Light scattering effect of powder in terahertz subwavelength band

Man Zhang; Jing-ling Shen

doi:10.1117/12.900179

11 August 2011 Light scattering effect of powder in terahertz subwavelength band

Man Zhang, Jing-ling Shen

Proceedings Volume 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications; 81950H (2011) https://doi.org/10.1117/12.900179
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Light scattering effect can be commonly occurred in the terahertz transmitting spectra of various powders (particle sizes are average less than 50μm), include pure materials and mixtures. Light scattering of various materials distort absorption spectra. We demonstrate the effect using mixture of two kinds of powders with different refractive index. According to the Mie theory, we explain the reason of light scattering effect in subwavelength domain, relying on refractive index between the powders and their surrounding medium. Furthermore, we show a wavelet method which can extracts terahertz spectral information without considering scattering effect.

Citation Download Citation

Man Zhang and Jing-ling Shen "Light scattering effect of powder in terahertz subwavelength band", Proc. SPIE 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications, 81950H (11 August 2011); https://doi.org/10.1117/12.900179

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