Determination of the complex refractivity of Au, Cu and Al in terahertz and far-infrared regions from reflection spectra measurements
| Autor: | Geng Zhang, Yan-qing Gao, Zhensen Wu, Qiu-jie Yang, Zhi-qiang Yang, Yuan Mou |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Kramers–Kronig relations Spectrometer Infrared Terahertz radiation business.industry Physics::Optics Condensed Matter Physics 01 natural sciences Drude model Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics Optics Far infrared Ellipsometry 0103 physical sciences Reflection (physics) 010306 general physics business |
| Zdroj: | Infrared Physics & Technology. 80:58-64 |
| ISSN: | 1350-4495 |
| Popis: | A scheme to determine the complex refractivity of gold (Au), Copper (Cu) and Aluminum (Al) from measurements of ellipsometer and spectrometer are proposed in this paper. The reflection spectra of the metals from 4 THz to 40 THz are measured with spectrometer. The determined refractivity by Kramers-Kronig (KK) algorithm coincides with the measured results from ellipsometer in far infrared region. Drude model is invited to make the wing correction on the terahertz reflection spectra, which helps to eliminate the effects of the noises from spectrometer on KK algorithm. The calculated refractive indexes from measured spectra in terahertz region are in consistent with those from corrected reflection spectra. The advantage of the scheme is to obtain terahertz dispersion properties based on limited information in infrared region. |
| Databáze: | OpenAIRE |
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