Cylindrical vector beam-excited frequency-tunable second harmonic generation in a plasmonic octamer

Fajun Xiao; Wuyun Shang; Weiren Zhu; Lei Han; Malin Premaratne; Ting Mei; Jianlin Zhao

doi:doi:10.1364/PRJ.6.000157

Photonics Research, 2018, 6 (3): 03000157, Published Online: Jul. 10, 2018

Cylindrical vector beam-excited frequency-tunable second harmonic generation in a plasmonic octamer Download： 629次

Fajun Xiao ^1,*Wuyun Shang ¹Weiren Zhu ^2,3Lei Han ¹Malin Premaratne ³Ting Mei ¹Jianlin Zhao ^1,4

Author Affiliations

¹ MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an 710129, China

² Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

³ Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Monash University, Clayton, VIC 3800, Australia

⁴ e-mail: jlzhao@nwpu.edu.cn

Figures & Tables

Fig. 1. (a) Schematic view of the Ag octamer on a Si/SiO2 substrate. The geometry parameters r0, r1, g, and h are set as 100, 75, 15, and 30 nm, respectively. (b) Excitation of the octamer with tightly focused beams. Intensities and transverse polarization distributions of (c) x-polarized Gaussian beam, (d) radially and (e) azimuthally polarized beams at the focal plane. The scale bars in (c)–(e) are 200 nm.

下载图片查看原文

Fig. 2. Normalized (a) scattering and (b) absorption spectra of the octamer under excitation of x-polarized Gaussian beam. Charge distributions for (c) dark and (d) bright modes at the indicated wavelengths in (b). Intensity enhancement maps of (e) dark and (f) bright modes at the top surface of the octamer. The scale bars in (e) and (f) are 100 nm.

下载图片查看原文

Fig. 3. Normalized (a) SHG and (b) intensity enhancement spectra of the octamer illuminated by the x-polarized Gaussian beam. Normalized nonlinear polarization at the top surface of the octamer excited by the fundamental (c) dark and (d) bright modes. The scale bars in (c) and (d) are 100 nm.

下载图片查看原文

Fig. 4. Normalized scattering spectra of the octamer under excitations of (a) radially and (b) azimuthally polarized vector beams. Charge distributions of (c), (d) radial breathing modes (RBMs) and (e) azimuthally arranged dipolar mode (ADM) at the labeled wavelengths in (a) and (b), respectively. The dashed lines in (c) and (d) represent the node positions of these two modes. Intensity enhancement maps of (f), (g) two RBMs and (h) ADM at the top surface of the octamer. The scale bars in (f)–(h) are 100 nm.

下载图片查看原文

Fig. 5. (a), (b) SHG spectra of the octamer normalized by the maximum value of SHG intensity produced by the x-polarized Gaussian beam. (c), (d) Intensity enhancement spectra of the octamer. Here, (a), (c) and (b), (d) are under the excitations of the radially and azimuthally polarized beams, respectively. Normalized nonlinear polarization at the top surface of the octamer excited by the fundamental (e), (f) RBMs and (g) ADM. The scale bars in (e)–(g) are 100 nm.

下载图片查看原文

Fajun Xiao, Wuyun Shang, Weiren Zhu, Lei Han, Malin Premaratne, Ting Mei, Jianlin Zhao. Cylindrical vector beam-excited frequency-tunable second harmonic generation in a plasmonic octamer[J]. Photonics Research, 2018, 6(3): 03000157.

Cylindrical vector beam-excited frequency-tunable second harmonic generation in a plasmonic octamer Download： 629次

Fig. 3. Normalized (a) SHG and (b) intensity enhancement spectra of the octamer illuminated by the x-polarized Gaussian beam. Normalized nonlinear polarization at the top surface of the octamer excited by the fundamental (c) dark and (d) bright modes. The scale bars in (c) and (d) are 100 nm.

关于本站 Cookie 的使用提示

全站搜索

Cylindrical vector beam-excited frequency-tunable second harmonic generation in a plasmonic octamer Download： 629次

Fig. 3. Normalized (a) SHG and (b) intensity enhancement spectra of the octamer illuminated by the x-polarized Gaussian beam. Normalized nonlinear polarization at the top surface of the octamer excited by the fundamental (c) dark and (d) bright modes. The scale bars in (c) and (d) are 100 nm.

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索