金纳米双球系统的高灵敏光学传感与其消光系数及局域场增强之关联

夏文飞; 陈剑锋; 龙利; 李志远

doi:10.7498/aps.70.20210231

摘要

系统地研究了最基本的单/双金纳米球系统的共振峰移动、局域场增强和消光谱等光学响应行为. 发现在双金纳米球系统中, 入射光除了能激发每个金纳米球的局域表面等离激元共振模式外, 调整金纳米球间隙可使共振模式间产生强烈耦合, 使系统局域场增强因子进一步提升, 并增强光学传感能力和消光系数. 有趣的是, 受限于有限的局域场增强体积, 具有高局域场增强因子的间隙为2 nm的双金纳米球系统的消光系数大幅降低, 其消光系数和光学传感能力均低于5 nm间隙的系统. 研究表明, 双金纳米球系统的光学传感灵敏度不是由局域场增强幅度直接决定的, 而与系统消光系数有相似的变化行为. 这些结果可指导金纳米双颗粒和多颗粒系统的设计, 为表面拉曼散射增强和光学传感等方面的应用提供创新性思路和方案.

关键词:

Abstract

In this paper we systematically study the optical extinction, local field enhancement, and resonance peak shift of basic single/double gold nanosphere system. We find that in the double gold nanosphere system, the incident light can excite the coupled resonance modes when the two gold nanospheres are approaching to each other, leading the local field to be enhanced greatly. Interestingly, limited by the scant volume of local field, the extinction coefficient of the double gold nanosphere system of 2 nm gap with a high local field enhancement factor is greatly reduced, so that its optical sensing sensitivity and extinction coefficient are smaller than the 5 nm gap system’s. Studies show that the optical sensing sensitivity of the double gold nanosphere system is not directly determined by the local field enhancement amplitude, but has a similar change behavior to the extinction coefficient of the system. These results can offer us a useful route and hint for designing the gold nanoparticle systems used in the surface Raman scattering enhancement and high performance optical sensing.

Keywords:

作者及机构信息

华南理工大学物理与光电学院, 广州　510641

通信作者: 李志远, phzyli@scut.edu.cn

基金项目: 国家重点研发计划(批准号: 2018YFA0306200)、国家自然科学基金(批准号: 11974119)、中央高校基本科研业务费(批准号: 2019ZD50)、广东引进创新创业研究团队计划(批准号: 2016ZT06C594)、广东重点研发项目(批准号: 2020B010190001)和东莞领军人才计划资助的课题

Authors and contacts

School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641, China

Corresponding author: Li Zhi-Yuan, phzyli@scut.edu.cn

Funds: Project supported by the National Key R&D Program of China (Grant No. 2018YFA0306200), the National Natural Science Foundation of China (Grant No. 11974119), the Fundamental Research Fund for the Central Universities, China (Grant No. 2019ZD50), the Innovative and Entrepreneurial Research Team Program of Guangdong Province, China (Grant No. 2016ZT06C594), the Research and Development Projects in Key Areas of Guangdong Province, China (Grant No. 2020B010190001), and the Dongguan Introduction Program of Leading Innovative and Entrepreneurial Talents, China.

文章全文 : translate this paragraph

参考文献

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施引文献

图 1 单/双金纳米球系统结构示意图和入射光波矢及其偏振方向　(a)单金纳米球; (b)双金纳米球

Fig. 1. Schematic diagram of the structure of the single/ double metal nanosphere system and the incident light wave vector and its polarization direction: (a) Single gold nanosphere; (b) double gold nanosphere.

下载: 全尺寸图片幻灯片

图 2 单金纳米球系统的消光谱、共振波长和电场分布　(a)不同背景折射率下的消光谱; (b)共振波长与背景折射率的关系; (c) n = 1.0时电场分布; (d) n = 1.3时电场分布

Fig. 2. Extinction spectrum, resonance wavelength and electric field distribution of the single metal nanosphere system: (a) Extinction spectrum for different n; (b) relation between resonance wavelength and n; (c) electric field for n = 1.0; (d) electric field for n = 1.3.

下载: 全尺寸图片幻灯片

图 3 不同间距双金纳米球系统在不同背景折射率下的消光谱　(a) w = 2 nm; (b) w = 5 nm; (c) w = 10 nm; (d) w = 20 nm

Fig. 3. Extinction spectrum of the bimetallic nanosphere system with different spacing under different n: (a) w = 2 nm; (b) w = 5 nm; (c) w = 10 nm; (d) w = 20 nm.

