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Abstract
Nanotechnology translates physics into function; it transforms the
promising discoveries of nanoscience into advances in nanoengineering. For
example colloidal quantum dots (QDs) due to their unique optical properties,
such as strong size dependent emission wavelength, has enabled quantum dotsbased
light emitting devices which can be designed to cover the entire nearinfrared
spectrum based on a single material and fabrication process.
Our interest in infrared light-emitting quantum dots came from their
applications which span a broad range of human activities, and especially their
prospective applications in telecommunications. Optical fiber has traditionally
exhibited low-loss transmission windows in the vicinity of 1.3 m and 1.55
m. Other applications for which infrared active quantum dots have been
proposed to date include: infrared luminescence light emitting devices, infrared
detectors, modulators in the extended telecommunications-wavelength band
(1.2–1.7 m), photovoltaic, infrared laser technologies, thermoelectrics
devices, and biomedical applications.