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

Li Chen; Hongjun Yang; Zexuan Qiang; Lei Sun; Zhenqiang Ma; Jian Xu; Ryan Pate; Adrienne Stiff-Roberts; Gail J. Brown; Weidong Zhou

doi:10.1117/12.841440

23 February 2010 Direct measurement of spectrally selective absorption enhancement in Fano resonance photonic crystal cavities on plastic substrates

Li Chen, Hongjun Yang, Zexuan Qiang, Lei Sun, Zhenqiang Ma, Jian Xu, Ryan Pate, Adrienne Stiff-Roberts, Gail J. Brown, Weidong Zhou

Author Affiliations +

Proceedings Volume 7609, Photonic and Phononic Crystal Materials and Devices X; 76090E (2010) https://doi.org/10.1117/12.841440
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

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.

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Li Chen, Hongjun Yang, Zexuan Qiang, Lei Sun, Zhenqiang Ma, Jian Xu, Ryan Pate, Adrienne Stiff-Roberts, Gail J. Brown, and Weidong Zhou "Direct measurement of spectrally selective absorption enhancement in Fano resonance photonic crystal cavities on plastic substrates", Proc. SPIE 7609, Photonic and Phononic Crystal Materials and Devices X, 76090E (23 February 2010); https://doi.org/10.1117/12.841440

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