Volume 42 Issue 1
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Su An. Effect of lattice constants on transmission spectra of photonic crystal quantum well[J]. Infrared and Laser Engineering, 2013, 42(1): 200-205.
Citation: Su An. Effect of lattice constants on transmission spectra of photonic crystal quantum well[J]. Infrared and Laser Engineering, 2013, 42(1): 200-205.

Effect of lattice constants on transmission spectra of photonic crystal quantum well

  • Received Date: 2012-05-12
  • Rev Recd Date: 2012-06-11
  • Publish Date: 2013-01-25
  • To design high-quality optical devices, such as filters and switches, the effect of lattice constant on the transmission spectra of one-dimensional optical crystal quantum well(AB)5(CD)2(BA)5 was studied with transfer matrix method. The result shows that when the lattice constants of layer A and layer B separately increase with even times, the narrow transmission peaks at center frequency of band gap turns into wide transmission band, both sides of which are symmetrically distributed with two narrow transmission peaks of 100% transmittance; when lattice constants of layer A increases with odd times, a single transmission peak of 100% transmittance appears at the center frequency; when the lattice constants of layer B increases with odd times or that of layer D increases with integral multiple, three transmission peaks of 100% transmittance constantly turn up at the center frequency of band gap, and the three ones draw closer to the center of band gap as lattice constants of layer B and D are increasing; when lattice constant of layer D increases with integral multiple, three transmission peaks of 100% transmittance constantly present at the center frequency of band gap, besides, double-transmission-peak structure, which is closely related to the lattice constants,symmetrically appears on its two sides. Meanwhile, the transmittances of each double-transmission-peak enlarge with the integral multiple of lattice constants increasing. All these features can be applied to adjustable-channel optical filtering and switching, and can offer theoretical direction for experiment preparation.
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Effect of lattice constants on transmission spectra of photonic crystal quantum well

  • 1. Department of Physics and Electronic Engineering,Hechi University,Yizhou 546300,China

Abstract: To design high-quality optical devices, such as filters and switches, the effect of lattice constant on the transmission spectra of one-dimensional optical crystal quantum well(AB)5(CD)2(BA)5 was studied with transfer matrix method. The result shows that when the lattice constants of layer A and layer B separately increase with even times, the narrow transmission peaks at center frequency of band gap turns into wide transmission band, both sides of which are symmetrically distributed with two narrow transmission peaks of 100% transmittance; when lattice constants of layer A increases with odd times, a single transmission peak of 100% transmittance appears at the center frequency; when the lattice constants of layer B increases with odd times or that of layer D increases with integral multiple, three transmission peaks of 100% transmittance constantly turn up at the center frequency of band gap, and the three ones draw closer to the center of band gap as lattice constants of layer B and D are increasing; when lattice constant of layer D increases with integral multiple, three transmission peaks of 100% transmittance constantly present at the center frequency of band gap, besides, double-transmission-peak structure, which is closely related to the lattice constants,symmetrically appears on its two sides. Meanwhile, the transmittances of each double-transmission-peak enlarge with the integral multiple of lattice constants increasing. All these features can be applied to adjustable-channel optical filtering and switching, and can offer theoretical direction for experiment preparation.

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