism is the macroscopic local-field enhancement which includes both of the lightning-rod effect and the local-plasmon effect.

© 2008 IEEE

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