Chinese Journal of Lasers, Volume. 49, Issue 6, 0608003(2022)
Electric Field Enhancement for Hybrid Structure Containing Silver Grating and Silver Nanoparticles
Figures & Tables(11)
Fig. 1. Schematic of grating/nanoparticles hybrid structure. (a) Side view; (b) top view
Fig. 2. Fitted extinction spectra of Ag NPs array with different gap sizes on Si wafer
Fig. 4. Fitted extinction spectra of hybrid structure of Ag NPs with 50 nm diameter and Ag gratings with different|periods. (a) 416 nm; (b) 468 nm; (c) 520 nm; (d) 572 nm
Fig. 5. Electric field enhancement factors for different structures at 532, 633, and 785 nm excitation laser wavelengths
Fig. 6. Electric field distributions in xoy plane for hybrid structure of Ag grating with period of 520 nm and Ag NPs|under different excitation laser wavelengths. (a) 532 nm; (b) 633 nm; (c) 785 nm
Fig. 7. Extinction spectra for hybrid structure of Ag grating with period of 520 nm and Ag NPs under different ridge widths
Table 1. Electric field enhancement factors of Ag NPs with two gap sizes on Si wafer under different excitation laser wavelengths
View tableTable 1. Electric field enhancement factors of Ag NPs with two gap sizes on Si wafer under different excitation laser wavelengths
Gap Wavelength of 785 nm Wavelength of 633 nm Wavelength of 532 nm 460 nm 3.6 5.0 7.8 2 nm 474.7 984.1 1146.5
Table 2. Comparison of calculated and fitted surface plasma resonance wavelengths for gratings with different periods unit: nm
View tableTable 2. Comparison of calculated and fitted surface plasma resonance wavelengths for gratings with different periods unit: nm
Method P＝416 nm P＝468 nm P＝520 nm P＝572 nm Equation (4) 449 495 542 591 FDTD 462 520 575 627
Table 3. Electric field enhancement factors for hybrid structure of Ag grating with period of 520 nm and Ag NPs under different ridge widths
View tableTable 3. Electric field enhancement factors for hybrid structure of Ag grating with period of 520 nm and Ag NPs under different ridge widths
Excitation wavelength /nm W＝258 nm W＝206 nm W＝154 nm 785 2718 2404 2370 633 1580 1851 2086 532 2102 1372 1298
Table 4. Electric field enhancement factors for hybrid structure of pure Ag and Ag-Au4 gratings under 785, 633, and 532 nm excitation laser wavelengths
View tableTable 4. Electric field enhancement factors for hybrid structure of pure Ag and Ag-Au4 gratings under 785, 633, and 532 nm excitation laser wavelengths
Hybrid structure 785 nm 633 nm 532 nm Ag grating 2718 1580 2102 Ag-Au4 grating 3041 ↑ 1487 ↓ 2571 ↑
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Chunfang Wu, Hao Pan, Yechuan Zhu. Electric Field Enhancement for Hybrid Structure Containing Silver Grating and Silver Nanoparticles[J]. Chinese Journal of Lasers, 2022, 49(6): 0608003
Paper Information
Category: nonlinear optics
Received: Jul. 23, 2021
Accepted: Aug. 24, 2021
Published Online: Mar. 2, 2022
The Author Email: Wu Chunfang (wuchf@xatu.edu.cn)
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