Nanoradiator-Mediated Deterministic Opto-Thermoelectric Manipulation.
Nanoradiator-Mediated Deterministic Opto-Thermoelectric Manipulation.
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DOI:
10.1021/acsnano.8b05824
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发表时间:
2018-10-23
期刊:
影响因子:
17.1
通讯作者:
Zheng Y
中科院分区:
文献类型:
--
作者:
Liu Y;Lin L;Bangalore Rajeeva B;Jarrett JW;Li X;Peng X;Kollipara P;Yao K;Akinwande D;Dunn AK;Zheng Y
Optical manipulation of colloidal nanoparticles and molecules is significant in numerous fields. Opto-thermoelectric nanotweezers exploiting multiple coupling among light, heat, and electric fields enables the low-power optical trapping of nanoparticles on a plasmonic substrate. However, the management of light-to-heat conversion for the versatile and precise manipulation of nanoparticles is still elusive. Herein, we explore the opto-thermoelectric trapping at plasmonic antennas that serve as optothermal nanoradiators to achieve the low-power (~0.08 mW/μm2) and deterministic manipulation of nanoparticles. Specifically, precise optical manipulation of nanoparticles is achieved via optical control of the subwavelength thermal hot spots. We employ a femtosecond laser beam to further improve the heat localization and the precise trapping of single ~30 nm semiconductor quantum dots at the antennas where the plasmon–exciton coupling can be tuned. With its low-power, precise, and versatile particle control, the opto-thermoelectric manipulation can have applications in photonics, life sciences, and colloidal sciences.
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