Biologically inspired band-edge laser action from semiconductor with dipole-forbidden band-gap transition

Scientific Reports
Cih-Su WangYang-Fang Chen

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.

References

Jun 9, 2001·Science·M H HuangP Yang
Mar 6, 2003·Nature Materials·Justin C JohnsonRichard J Saykally
May 29, 2003·Biophysical Journal·Claude Berney, Gaudenz Danuser
May 10, 2011·Nanoscale·Daniël Vanmaekelbergh, Lambert K van Vugt
Aug 3, 2011·Advanced Materials·Jer-Wei ChangTen-Chin Wen
Dec 28, 2009·Advanced Materials·Ping-Hung YehZhong Lin Wang

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Citations

Jul 21, 2015·Optics Express·Yu-Chia ChenYang-Fang Chen
Sep 11, 2020·Soft Matter·Hanh Hong MaiVan Duong Ta

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Methods Mentioned

BETA
fluorescence
FRET
AFM
fluorescence resonance
atomic force microscopy
X-ray

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