Metal-Organic Hybrid Metamaterials for Spectral-Band Selective Active Terahertz Modulators
| Autor: | Sae June Park, Hyung Keun Yoo, Yeong Hwan Ahn, Soo Bin Cho, Joong Wook Lee, In-Wook Hwang, Chul Kang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Silicon Terahertz radiation Physics::Optics chemistry.chemical_element 02 engineering and technology Substrate (electronics) terahertz spectroscopy lcsh:Technology 01 natural sciences lcsh:Chemistry Resonator 0103 physical sciences modulators General Materials Science Thin film lcsh:QH301-705.5 Instrumentation 010302 applied physics Fluid Flow and Transfer Processes lcsh:T business.industry Process Chemistry and Technology General Engineering Metamaterial 021001 nanoscience & nanotechnology lcsh:QC1-999 Computer Science Applications Terahertz spectroscopy and technology Active layer metamaterials lcsh:Biology (General) lcsh:QD1-999 chemistry lcsh:TA1-2040 Optoelectronics active optics lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology business lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 11, Iss 2765, p 2765 (2021) Applied Sciences Volume 11 Issue 6 |
| ISSN: | 2076-3417 |
| Popis: | Optically controlled spectral-band selective terahertz (THz) modulators based on metal-organic hybrid metamaterials were investigated. An artificially structured material, which consists of two single split-ring resonators put together on the split gap side, was patterned on a silicon substrate to generate frequency-selective properties. An active layer of an organic thin film (fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester, also called PCBM) was deposited on the metamaterial-silicon structure for modulating the transmission of incident THz radiation. The metal-organic hybrid metamaterials enabled active control of spectral bands present in the transmission spectra of THz waves. In addition, the changes in the photo-excited carrier density due to the transfer of charges between the layers were quantitatively analyzed by simulation results. |
| Databáze: | OpenAIRE |
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