Optical constants and thermo-optic coefficients of nanocrystalline diamond films at 30-500 ○C

被引：44

作者：

Hu, Z. G. ^{[1
]}

Hess, P. ^{[1
]}

机构：

[1] Heidelberg Univ, Inst Phys Chem, D-69120 Heidelberg, Germany

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 08期

关键词：

D O I：

10.1063/1.2243863

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The refractive index and absorption index of nanocrystalline diamond (NCD) films were investigated using spectroscopic ellipsometry between 30 and 500 degrees C. Due to their high transparency the experimental spectra could be well fitted in the subgap region using a single-oscillator model with a four-phase layered structure. The single-oscillator model yields a small optical absorption in the band gap region. The temperature dependence of dispersion of the refractive index over the photon energy range of 1.15-4.75 eV was determined. Based on the Bose-Einstein model, a thermo-optic coefficient of (1/n)(partial derivative n/partial derivative T)=6.5x10(-6) K-1 at 300 K was obtained for the NCD film in the near-infrared region.

引用

页数：3

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