Title :
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
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;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2011 11th IEEE Conference on
Conference_Location :
Portland, OR
Print_ISBN :
978-1-4577-1514-3
Electronic_ISBN :
1944-9399
DOI :
10.1109/NANO.2011.6144302
