| Autor: |
Nader, Nima, Vangala, Shivashankar, Hendrickson, Joshua R., Leedy, Kevin D., Look, David C., Junpeng Guo, Cleary, Justin W. |
| Předmět: |
|
| Zdroj: |
Journal of Applied Physics; 2015, Vol. 118 Issue 18, p173106-1-173106-6, 6p, 2 Diagrams, 4 Graphs |
| Abstrakt: |
Experimental results pertaining to plasmon resonance tunneling through a highly conductive zinc oxide (ZnO) layer with subwavelength hole-arrays is investigated in the mid-infrared regime. Gallium-doped ZnO layers are pulsed-laser deposited on a silicon wafer. The ZnO has metallic optical properties with a bulk plasma frequency of 214 THz, which is equivalent to a free space wavelength of 1.4 μm. Hole arrays with different periods and hole shapes are fabricated via a standard photolithography process. Resonant mode tunneling characteristics are experimentally studied for different incident angles and compared with surface plasmon theoretical calculations and finite-difference time-domain simulations. Transmission peaks, higher than the baseline predicted by diffraction theory, are observed in each of the samples at wavelengths that correspond to the excitation of surface plasmon modes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
