Methods and systems for introducing electromagnetic radiation into photonic crystals

  • US 5,999,308 A
  • Filed: 04/01/1998
  • Issued: 12/07/1999
  • Est. Priority Date: 04/01/1998
  • Status: Expired due to Term
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First Claim
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1. A method for inducing electromagnetic radiation in a photonic crystal having a periodic variation in dielectric constant sufficient to produce a photonic bandgap for at least one propagation direction and at least one polarization direction, the photonic bandgap defining a frequency range for which electromagnetic radiation at a frequency within the frequency range and having a polarization direction among the at least one polarization direction cannot propagate along the at least one propagation direction, and the photonic crystal having at least one defect in the periodic variation sufficient to support a localized mode of electromagnetic radiation at a frequency within the frequency range of the photonic bandgap, the method comprising the steps of:

  • delivering electromagnetic radiation having a frequency outside the frequency range of the photonic bandgap to the defect; and

    generating electromagnetic radiation having a frequency within the frequency range of the photonic bandgap at the defect in response to the delivered electromagnetic radiation.

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