Enhancement of localized resonance through non-centrosymmetric trumpet hole arrays in Ag/Si and Ag/SiO2/Ag structure

Author

Yu, Chih-Wei ; Chang, Yi-Tsung ; Chen, Hung-Shin ; Lee, Si-Chen

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2011

fDate

15-18 Aug. 2011

Firstpage

1416

Lastpage

1419

Abstract

Extraordinary transmission through metallic film perforated by periodic holes array is often induced by surface plasmon. However, the non-centrosymmetric trumpet shaped holes enhance localized resonance inside the trumpet cavity. The measured results of the transmission and reflection spectra of Ag/Si and Ag/SiO₂/Ag structures, respectively, reveal that spectral peaks shift according to the size of the trumpet cavity but not the period of the array indicating the localized nature of the resonant modes. The interaction between Wood´s anomaly and LSRs were described directly. Moreover, the reflection spectra reveals double (1,0)Ag/SiO₂ LSRs inside.

Keywords

MIM structures; elemental semiconductors; infrared spectra; metallic thin films; semiconductor-metal boundaries; silicon; silicon compounds; silver; surface plasmon resonance; Ag-SiO₂-Ag; Wood´s anomaly; localized nature; localized resonance; metallic film; noncentrosymmetric trumpet hole arrays; noncentrosymmetric trumpet shaped holes; periodic holes array; reflection spectra; resonant modes; spectral peaks; surface plasmon; transmission spectra; trumpet cavity; Cavity resonators; Dispersion; Equations; Films; Metals; Reflection; Silicon; Nano Photonics; Non-centrosymmetric; Wood´s anomaly;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology (IEEE-NANO), 2011 11th IEEE Conference on

Conference_Location

Portland, OR

ISSN

1944-9399

Print_ISBN

978-1-4577-1514-3

Electronic_ISBN

1944-9399

Type

conf

DOI

10.1109/NANO.2011.6144302

Filename

6144302