下载: 全尺寸图片幻灯片

图 4 空气中双金纳米球系统在共振频率处的近场分布　(a) w = 2 nm (λ_p = 616 nm); (b) w = 5 nm (λ_p = 634 nm); (c) w =10 nm (λ_p = 594 nm); (d) w = 20 nm (λ_p = 571 nm)

Fig. 4. Near-field distribution of the bimetallic nanosphere system in the air at the resonance frequency: (a) w = 2 nm (λ_p = 616 nm); (b) w = 5 nm (λ_p = 634 nm); (c) w = 10 nm (λ_p = 594 nm); (d) w = 20 nm (λ_p = 571 nm).

下载: 全尺寸图片幻灯片

图 5 不同间隙的双金纳米球系统　(a) LSPR共振波长λ_p与背景折射率n的关系; (b)消光谱; (c)共振峰处的最大场增强因子γ; (d)共振峰处的消光系数

Fig. 5. Bimetallic gold nanosphere system with different w: (a) Relationship between λ_p and background index n; (b) extinction spectrum; (c) maximum field enhancement for resonance peak; (d) extinction for resonance peak.

下载: 全尺寸图片幻灯片

[1]	虞华康, 刘伯东, 吴婉玲, 李志远 2019 物理学报 68 149101 Google Scholar Yu H K, Liu B D, Wu W L, Li Z Y 2019 Acta Phys. Sin. 68 149101 Google Scholar
[2]	Yu H K, Peng Y S, Yang Y, Li Z Y 2019 npj Comput. Mater. 5 45 Google Scholar
[3]	Hao E, Schatz G C 2004 J. Chem. Phys. 120 357 Google Scholar
[4]	Zhou F, Li Z Y, Liu Y, Xia Y N 2008 J. Phys. Chem. C 112 20233 Google Scholar
[5]	Liu S Y, Huang L, Li J F, Wang C, Li Q, Xu H X, Guo H L, Meng Z M, Shi Z, Li Z Y 2013 J. Phys. Chem. C 117 10636 Google Scholar
[6]	Kneipp K, Wang Y, Kneipp H, Perelman L T, Itzkan I, Dasari R R, Feld M S 1997 Phys. Rev. Lett. 78 1667 Google Scholar
[7]	Nie S, Emory S R 1997 Science 275 1102 Google Scholar
[8]	Xu H, Bjerneld E J, Käll M, Börjesson L 1999 Phys. Rev. Lett. 83 4357 Google Scholar
[9]	Hsieh Y H, Hsu B W, Peng K N, Lee K W, Chu C W, Chang S W, Lin H W, Yen T J, Lu Y J 2020 ACS Nano 14 11670 Google Scholar
[10]	Park S M, Lee K S, Kim J H, Yeon G J, Shin H H, Park S, Kim Z H 2020 J. Phys. Chem. Lett. 11 9313 Google Scholar
[11]	Luo Y, Wang Y C, Liu M Q, Zhu H, Chen O, Zou S L, Zhao J 2020 J. Phys. Chem. Lett. 11 2449 Google Scholar
[12]	Rastogi R, Arianfard H, Moss D, Juodkazis S, Adam P M, Krishnamoorthy S 2021 ACS Appl. Mater. Interfaces 13 9113 Google Scholar
[13]	Li Z Y 2018 Adv. Opt. Mater. 6 1701097 Google Scholar
[14]	Yu Y, Xiao T H, Wu Y Z, Li W J, Zeng Q G, Long L, Li Z Y 2020 Adv. Photonics 2 014002 Google Scholar
[15]	Mi X H, Wang Y Y, Li R, Sun M T, Zhang Z L, Zheng H R 2019 Nanophotonics 8 487 Google Scholar
[16]	Kim K H, Choe S H 2017 Plasmonics 12 855 Google Scholar
[17]	Oulton R F, Sorger V J, Zentgraf T, Ma R M, Gladden C, Dai L, Bartal G, Zhang X 2009 Nature 461 629 Google Scholar
[18]	Huo Y Y, Jia T Q, Zhang Y, Zhao H, Zhang S A, Feng D F, Sun Z R 2014 Appl. Phys. Lett. 104 113104 Google Scholar
[19]	Zhong X L, Li Z Y 2013 Phys. Rev. B 88 085101 Google Scholar
[20]	Li W, Ma C, Zhang L, Chen B, Chen L Y, Zeng H P 2019 Nanomaterials 9 251 Google Scholar
[21]	Yuan P, Ding X, Yang Y, Xu Q 2018 Adv. Healthc. Mater. 7 1701392 Google Scholar
[22]	Azharuddin M, Zhu G H, Das D, Ozgur E, Uzun L, Turner A P F, Patra H K 2019 Chem. Commun. 55 6964 Google Scholar
[23]	Ma X M, He S, Qiu B, Luo F, Guo L H, Lin Z Y 2019 ACS Sens. 4 782 Google Scholar
[24]	Chen H J, Kou X S, Yang Z, Ni W H, Wang J F 2008 Langmuir 24 5233 Google Scholar
