In 2019, Prof. Wei Jin’s group developed an advanced gas sensing technique - Mode-phase-difference Photothermal Spectroscopy (MPD-PTS), and achieved ppt (parts-per-trillion) detection limit with 8 orders of magnitude dynamic range. This is another 2 orders of magnitude improvement over the state-of-the-art! This impressive work in optical fiber gas sensor has been reported in the journal Nature Communications on 12 February 2020 [1]. The reviewer of the journal commented that MPD-PTS is a landmark technique in fiber-optic gas sensing.
Also, the MPD-PTS technique was selected by Optical Society of China (OSC) as 中國光學十大進展候選推薦 (2020):
[1] Link of the article: https://www.nature.com/articles/s41467-020-14707-0
