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Efficient terahertz sources by optical rectification in photonic crystals and metamaterials exploiting tailored transverse dispersion relations

  • US 7,421,171 B2
  • Filed: 06/19/2007
  • Issued: 09/02/2008
  • Est. Priority Date: 06/23/2006
  • Status: Expired due to Fees
First Claim
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1. A system for generating terahertz (THz) radiation comprising a photonic crystal structure including at least one nonlinear material that enables optical rectification, said photonic crystal structure being configured to have the proper transverse dispersion relations and density photonic states so as to allow THz radiation to be emitted efficiently when an optical or near infrared pulse travels through the nonlinear part of said photonic crystal structure, said photonic crystal is configured to have a frequency range (Δ

  • ω

    ) equal to 0.1% or more around some ω

    Thz, such that the number of photonic states in the Δ

    ω

    is >

    10 times larger or more than the number of photonic states the same frequency range would contain in the same, but unpatterned nonlinear material.

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