Papers by Author: Ting Ting Guo

Abstract: To ensure measurement accuracy and reliable, and adapt to the development of the infrared transmittance calibration needs in China, this paper introduces the mid-infrared regular transmittance bilateral comparison organized by the China National Institute of Metrology. This comparison mainly focused on the wavelength band of 4000 cm^-1-400cm^-1(2.5μm -20μm). Technical protocol, facilities, measurement methods and conditions, and uncertainties from the participating laboratories have also been introduced.

Abstract: The infrared normal spectral emissivity of microstructured silicon prepared by femtosecond laser was measured for the middle infrared waveband at temperature range 100 to 200°C. Compared to that of flat silicon, emissivity was enhanced over the entire wavelength range. For a sample with different spike height, the minimum emissivity at a temperature of 100°C is more than 0.6. Although the average emissivity is less than Nextel- Velvet-811-21 Coating , it can be used stably at more wide temperature ranges. These results show the potential for microstructured silicon to be used as a flat blackbody source or silicon-based devices.

Abstract: The absorption characteristics of micro-structural material, such as “black silicon”, aroused extensive attention. In order to understand the impact of the micro-structure, based on Monte Carlo method, the optical simulation is used for absorption characteristics of micro-structural material. In this paper, the body material used for simulation is a kind of glass, BK7, which has been widely used. And, there are a number of 400 structual cells in the model. The bottom square of each cell is fixed to 50×50 µm, and the height of cells is adjustable. For each height, the reflectance, transmittance and absorption of microstructural material can be caculated. Then the relationship between the height and reflectance, transmittance and absorption can be built up. In our simulation, a very complex relationship between the absorption and the the structure of the material is showed. Generally, the absorption increases while the height of microstructual cell increasing.