Low-Threshold Stimulated Emission Using Colloidal Quantum Wells
نویسندگان
چکیده
منابع مشابه
Low-threshold stimulated emission using colloidal quantum wells.
The use of colloidal semiconductor nanocrystals for optical amplification and lasing has been limited by the need for high input power densities. Here we show that colloidal nanoplatelets produce amplified spontaneous emission with thresholds as low as 6 μJ/cm(2) and gain as high as 600 cm(-1), both a significant improvement over colloidal nanocrystals; in addition, gain saturation occurs at pu...
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The terahertz (THz) radiation emitted from a double quantum well is investigated and optimized. Exploiting the phenomenon of quantum stochastic resonance (whereby the oscillation amplitude of a dissipative two-level system exhibits at low temperatures a non-monotonic response with respect to the parameters of a monochromatic external field or the strength of dissipation) to drive a series of id...
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Optically pumped stimulated emission (SE) from InGaN/GaN multiple quantum wells (MQWs) grown by metalorganic chemical vapor deposition has been systematically studied as a function of excitation length (Lexc). Two distinct SE peaks were observed from these structures: one that originates at 425 nm at 10 K (430 nm at 300 K) and another that originates at 434 nm at 10 K (438 nm at 300 K). The SE ...
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ژورنال
عنوان ژورنال: Nano Letters
سال: 2014
ISSN: 1530-6984,1530-6992
DOI: 10.1021/nl500775p