http://scholars.ntou.edu.tw/handle/123456789/2028
標題: | Nanoscale Core-Shell Hyperbolic Structures for Ultralow Threshold Laser Action: An Efficient Platform for the Enhancement of Optical Manipulation | 作者: | Lin, Hung-I Yadav, Kanchan Shen, Kun-Ching Haider, Golam Roy, Pradip Kumar Kataria, Monika Chang, Ting-Jia Li, Yao-Hsuan Lin, Tai-Yuan Chen, Yit-Tsong Chen, Yang-Fang |
關鍵字: | SPONTANEOUS EMISSION;VISIBLE WAVELENGTHS;PLASMON-POLARITONS;BROAD-BAND;NANOPARTICLES;METAMATERIALS;MOLECULES;CAVITIES;PHYSICS | 公開日期: | 9-一月-2019 | 出版社: | AMER CHEMICAL SOC | 卷: | 11 | 期: | 1 | 起(迄)頁: | 1163-1173 | 來源出版物: | ACS APPL MATER INTER | 摘要: | Plasmonic material has emerged with multifunctionalities for its remarkable tailoring light emission, reshaping density of states (DOS), and focusing subwavelength light. However, restricted by its propagation loss and narrowband resonance in nature, it is a challenge for plasmonic material to provide a broadband DOS to advance its application. Here, we develop a novel nanoscale core-shell hyperbolic structure that possesses a remarkable coupling effect inside the multishell nanoscale composite owing to a higher DOS and a longer time of collective oscillations of the electrons than the plasmonic-based pure-metal nanoparticles. Subsequently, a giant localized electromagnetic wave of surface plasmon resonance is formed at the surface, causing pronounced out-coupling effect. Specifically, the nanoscale core-shell hyperbolic structure confines the energy well without being decayed, reducing the propagation loss and then achieving an unprecedented stimulated emission (random lasing action by dye molecule) with a record ultralow threshold (similar to 30 mu J/cm(2)). Besides, owing to the radial symmetry of the nanoscale core-shell hyperbolic structure, the excitation of high wavevector modes and induced additional DOS are easily accessible. We believe that the nanoscale core-shell hyperbolic structure paves a way to enlarge the development of plasmonic-based applications, such as high optoelectronic conversion efficiency of solar cells, great power extraction of light-emitting diodes, wide spectra photodetectors, carrying the emitter inside the core part as quantitative fluorescence microscopy and bioluminescence imaging system for in vivo and in vitro research on human body. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/2028 | ISSN: | 1944-8244 | DOI: | 10.1021/acsami.8b13844 |
顯示於: | 光電與材料科技學系 07 AFFORDABLE & CLEAN ENERGY |
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