Enhanced photorefractivity in a polymeranocrystal composite photorefractive device at telecommunication wavelength

摘要

Enhanced photorefractive u0002PRu0003 response in nanocrystal-polymer nanocomposite PR devices at thentelecommunication wavelength of 1.3 u0002m is achieved using facile surface treatment of PbSnnanocrystals functionalized with thermally cleavable ligands. The cleavage of the ligands, by heatntreatment, results in significant improvement in both photocharge generation and PR response, asndemonstrated by photoconductivity and two-beam coupling u0002TBCu0003 experiments, respectively. ThenTBC experiment shows that the optical gain coefficient is improved drastically u0002about 63%u0003 at annapplied electric field of 84 V/u0002m. © 2010 American Institute of Physics. u0004doi:10.1063/1.3531650