A light source on the surface of a slab of -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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15 November 2008
Research Article|
November 26 2008
Modification of emission of CdTe nanocrystals by the local field of Langmuir–Blodgett colloidal photonic crystals
Sergei G. Romanov;
Sergei G. Romanov
a)
1
Ioffe Physical Technical Institute
, Polytekhnicheskaya st., 26 194021, St. Petersburg, Russia
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Maria Bardosova;
Maria Bardosova
2Tyndall National Institute,
University College Cork
, Prospect Row, Cork, Ireland
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Ian M. Povey;
Ian M. Povey
2Tyndall National Institute,
University College Cork
, Prospect Row, Cork, Ireland
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C. M. Sotomayor Torres;
C. M. Sotomayor Torres
2Tyndall National Institute,
University College Cork
, Prospect Row, Cork, Ireland
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Martyn E. Pemble;
Martyn E. Pemble
2Tyndall National Institute,
University College Cork
, Prospect Row, Cork, Ireland
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Nikolai Gaponik;
Nikolai Gaponik
3Institute of Physical Chemistry and Electrochemistry,
Technical University of Dresden
, Bergstr. 66b, Dresden 01062, Germany
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Alexander Eychmüller
Alexander Eychmüller
3Institute of Physical Chemistry and Electrochemistry,
Technical University of Dresden
, Bergstr. 66b, Dresden 01062, Germany
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a)
Author to whom correspondence should be addressed. Electronic mail: sergei.romanov@tyndall.ie.
J. Appl. Phys. 104, 103118 (2008)
Article history
Received:
April 16 2008
Accepted:
July 23 2008
Citation
Sergei G. Romanov, Maria Bardosova, Ian M. Povey, C. M. Sotomayor Torres, Martyn E. Pemble, Nikolai Gaponik, Alexander Eychmüller; Modification of emission of CdTe nanocrystals by the local field of Langmuir–Blodgett colloidal photonic crystals. J. Appl. Phys. 15 November 2008; 104 (10): 103118. https://doi.org/10.1063/1.2981087
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