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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41330

Title: Biologically inspired band-edge laser action from semiconductor with dipole-forbidden band-gap transition
Authors: Cih-Su Wang;Chi-Shung Liau;Tzu-Ming Sun;Yu-Chia Chen;Tai-Yuan Lin;Yang-Fang Chen
Contributors: 國立臺灣海洋大學:光電科學研究所
Date: 2015
Issue Date: 2017-02-14T06:46:31Z
Publisher: Science Report
Abstract: Abstract: A new approach is proposed to light up band-edge stimulated emission arising from a semiconductor with dipole-forbidden band-gap transition. To illustrate our working principle, here we demonstrate the feasibility on the composite of SnO2 nanowires (NWs) and chicken albumen. SnO2 NWs, which merely emit visible defect emission, are observed to generate a strong ultraviolet fluorescence centered at 387 nm assisted by chicken albumen at room temperature. In addition, a stunning laser action is further discovered in the albumen/SnO2 NWs composite system. The underlying mechanism is interpreted in terms of the fluorescence resonance energy transfer (FRET) from the chicken albumen protein to SnO2 NWs. More importantly, the giant oscillator strength of shallow defect states, which is served orders of magnitude larger than that of the free exciton, plays a decisive role. Our approach therefore shows that bio-materials exhibit a great potential in applications for novel light emitters, which may open up a new avenue for the development of bio-inspired optoelectronic devices.
Relation: 5
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41330
Appears in Collections:[光電科學研究所] 期刊論文

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