Abstract

Terahertz optoacoustics (THz-OA) combines the advantages of abundant molecular characteristic absorptions in a terahertz band and the low attenuation through ultrasonic detection. Frequency-domain THz-OA, benefiting from the compact and the low cost of a continuous-wave THz source, has been used in gas detection and sensing. However, liquid and solid detections are hard to achieve due to the sensitivity limitation of existing technologies. Here we present a high-sensitivity frequency-domain THz-OA system with customized optoacoustic cells to accomplish non-contact quantitative detection of gas, liquid, and solid samples. The relationships between signal amplitudes and sample concentration, volume and temperature are discussed separately, revealing a potential application of this technology.

© 2024 Optica Publishing Group

Bimodal optical and optoacoustic multiview microscope in the frequency-domain

Mikis Mylonakis, George J. Tserevelakis, Georgios Vlachos, Eleftheria Fanouraki, Anastasios Pavlopoulos, Michalis Pavlidis, and Giannis Zacharakis
Opt. Lett. 49(3) 462-465 (2024)

Zeptojoule detection of terahertz pulses by parametric frequency upconversion

Défi Junior Jubgang Fandio, Aswin Vishnuradhan, Eeswar Kumar Yalavarthi, Wei Cui, Nicolas Couture, Angela Gamouras, and Jean-Michel Ménard
Opt. Lett. 49(6) 1556-1559 (2024)

TT-type resonator-based differential photoacoustic spectroscopy for trace gas detection

Fupeng Wang, Liyan Fu, Jianguo Zhang, Ze Han, Shuo Pang, Qingsheng Xue, Diansheng Cao, Qian Li, and Qiang Wang
Opt. Lett. 49(8) 2173-2176 (2024)

Hybrid spherical array for combined volumetric optoacoustic and B-mode ultrasound imaging

Hsiao-Chun Amy Lin, Xosé Luís Deán-Ben, Ali Ozbek, Yi-Hsuan Shao, Berkan Lafci, and Daniel Razansky
Opt. Lett. 49(6) 1469-1472 (2024)

Temperature-dependent charge carrier behavior in phosphorene quantum dots probed by terahertz time-domain spectroscopy

Pengcheng Ji, Xuan Liu, Lei Hou, and Lan Ding
Opt. Lett. 49(2) 214-217 (2024)