Theoretical analysis of Z-scan measurement in photonic bandgap structure

Jisoo Hwang, J. W. Wu

Research output: Contribution to journalArticlepeer-review


We studied Z-scan measurement to utilize it as a technique determining third order nonlinear optical coefficients in the photonic bandgap structure. The property of bandgap structured material, loss of transmittance by Bragg reflection, converts the phase change to intensity change or vice versa. It shows up as a result of exchange between closed- and open- aperture in Z-scan measurement near bandgap region. Through the numerical simulation based on the investigation of dispersion relation, it is obtained that the results of Z-scan measurement with closed- and open- aperture vary according to the frequency region.

Original languageEnglish
Pages (from-to)49-52
Number of pages4
JournalNonlinear Optics Quantum Optics
Issue number1-4 SPEC. ISS.
StatePublished - 2005


  • Bragg reflection
  • Dispersion relation
  • Forbidden band
  • Optical Kerr nonlinearity
  • Photonic bandgap
  • Photonic crystal
  • Third order nonlinear optical coefficient
  • Z-scan measurement


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