Advanced Photonics, Volume. 3, Issue 2, 026003(2021)
Time-domain terahertz optoacoustics: manipulable water sensing and dampening
Fig. 1. Schematic for time-domain THz-OA measurement. (a) Schematic of the setup. MT, metal tape;
Fig. 2. THz-OA responses from an agar-in-water phantom, water flowing through a microfluidic chip, and a fresh beef brisket slice. (a) Schematic of the production of THz-OA signal by an agar phantom of thickness
Fig. 3. Temperature dependence of the THz-OA signal of water. (a) Time-domain THz-OA signal of water at different temperatures. (b) The THz-OA signals from (a) were transformed to the frequency domain. (c) THz-OA amplitudes of water over the temperature range from 0°C to 5°C. The insets show the raw THz-OA signal at 0°C (dark blue) or 4°C (light blue).
Fig. 4. Concentration dependence of the time-domain THz-OA signal of NaCl solutions with light concentrations at 24°C and 5°C. (a) THz-TDS profiles of pure water and increasingly concentrated NaCl solutions. Measurements were taken at 24°C. (b) THz-OA response of pure water and increasingly concentrated NaCl solutions at 24°C. (c) The same measurements were performed as in (b) but at 5°C. (d) Normalized amplitudes obtained for different NaCl concentrations in aqueous solution using the proposed THz-OA effect at 24°C (purple) and 5°C (black) and a commercially available THz-TDS (brown).
Fig. 5. Concentration dependence of THz-OA amplitude of
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Jiao Li, Yixin Yao, Liwen Jiang, Shuai Li, Zhihao Yi, Xieyu Chen, Zhen Tian, Weili Zhang, "Time-domain terahertz optoacoustics: manipulable water sensing and dampening," Adv. Photon. 3, 026003 (2021)
Category: Research Articles
Received: Dec. 12, 2020
Accepted: Mar. 1, 2021
Published Online: Apr. 6, 2021
The Author Email: Zhen Tian (tianzhen@tju.edu.cn), Weili Zhang (weili.zhang@okstate.edu)