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Efficient Photosensitization and High Optical Gain in a Novel Quantum‐Dot‐Sensitized Hybrid Photorefractive Nanocomposite at a Telecommunications Wavelength
Author(s) -
Roy Choudhury K.,
Sahoo Y.,
Jang S.,
Prasad P. N.
Publication year - 2005
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200400396
Subject(s) - photorefractive effect , materials science , nanocomposite , optoelectronics , wavelength , nanocrystal , photoconductivity , quantum dot , nanotechnology
A high‐performance hybrid polymeric photorefractive nanocomposite operating at the telecommunications wavelength of 1.34 μm is presented. The photorefractive nanocomposite is sensitized with PbS nanocrystals synthesized via a hot colloidal route. Photoconductivity experiments confirm and quantify the photocharge‐generation quantum efficiency of the nanocrystals. A pronounced two‐beam coupling effect at the operation wavelength is observed, leading to very high optical gains. Temporal evolution of the photorefractive growth process is also studied.