Nanoscale Control of Temperature Distribution Using a Plasmonic Trimer
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A plasmonic trimer composed of three closely packed identical gold nanospheres for manipulating nanoscale temperature distribution is proposed. It is shown that heat can be unevenly distributed among the three particles, creating a high temperature gradient in the nanoscale space despite the strong thermalization effect. Moreover, the difference in temperature increment among the particles is sensitive to the polarization of incident light and can be continuously tuned. The dependence of the achievable temperature difference on the trimer parameters is also investigated. The ability of nanoscale selective heating provides a possible way of remotely manipulating the nanoscale thermally induced physical or chemical processes with unprecedented spatial precision.
KeywordsPlasmonic trimer Photothermal effect Temperature distribution
This work is supported by the National Natural Science Foundation of China (Grant Nos. 61275030, 61205030, 61235007, and 61425023), Qianjiang River Fellow Fund of Zhejiang Province, the Scientific Research Foundation for the Returned Overseas Chinese Scholars from the State Education Ministry, the Opened Fund of State Key Laboratory of Advanced Optical Communication Systems and Networks, Doctoral Fund of Ministry of Education of China (Grant No. 20120101120128), Zhejiang University K.P. Chao’s High Technology Development Foundation, the Swedish Research Council (VR), and VR’s Linnaeus center in Advanced Optics and Photonics (ADOPT).
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