太赫兹波位于微波与中红外波段之间，具有低能量、组织无害性、弱散射性等优势，并能敏感捕捉生物结构功能变化，是理想的生物医学检测工具。但太赫兹波容易被水吸收，太赫兹生物医学应用长期面临两大挑战：如何排除复杂样本中水分子的干扰，以及穿透厚生物组织实现在体探测。

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