Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/52001
Title: INVESTIGATION OF OPTICAL GAIN IN COLLOIDAL HETEROSTRUCTURED SEMICONDUCTOR NANOCRYSTALS
Authors: LIAO YILE
Keywords: Optical Gain, Heterostructured Semiconductor Nanocrystals, Nanorods, Nanotetrapods, Alloyed Nanocrystals, Lasing Medium
Issue Date: 22-Aug-2013
Citation: LIAO YILE (2013-08-22). INVESTIGATION OF OPTICAL GAIN IN COLLOIDAL HETEROSTRUCTURED SEMICONDUCTOR NANOCRYSTALS. ScholarBank@NUS Repository.
Abstract: Due to quantum confinement effect, in semiconductor nanocrystals (NCs) the spacing between the electronic states is much greater than the thermal energy, preventing thermal depopulation of the first few excited states. This should result in a lasing threshold independent of operating temperature, thus circumventing one of the major drawbacks of conventional bulk semiconductor lasers. Along with solution processability, emission wavelength tunability and flexible surface chemistry, there have been numerous efforts to try to achieve stimulated emission in wet-chemically synthesized semiconductor NCs and develop them into lasers. This thesis summarizes our present understanding of the lasing properties of semiconductor NCs in different structure and component based on sol-gel fabricated matrix.
URI: http://scholarbank.nus.edu.sg/handle/10635/52001
Appears in Collections:Ph.D Theses (Open)

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