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Interplay between optical gain and photoinduced absorption in CdSe nanocrystals

Article Abstract:

An ultrafast transient absorption technique is used to study the competition between optical gain and photoinduced absorption (PA) in CdSe nanocrystals (NCs) as a function of NC size, surface passivation, and solvent/matrix identity. Observations of strong PA size dependence, as well as its dependence on the surface cap and the solvent/matrix identity, indicate that PA is not intrinsic to NCs but is rather the property of the NC interface.

Nanotechnology, Photons

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Solvothermal synthesis of monodisperse PbSe nanocrystals

Article Abstract:

Size-controllable monodisperse PbSe and PbSe/PbS nanocrystals (NCs) are successfully synthesized with a solvothermal method. These narrow-band-gap semiconductor NCs with tunable size are expected to have potential applications in near- and mid-IR telecommunication laser sources, electroluminescence, and solar cell materials.

Lead compounds

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Tunable near-infrared optical gain and amplified spontaneous emission using PbSe nanocrystals

Article Abstract:

The fundamental physics of light amplification in PbSe nanocrystals (NCs) with emission energies in the near-infrared (IR) is analyzed. The findings indicate the feasibility of NC-based amplifiers and lasers tunable in the near-IR range and, in particular, in the range of telecommunication windows.

Lead, Chemistry, Physical and theoretical, Physical chemistry, Light emission

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