Opening of hybrid bandgaps in two-dimensional photonic crystals of Pb(Mg1/3Nb1/3)O3-PbTiO3 having very low refractive index contrast

Ratnanjali Khandwal, Xiaoyuan Qi, Sang Yeob Sung, Bethanie J.H. Stadler, Yingyin Kevin Zou

Research output: Contribution to journalArticle


The effect of anisotropy on two-dimensional photonic crystals of hexagonally arranged Pb(Mg1/3Nb1/3)O3 -PbTiO3 (PMNT) rods in air background was analyzed using a finite- difference time-domain method. The refractive index contrast between PMNT (n = 2.47) and air is low compared to conventional semiconductor-air photonic crystals. Yet, hybrid (polarization-independent) photonic bandgaps were achieved for anisotropic PMNT rods by adjusting the structural parameters and the anisotropy. The maximum bandwidth found was 20 nm. It was possible to engineer the center wavelength of this bandgap to 980, 1300, and 1550 nm, for potential applications as switches, electrooptic filters, and modulators in this region.

Original languageEnglish (US)
Pages (from-to)673-675
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number9
StatePublished - May 1 2008


  • Electrooptic (EO) effects
  • Electrooptic (EO) modulation
  • Optical couplers
  • Optical switches
  • Photonic switching systems
  • Polarization

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