[25]	Wang H Q, Rao H H, Luo M Y, Xue X, Xue Z H, Lu X Q 2019 Coord. Chem. Rev. 398 113003 Google Scholar
[26]	Kailasa S K, Koduru J R, Desai M L, Park T J, Singhal R K, Basu H 2018 TrAc, Trends Anal. Chem. 105 106 Google Scholar
[27]	Mayer K M, Hafner J H 2011 Chem. Rev. 111 3828 Google Scholar
[28]	Willets K A, Van Duyne R P 2007 Annu. Rev. Phys. Chem. 58 267 Google Scholar
[29]	Ctyroky J, Homola J, Lambeck P V, Musa S, Hoekstra H J W M, Harris R D, Wilkinson J S, Usievich B, Lyndin N M 1999 Sens. Actuator, B 54 66 Google Scholar
[30]	Fan Z K, Fang S B, Li S G, Wei Z Y 2019 Chin. Phys. B 28 094209 Google Scholar
[31]	Sobhani F, Heidarzadeh H, Bahador H 2020 Chin. Phys. B 29 068401 Google Scholar
[32]	Zhou J, Zhang J S, Xian G Y, Qi Q, Gu S Z, Shen C M, Cheng Z H, He S T, Yang H T 2019 Chin. Phys. B 28 083301 Google Scholar
[33]	Yang Y T, Zhang C H, Su C H, Ding Z N, Song Y, Chen Y G 2018 Chin. Phys. Lett. 35 096102 Google Scholar
[34]	Wiley B J, Im S H, Li Z Y, McLellan J, Siekkinen A, Xia Y N 2006 J. Phys. Chem. B 110 15666 Google Scholar
[35]	Medeghini F, Hettich M, Rouxel R, Santos S D S, Hermelin S, Pertreux E, Dias A T, Legrand F, Maioli P, Crut A, Vallee F, Miguel A S, Fatti N D 2018 ACS Nano 12 10310 Google Scholar
[36]	Roopak S, Pathak N K, Sharma R, Ji A, Pathak H, Sharma R P 2016 Plasmonics 11 1603 Google Scholar
[37]	Xu J X, Siriwardana K, Zhou Y D, Zou S L, Zhang D M 2018 Anal. Chem. 90 785 Google Scholar
[38]	Zheng P, Tang H B, Liu B T, Kasani S, Huang L, Wu N Q 2019 Nano Res. 12 63 Google Scholar
[39]	Li Z, Liu L, Fernandez-Dominguez A, Shi J, Gu C, Garcia-Vidal F, Luo Y 2019 Adv. Opt. Mater. 7 1900118 Google Scholar
[40]	Link S, EI-Sayed M 1999 J. Phys. Chem. B 103 8410 Google Scholar
[41]	Jeon H B, Tsalu P V, Ha J W 2019 Sci. Rep. 9 13635 Google Scholar
[42]	Zhou F, Liu Y, Li Z Y 2011 Chin. Phys. B 20 037303 Google Scholar
[43]	Zhang C, Chen B Q, Li Z Y, Xia Y N, Chen Y G 2015 J. Phys. Chem. C 119 16836 Google Scholar
[44]	Yeshchenko O A, Kozachenko V V, Naumenko A P, Berezovska N I, Kutsevol N V, Chumachenko V A, Haftel M, Pinchuk A O 2018 Photonics Nanostruct. 29 1 Google Scholar
[45]	Luk’yanchuk B, Zheludev N I, Maier S A, Halas N J, Nordlander P, Giessen H, Chong C T 2010 Nat. Mater. 9 707 Google Scholar
[46]	Lovera A, Gallinet B, Nordlander P, et al. 2013 ACS Nano 7 4527 Google Scholar
[47]	Movseyan A, Baudrion A L, Adam P M 2018 Opt. Express 26 6439 Google Scholar
[48]	Johnson P B, Christy R W 1972 Phys. Rev. B 6 4370 Google Scholar
[49]	周飞 2011 博士学位论文 (北京: 中国科学院物理研究所) Zhou F 2011 Ph. D. Dissertation (Beijing: Institute of Physics, Chinese Academy of Sciences) (in Chinese)
[50]	Maier S A 2007 Plasmonics: Fundamentals and Applications (Springer: Berlin) p11
[51]	Prodan E, Radloff C, Halas N J, Nordlander P 2003 Science 302 419 Google Scholar
[52]	Zhu W Q, Esteban R, Borisov A G, et al. 2016 Nat. Commun. 7 11495 Google Scholar

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金纳米双球系统的高灵敏光学传感与其消光系数及局域场增强之关联