Abstract-The terahertz spectrum detection of transgenic food

• Jianjun Liu^a, , 
• Zhi Li^a, b

• ^a School of Mechano-Electronic Engineering, Xidian University, Xi’an, Shanxi 710071, PR China
• ^b School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin, Guangxi 541004, PR China

http://www.sciencedirect.com/science/article/pii/S0030402614011139

Received 13 July 2013, Accepted 5 January 2014, Available online 4 November 2014

This paper presents the optical characteristic of the four transgenic foods in the terahertz (THz) by means of electro-optic sampling. The transmission spectra and complex refractive index of the four transgenic foods are obtained. This paper finds that transgenic maize (TGM), transgenic rice (TGR), transgenic soybean (TGS) and transgenic potato (TGP) all have absorption within the frequency range of 0.2 and 2.5 THz. It can be seen that the TGM and TGR have obvious absorption peaks at 1.08 and 1.82 THz respectively, the TGS has a plurality of absorption peak in this frequency band, compared to the other three samples, and the TGP is slow. The unique absorption properties in THz of four transgenic foods show that the time-resolved terahertz spectroscopy can be applied to detect and identify transgenic food.