Modification of emission of CdTe nanocrystals by the local field of Langmuir-Blodgett colloidal photonic crystals

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Date
2008-11-26
Authors
Romanov, Sergei G.
Bardosova, Maria
Povey, Ian M.
Torres, C. M. Sotomayor
Pemble, Martyn E.
Gaponik, Nikolai
Eychmueller, Alexander
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AIP Publishing
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Abstract
A light source on the surface of a slab of 2+1-dimensional photonic crystal has been prepared by the Langmuir-Blodgett deposition of a colloidal crystal on top of a thin film containing CdTe nanocrystals. The directional enhancement of the light emission intensity in the spectral range of the photonic bandgap has been revealed through the comparative examination of the angle-resolved transmission, diffraction, and photoluminescence spectra of the prepared structures. Changes in the emission spectrum have been tentatively explained in terms of the acceleration of the radiative recombination due to the increase in the local field strength at photonic bandgap resonance and changes in the emission diagram-as arising from the wavelength dependence of the topology of the local field pattern.
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Keywords
cadmium compounds , colloidal crystals , electron-hole recombination , II-VI semiconductors , Langmuir-Blodgett films , light diffraction , light transmission , liquid phase deposition , nanostructured materials , photoluminescence , photonic band gap , photonic crystals , Photonic crystals , Photonic bandgap materials , Visible spectra , Emission spectra , Diffraction gratings
Citation
Romanov, S. G., Bardosova, M., Povey, I. M., Torres, C. M. S., Pemble, M. E., Gaponik, N. and Eychmüller, A. (2008) 'Modification of emission of CdTe nanocrystals by the local field of Langmuir–Blodgett colloidal photonic crystals', Journal of Applied Physics, 104(10), pp. 103118. doi: 10.1063/1.2981087
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© 2008 American Institute of Physics, This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Romanov, S. G., Bardosova, M., Povey, I. M., Torres, C. M. S., Pemble, M. E., Gaponik, N. and Eychmüller, A. (2008) 'Modification of emission of CdTe nanocrystals by the local field of Langmuir–Blodgett colloidal photonic crystals', Journal of Applied Physics, 104(10), pp. 103118 and may be found at http://aip.scitation.org/doi/abs/10.1063/1.2981087