Direct measurement of spectrally selective absorption enhancement in Fano resonance photonic crystal cavities on plastic substrates


Journal Article

We report direct measurement of spectrally selective absorption properties of PbSe and PbS colloidal quantum dots (CQDs) in Si nanomembrane photonic crystal cavities on flexible polyethylene terephthalate (PET) substrates. Enhanced optical absorption was obtained when CQD absorption overlaps with photonic crystal Fano resonances. On the other hand, no absorption was observed when the Fano resonance has no spectral overlap with the CQD absorption bands. The measurement results agree well with the simulation results obtained based on 3D FDTD and RCWA simulation techniques. Measured angular and polarization properties also agree well with Fano resonance transmission properties, which were obtained experimentally and, theoretically based on simulated dispersion properties and transmission properties. Bending induced spectral shifts were characterized for potentially flexible photonic device applications. © 2010 Copyright SPIE - The International Society for Optical Engineering.

Full Text

Duke Authors

Cited Authors

  • Chen, L; Yang, H; Qiang, Z; Sun, L; Ma, Z; Xu, J; Pate, R; Stiff-Roberts, A; Brown, GJ; Zhou, W

Published Date

  • May 7, 2010

Published In

Volume / Issue

  • 7609 /

International Standard Serial Number (ISSN)

  • 0277-786X

Digital Object Identifier (DOI)

  • 10.1117/12.841440

Citation Source

  • Scopus