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Narrow terahertz attenuation signatures in Bacillus thuringiensis
Weidong Zhang1, Elliott R Brown, Leamon Viveros
1Terahertz Sensor Laboratory, Depts. of Physics and Electrical Engineering, Wright State University, Dayton, OH, USA, 45435. weidong.zhang@wright.edu.
Abstract:
Terahertz absorption signatures from culture-cultivated Bacillus thuringiensis were measured with a THz photomixing spectrometer operating from 400 to 1200 GHz. We observe two distinct signatures centered at ∼955 and 1015 GHz, and attribute them to the optically coupled particle vibrational resonance (surface phonon-polariton) of Bacillus spores. This demonstrates the potential of the THz attenuation signatures as "fingerprints" for label-free biomolecular detection.
