標題: Photoluminescence-Driven Broadband Transmitting Directional Optical Nanoantennas
作者: See, Kel-Meng
Lin, Fan-Cheng
Chen, Tzu-Yu
Huang, You-Xin
Huang, Chen-Hsien
Yesilyurt, A. T. Mina
Huang, Jer-Shing
電子物理學系
Department of Electrophysics
關鍵字: Nanoantennas;Yagi-Uda nanoantennas;surface plasmon resonance;photoluminescence;directional emission;log-periodic nanoantenna
公開日期: 1-Sep-2018
摘要: Optical nanoantennas mediate near and far optical fields. Operating a directional nanoantenna in transmitting mode is challenging because the antenna needs to be driven by a nanosized optical frequency generator, which must work at the antenna's resonance frequency and be precisely attached to the antenna's feed with correct polarization. Quantum emitters have been used as optical nanogenerators, but their precise positioning relative to the nanoantenna is technically challenging, setting up a barrier to the practical implementation. One unique source to drive nanoantenna is the photoluminescence from the material of the nanoantenna because the high operational frequency of the antenna reaches the regime for the electronic transitions in matter. Here, we exploit plasmon-modulated photoluminescence (PMPL) as an effective optical source to drive directional nanoantennas. We experimentally realize two technically challenging theoretical proposals, namely, an optical nanospectrometer based on Yagi-Uda nanoantennas and tunable broadband directional emission from log-periodic nanoantennas. Using photoluminescence from the nanoantenna as an optical source promotes practical implementation of transmitting optical nanoantennas.
URI: http://dx.doi.org/10.1021/acs.nanolett.8b02836
http://hdl.handle.net/11536/148158
ISSN: 1530-6984
DOI: 10.1021/acs.nanolett.8b02836
期刊: NANO LETTERS
Volume: 18
起始頁: 6002
結束頁: 6008
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