CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Prev
Next
|
|
|
Influence of polarization direction, incidence angle, and geometry on near-field enhancement in two-layered gold nanowires |
Wu Da-Jian(吴大建)a)b), Jiang Shu-Min(蒋书敏)b), and Liu Xiao-Jun(刘晓峻)a)† |
a School of Physics, Nanjing University, Nanjing 210093, China;
b Faculty of Science, Jiangsu University, Zhenjiang 212013, China |
|
|
Abstract The influences of polarization direction, incidence angle, and geometry on the near-field enhancements in two-layered gold nanowires (TGNWs) have been investigated by using the vector wave function method. When the polarization direction is perpendicular to the incidence plane, the local field factor (LFF) in TGNW decreases first and then increases with the increase of the incidence angle. The minimum LFF is observed at the incidence angle of 41?. It is found that the increase of the dielectric constant of the inner core leads to the decrease of LFF. With the increase of the inner core radius, the LFF in TGNW increases first and then decreases, and the maximum LFF is observed at the inner core radius of 27 nm. On the other hand, when the polarization direction is parallel to the incidence plane, the collective motions of the induced electrons are enhanced gradually with the decrease of the incidence angle, and hence the near-field enhancement is increased.
|
Received: 29 January 2012
Revised: 29 February 2012
Accepted manuscript online:
|
PACS:
|
78.67.-n
|
(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
|
|
78.67.Bf
|
(Nanocrystals, nanoparticles, and nanoclusters)
|
|
36.40.Vz
|
(Optical properties of clusters)
|
|
73.22.Lp
|
(Collective excitations)
|
|
Fund: Project supported by the National Basic Research Program of China (Grant No. 2012CB921504), the National Natural Science Foundation of China (Grant Nos. 11174113, 10904052 and 11074124), and the PAPD of Jiangsu Higher Education Institutions, China. |
Corresponding Authors:
Liu Xiao-Jun
E-mail: liuxiaojun@nju.edu.cn
|
Cite this article:
Wu Da-Jian(吴大建), Jiang Shu-Min(蒋书敏), and Liu Xiao-Jun(刘晓峻) Influence of polarization direction, incidence angle, and geometry on near-field enhancement in two-layered gold nanowires 2012 Chin. Phys. B 21 077803
|
[1] |
Zuloaga J, Prodan E and Nordlander P 2010 ACS Nano 4 5269
|
[2] |
Solis D, Chang W S, Khanal B P, Bao K, Nordlander P, Zubarev E R and Link S 2010 Nano Lett. 10 3482
|
[3] |
Kim K, Yoon S J and Kim D 2006 Opt. Express 14 12419
|
[4] |
Wang Q Q, Han J B, Gong H M, Chen D J, Zhao X J, Feng J Y and Ren J J 2006 Adv. Funct. Mater. 16 2405
|
[5] |
Neubrech F, Kolb T, Lovrincic R, Fahsold G, Pucci A, Aizpurua J, Cornelius T W, Toimil-Molares M E, Neumann R and Karim S 2006 Appl. Phys. Lett. 89 253104
|
[6] |
Verhagen E, Spasenovic M, Polman A and Kuipers L 2009 Phys. Rev. Lett. 102 203904
|
[7] |
Kreibig U and Vollmer M 1995 Optical Properties of Metal Clusters (Berlin: Springer)
|
[8] |
Zong R L, Zhou J, Li B, Fu M, Shi S K and Li L T 2005 J. Chem. Phys. 123 094710
|
[9] |
Podolskiy V A 2003 Opt. Express 11 735
|
[10] |
Hendren W R, Murphy A, Evans P, O'Connor D, Wurtz G A, Zayats A V, Atkinson R and Pollard R J 2008 J. Phys.: Condens. Matter 20 362203
|
[11] |
Wu D J, Liu X J and Li B 2011 J. Appl. Phys. 109 083540
|
[12] |
Giannini V and S醤chez-Gil J A 2007 J. Opt. Soc. Am. A 24 2822
|
[13] |
Ruda H E and Shik A 2005 Phys. Rev. B 72 115308
|
[14] |
Averitt R D, Westcott S L and Halas N J 1999 J. Opt. Soc. Am. B 16 1824
|
[15] |
Wu D J and Liu X J 2008 Acta Phys. Sin. 57 5138 (in Chinese)
|
[16] |
Johnson P B and Christy R W 1972 Phys. Rev. B 6 4370
|
[17] |
Bohren C F and Huffman D R 1983 Absorption and Scattering of Light by Small Particles (New York: Wiley)
|
[18] |
Gurwich I, Shiloah N and Kleiman M 1999 J. Quan. Spect. Radi. Tran. 63 217
|
[19] |
Evanoff D D and Chumanov G 2004 J. Phys. Chem. B 108 13957
|
[20] |
Kelly K L, Coronado E, Zhao L L and Schatz G C 2003 J. Phys. Chem. B 107 668
|
[21] |
Prodan E, Radloof C, Halas N J and Nordlander P 2003 Science 302 419
|
[22] |
Moradi A 2008 J. Phys. Chem. Solids 69 2936
|
[23] |
Prodan E and Nordlander P 2004 J. Chem. Phys. 120 5444
|
[24] |
Prodan E, Lee A and Nordlander P 2002 Chem. Phys. Lett. 360 325
|
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|