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This work utilizes time-domain pulsed terahertz spectroscopy to obtain the refractive index and absorption coefficient of normal and malignant human breast cancer tissues. The excised tissues are purchased from the National Disease Research Interchange and shipped within 24 hours of surgery. The tissue is immersed in Dulbecco's Modified Eagle Medium plus antibiotic during the shipment. The solution is characterized in the terahertz frequency band (0.1-4 THz)showing insignificant differences compared with distilled water and other common solutions. Healthy fibrous and fatty breast tissue are obtained from breast reduction surgery, while malignant tumors are obtained from breast cancer mastectomy or lumpectomy surgeries. The results will help understand the interaction of terahertz waves with human breast tumors and also to develop phantom tissue that can be manipulated to advance terahertz imaging.
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