Fig. 1. Experimental light path diagram

Fig. 2. Schematic diagram of microfluidic chip manufacturing process

Fig. 3. Terahertz time domain spectra of carrier liquid

Fig. 4. Terahertz frequency domain spectra of carrier liquid

Fig. 5. Terahertz absorption coefficient of carrier liquid

Fig. 6. Schematic diagram of spectral intensity change between microfluidic chip with carrier liquid (a) and empty microfluidic chip (b)