Enhanced infrared emission from colloidal HgTe nanocrystal quantum dots on silicon-on-insulator photonic crystals

A two dimensional silicon-on-insulator based photonic crystal structure is used to enhance the emission from colloidal HgTe nanocrystal quantum dots embedded in a thin polymer film. The enhancement is resonant to the leaky eigenmodes of the photonic crystals due to coherent scattering effects. Transmittance and photoluminescence experiments are presented to map the leaky mode dispersion and the angle dependence of the emission enhancement factor, which reaches values up to 80 (650) for vertical (oblique) emission in the telecommunication wavelength range.

Austrian Academic Exchange Service (OAD) CN08/2007 National Basic Research Program 2007CB924903 2007CB924904 2009CB320300 National Natural Science Foundation 60736037 6053701060807010Austrian Science Fund FWF SFB IR_ON START Y179 One of the authors (C.X.W.) acknowledges the support from the Austrian Academic Exchange Service (OAD) (Grant No. CN08/2007). Financial supports from the National Basic Research Program (Grant Nos. 2007CB924903 2007CB924904 and 2009CB320300) and the National Natural Science Foundation both from China (Grant Nos. 60736037 60537010 and 60807010) and from the Austrian Science Fund FWF (projects SFB IR_ON and START Y179) are gratefully acknowledged.