High-temperature Infrared Transmission of Free-standing Diamond Films
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2017-02-01 |
| Journal | DOAJ (DOAJ: Directory of Open Access Journals) |
| Authors | Hei Li-fu, Yan Xiong-bo, Zhu Rui-hua, Liangxian Chen, Liu Jinlong |
| Citations | 2 |
Abstract
Section titled āAbstractāThe combination of low absorption and extreme mechanical and thermal properties make diamond a compelling choice for some more extreme far infrared (8-12 <i>Ī¼</i>m) window applications. The optical properties of CVD diamond at elevated temperatures are critical to many of these extreme applications. The infrared transmission of free-standing diamond films prepared by DC arc plasma jet were studied at temperature varied conditions. The surface morphology, structure feature and infrared optical properties of diamond films were tested by optical microscope, X-ray diffraction, laser Raman and Fourier-transform infrared spectroscopy. The results show that the average transmittance for 8-12<i>Ī¼</i>m is decreased from 65.95% at 27ā to 52.5% at 500ā,and the transmittance drop is in three stages. Corresponding to the drop of transmittance with the temperature, diamond film absorption coefficient increases with the rise of temperature. The influence of the change of surface state of diamond films on the optical properties of diamond films is significantly greater than the influence on the internal structure.