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

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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

Bibliographical note

Funding Information:
Manuscript received November 21, 2007; revised January 25, 2008. This work was supported in part by the National Science Foundation (NSF) under award DMI-0522177. R. Khandwal, X. Qi, S.-Y. Sung, and B. J. H. Stadler are with the Department of Electrical and Computer Engineering, University of Minnesota, Twin Cities, Minneapolis, MN 55455 USA (e-mail: Y. K. Zou is with Boston Applied Technologies, Incorporated, Woburn, MA 01801 USA. Color versions of one or more of the figures in this letter are available online at Digital Object Identifier 10.1109/LPT.2008.919593


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


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