Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 16, Issue 18, Pages 8168-8177Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp55334e
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In bulk materials, defects are usually considered to be unwanted since deviations from perfect lattices may degrade device performance. Interestingly, the presence of defects throws open new possibilities in the case of nanostructures due to the properties related to their limited size scale. Defects and disorders which alter the electronic structure of nanostructures can significantly influence their electronic, magnetic and nonlinear optical properties. Here, we show that defect engineering is an effective strategy for tailoring the nonlinear optical (NLO) properties of carbon and ZnO nanostructures. The effects of surface states, lattice disorders, polycrystalline interfaces and heterogeneous dopants on the nonlinear absorption behaviour of these nanostructures are discussed in detail. Realistic tunable NLO features achieved by controlling such defects enhance the scope of these nanostructures in device applications such as optical limiting, optical switching, pulse shaping, pulse compression and optical diode action.
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