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Compared to the conventional optical bias scheme, the common noise is reduced and the dynamic range as well as the signal-to-noise ratio are doubled. It provides a simple alternative for coherent broadband terahertz detection. The influence of optical bias on terahertz waveform is also investigated, and the evolution of the terahertz-induced second harmonic with probe delay is further revealed. This new detection scheme for broadband terahertz will boost the application of terahertz time-domain spectroscopy for its miniaturization and integrability.<\/jats:p>","DOI":"10.3390\/s22197569","type":"journal-article","created":{"date-parts":[[2022,10,10]],"date-time":"2022-10-10T05:12:21Z","timestamp":1665378741000},"page":"7569","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Broadband Terahertz Detection by Laser Plasma with Balanced Optical Bias"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2206-3411","authenticated-orcid":false,"given":"Xu","family":"Sun","sequence":"first","affiliation":[{"name":"Department of Physics, National University of Defense Technology, Changsha 410073, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhi-Hui","family":"Lyu","sequence":"additional","affiliation":[{"name":"Department of Physics, National University of Defense Technology, Changsha 410073, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hai-Zhong","family":"Wu","sequence":"additional","affiliation":[{"name":"Department of Physics, National University of Defense Technology, Changsha 410073, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cong-Sen","family":"Meng","sequence":"additional","affiliation":[{"name":"Department of Physics, National University of Defense Technology, Changsha 410073, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1357-4284","authenticated-orcid":false,"given":"Dong-Wen","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Physics, National University of Defense Technology, Changsha 410073, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhi-Zhong","family":"Lu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Robotics Engineering and Intelligent Manufacturing, Southwest Petroleum University, Nanchong 637001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiao-Wei","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Physics, National University of Defense Technology, Changsha 410073, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zeng-Xiu","family":"Zhao","sequence":"additional","affiliation":[{"name":"Department of Physics, National University of Defense Technology, Changsha 410073, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9315-0854","authenticated-orcid":false,"given":"Jian-Min","family":"Yuan","sequence":"additional","affiliation":[{"name":"Department of Physics, National University of Defense Technology, Changsha 410073, China"},{"name":"Graduate School of China Academy of Engineering Physics, Beijing 100193, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1210","DOI":"10.1364\/OL.25.001210","article-title":"Intense terahertz pulses by four-wave rectification in air","volume":"25","author":"Cook","year":"2000","journal-title":"Opt. 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Terahertz Waves"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/19\/7569\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T00:47:12Z","timestamp":1760143632000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/19\/7569"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,10,6]]},"references-count":24,"journal-issue":{"issue":"19","published-online":{"date-parts":[[2022,10]]}},"alternative-id":["s22197569"],"URL":"https:\/\/doi.org\/10.3390\/s22197569","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,10,6]]}}}