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Optical Properties of Pyrolytic Carbon Films Versus Graphite and Graphene
Galyna I Dovbeshko1, Volodymyr R Romanyuk, Denys V Pidgirnyi
1Institute of Physics of NAS of Ukraine, Prospect Nauki 46, Kyiv, 03680, Ukraine, gd@iop.kiev.ua.
Nanoscale Research Letters
|June 10, 2015
Summary
This study compares the optical properties of pyrolytic carbon (PyC) films to graphite and graphene. Ultrathin PyC films exhibit dielectric permittivity comparable to graphite and graphene in the visible spectrum.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Optoelectronics
Background:
- Pyrolytic carbon (PyC) is a versatile material with tunable optical properties.
- Understanding the optical characteristics of thin PyC films is crucial for advanced applications.
Purpose of the Study:
- To comparatively study the optical properties of pyrolytic carbon (PyC) films, graphite, and graphene.
- To determine the complex dielectric permittivity of PyC films using optical spectroscopy.
Main Methods:
- Fabrication of 5-20 nm thick pyrolytic carbon (PyC) films on silica substrates.
- Measurement of polarization-sensitive reflectance and transmittance spectra.
- Analysis using the Lorentz-Drude model.
Main Results:
- The Lorentz-Drude model accurately describes the optical properties of PyC films between 360 and 1100 nm.
- The effective dielectric permittivity of ultrathin PyC films is comparable to that of graphite and graphene in the visible spectral range.
Conclusions:
- Ultrathin pyrolytic carbon films possess optical properties similar to those of graphite and graphene.
- These findings suggest potential applications for PyC in optoelectronic devices requiring graphene-like optical responses.
