Infra-Red Emission for Heat Radiation from Micro-Cone Textured Metallic Sheet Device with Semi-Regular Alignment

Abstract

A micro-cone textured copper sheet was fabricated as an emitter of electromagnetic waves in the near-infrared (IR) to the far-IR wave lengths. This micro-cone texture was aligned in semi-regular by varying the micro-cone size parameters. The micro-cone height (H) was varied from 0.5 µm to 4 µm in average. SEM analysis was utilized to characterize the microstructure of micro-cone textures and to measure the population of micro-cone height (H), its root diameter (B) and pitch (D) with aid of the picture processing and computational geometry. This height population P (H) was compared to the IR emission spectrum, which was measured by the FT-IR (Fourier Transformation IR). Even varying the average height of micro-cone textures, the IR-emission wavelength (λ) abided by the resonance condition by λ ~ 2 x H within the standard deviation of heights and wavelengths. Through the heat radiation experiment in vacuum, the emitted heat flux was estimated to be 58 W/m2 by the one-dimensional heat balance between the heating rate of objective body and the radiated heat flux.